{"id":"CVE-2020-15250","aliases":["ALPINE-CVE-2020-15250","AZL-41745","CLSA-2026-1779151613","CLSA-2026-1792655995","DEBIAN-CVE-2020-15250","DLA-2426-1","EUVD-2020-1400","GHSA-269g-pwp5-87pp","MGASA-2020-0403","OESA-2021-1053","RHLW-2026-8de53cade32781fb","RHLW-2026-aabbc2804b02664a","UBUNTU-CVE-2020-15250","USN-4731-1"],"status":"published","title":"Information disclosure in JUnit4","description":"In JUnit4 from version 4.7 and before 4.13.1, the test rule TemporaryFolder contains a local information disclosure vulnerability. On Unix like systems, the system's temporary directory is shared between all users on that system. Because of this, when files and directories are written into this directory they are, by default, readable by other users on that same system. This vulnerability does not allow other users to overwrite the contents of these directories or files. This is purely an information disclosure vulnerability. This vulnerability impacts you if the JUnit tests write sensitive information, like API keys or passwords, into the temporary folder, and the JUnit tests execute in an environment where the OS has other untrusted users. Because certain JDK file system APIs were only added in JDK 1.7, this this fix is dependent upon the version of the JDK you are using. For Java 1.7 and higher users: this vulnerability is fixed in 4.13.1. For Java 1.6 and lower users: no patch is available, you must use the workaround below. If you are unable to patch, or are stuck running on Java 1.6, specifying the `java.io.tmpdir` system environment variable to a directory that is exclusively owned by the executing user will fix this vulnerability. For more information, including an example of vulnerable code, see the referenced GitHub Security Advisory.","severity":{"version":"3.1","score":4.4,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:N/A:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.01695,"percentile":0.77442,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-200","CWE-732"],"published":"2020-10-12T17:33:00Z","modified":"2026-11-05T05:40:51Z","fixes":[{"ecosystem":"Maven","package":"junit:junit","fixed_in":["4.13.1"],"sources":["ghsa","osv"]},{"ecosystem":"Alpine:v3.13","package":"junit","fixed_in":["4.13.1-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.14","package":"junit","fixed_in":["4.13.1-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.15","package":"junit","fixed_in":["4.13.1-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.16","package":"junit","fixed_in":["4.13.1-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.17","package":"junit","fixed_in":["4.13.1-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.18","package":"junit","fixed_in":["4.13.1-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.19","package":"junit","fixed_in":["4.13.1-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.20","package":"junit","fixed_in":["4.13.1-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.21","package":"junit","fixed_in":["4.13.1-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.22","package":"junit","fixed_in":["4.13.1-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.23","package":"junit","fixed_in":["4.13.1-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.24","package":"junit","fixed_in":["4.13.1-r0"],"sources":["osv"]},{"ecosystem":"Azure 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Advisory","fix","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-15250","tags":["web","advisory"]},{"url":"https://lists.apache.org/thread.html/rde385b8b53ed046600ef68dd6b4528dea7566aaddb02c3e702cc28bc@%3Ccommits.creadur.apache.org%3E","tags":["web","report"]},{"url":"https://lists.apache.org/thread.html/r500517c23200fb2fdb0b82770a62dd6c88b3521cfb01cfd0c76e3f8b@%3Cdev.creadur.apache.org%3E","tags":["web","report"]},{"url":"https://lists.apache.org/thread.html/r5f8841507576f595bb783ccec6a7cb285ea90d4e6f5043eae0e61a41@%3Cdev.creadur.apache.org%3E","tags":["web","report"]},{"url":"https://lists.apache.org/thread.html/r717877028482c55acf604d7a0106af4ca05da4208c708fb157b53672@%3Ccommits.creadur.apache.org%3E","tags":["web","report"]},{"url":"https://lists.apache.org/thread.html/r95f8ef60c4b3a5284b647bb3132cda08e6fadad888a66b84f49da0b0@%3Ccommits.creadur.apache.org%3E","tags":["web","report"]},{"url":"https://lists.apache.org/thread.html/ra1bdb9efae84794e8ffa2f8474be8290ba57830eefe9714b95da714b@%3Cdev.pdfbox.apache.org%3E","tags":["web"]},{"url":"https://lists.apache.org/thread.html/rb2771949c676ca984e58a5cd5ca79c2634dee1945e0406e48e0f8457@%3Cdev.creadur.apache.org%3E","tags":["web","report"]},{"url":"https://lists.apache.org/thread.html/rbaec90e699bc7c7bd9a053f76707a36fda48b6d558f31dc79147dbf9@%3Cdev.creadur.apache.org%3E","tags":["web","report"]},{"url":"https://lists.apache.org/thread.html/rc49cf1547ef6cac1be4b3c92339b2cae0acacf5acaba13cfa429a872@%3Cdev.creadur.apache.org%3E","tags":["web","report"]},{"url":"https://lists.apache.org/thread.html/rb33212dab7beccaf1ffef9b88610047c644f644c7a0ebdc44d77e381@%3Ccommits.turbine.apache.org%3E","tags":["web"]},{"url":"https://lists.apache.org/thread.html/raebf13f53cd5d23d990712e3d11c80da9a7bae94a6284050f148ed99@%3Ccommits.pulsar.apache.org%3E","tags":["web"]},{"url":"https://lists.apache.org/thread.html/r01110833b63616ddbef59ae4e10c0fbd0060f0a51206defd4cb4d917@%3Ccommits.pulsar.apache.org%3E","tags":["web"]},{"url":"https://lists.apache.org/thread.html/rde8e70b95c992378e8570e4df400c6008a9839eabdfb8f800a3e5af6@%3Ccommits.pulsar.apache.org%3E","tags":["web"]},{"url":"https://lists.apache.org/thread.html/rdbdd30510a7c4d0908fd22075c02b75bbc2e0d977ec22249ef3133cb@%3Ccommits.pulsar.apache.org%3E","tags":["web"]},{"url":"https://lists.apache.org/thread.html/rdef7d1380c86e7c0edf8a0f89a2a8db86fce5e363457d56b722691b4@%3Ccommits.pulsar.apache.org%3E","tags":["web"]},{"url":"https://lists.apache.org/thread.html/rea812d8612fdc46842a2a57248cad4b01ddfdb1e9b037c49e68fdbfb@%3Ccommits.pulsar.apache.org%3E","tags":["web"]},{"url":"https://lists.apache.org/thread.html/reb700e60b9642eafa4b7922bfee80796394135aa09c7a239ef9f7486@%3Ccommits.pulsar.apache.org%3E","tags":["web"]},{"url":"https://lists.apache.org/thread.html/rf2ec93f4ca9a97d1958eb4a31b1830f723419ce9bf2018a6e5741d5b@%3Ccommits.pulsar.apache.org%3E","tags":["web"]},{"url":"https://lists.apache.org/thread.html/rf797d119cc3f51a8d7c3c5cbe50cb4524c8487282b986edde83a9467@%3Ccommits.pulsar.apache.org%3E","tags":["web"]},{"url":"https://lists.apache.org/thread.html/r30f502d2f79e8d635361adb8108dcbb73095163fcbd776ee7984a094@%3Ccommits.creadur.apache.org%3E","tags":["web"]},{"url":"https://lists.apache.org/thread.html/r09cfbb5aedd76023691bbce9ca4ce2e16bb07dd37554a17efc19935d@%3Cpluto-dev.portals.apache.org%3E","tags":["web"]},{"url":"https://lists.apache.org/thread.html/r29d703d1986d9b871466ff24082a1828ac8ad27bb0965a93a383872e@%3Cpluto-scm.portals.apache.org%3E","tags":["web"]},{"url":"https://lists.apache.org/thread.html/r2b78f23bc2711a76a7fc73ad67b7fcd6817c5cfccefd6f30a4f54943@%3Cdev.knox.apache.org%3E","tags":["web"]},{"url":"https://lists.apache.org/thread.html/r687f489b10b0d14e46f626aa88476545e1a2600b24c4ebd3c0d2a10b@%3Cdev.knox.apache.org%3E","tags":["web"]},{"url":"https://lists.apache.org/thread.html/r925eaae7dd8f77dd61eefc49c1fcf54bd9ecfe605486870d7b1e9390@%3Cpluto-dev.portals.apache.org%3E","tags":["web"]},{"url":"https://lists.apache.org/thread.html/r934208a520b38f5cf0cae199b6b076bfe7d081809528b0eff2459e40@%3Cdev.knox.apache.org%3E","tags":["web"]},{"url":"https://lists.apache.org/thread.html/rf6e5d894d4b03bef537c9d6641272e0197c047c0d1982b4e176d0353@%3Cdev.knox.apache.org%3E","tags":["web"]},{"url":"https://lists.apache.org/thread.html/r1209986f79359b518d09513ff05a88e5b3c398540e775edea76a4774@%3Cdev.knox.apache.org%3E","tags":["web"]},{"url":"https://lists.apache.org/thread.html/r742b44fd75215fc75963b8ecc22b2e4372e68d67d3d859d2b5e8743f@%3Cdev.knox.apache.org%3E","tags":["web"]},{"url":"https://lists.apache.org/thread.html/r8b02dc6f18df11ff39eedb3038f1e31e6f90a779b1959bae65107279@%3Cdev.knox.apache.org%3E","tags":["web"]},{"url":"https://lists.apache.org/thread.html/r9710067c7096b83cb6ae8f53a2f6f94e9c042d1bf1d6929f8f2a2b7a@%3Ccommits.knox.apache.org%3E","tags":["web"]},{"url":"https://lists.apache.org/thread.html/rb2ffe2993f4dccc48d832e1a0f1c419477781b6ea16e725ca2276dbb@%3Cdev.knox.apache.org%3E","tags":["web"]},{"url":"https://github.com/advisories/GHSA-269g-pwp5-87pp","tags":["advisory"]},{"url":"https://security.alpinelinux.org/vuln/CVE-2020-15250","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2020-15250","tags":["advisory"]},{"url":"https://github.com/junit-team/junit4","tags":["package"]},{"url":"https://advisories.mageia.org/MGASA-2020-0403.html","tags":["advisory"]},{"url":"https://bugs.mageia.org/show_bug.cgi?id=27555","tags":["report"]},{"url":"https://www.debian.org/lts/security/2020/dla-2426","tags":["web"]},{"url":"https://openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2021-1053","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2020-15250","tags":["report"]},{"url":"https://ubuntu.com/security/notices/USN-4731-1","tags":["advisory"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2020-15250","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2020-15250","title":"Information disclosure in JUnit4","description":"In JUnit4 from version 4.7 and before 4.13.1, the test rule TemporaryFolder contains a local information disclosure vulnerability. On Unix like systems, the system's temporary directory is shared between all users on that system. Because of this, when files and directories are written into this directory they are, by default, readable by other users on that same system. This vulnerability does not allow other users to overwrite the contents of these directories or files. This is purely an information disclosure vulnerability. This vulnerability impacts you if the JUnit tests write sensitive information, like API keys or passwords, into the temporary folder, and the JUnit tests execute in an environment where the OS has other untrusted users. Because certain JDK file system APIs were only added in JDK 1.7, this this fix is dependent upon the version of the JDK you are using. For Java 1.7 and higher users: this vulnerability is fixed in 4.13.1. For Java 1.6 and lower users: no patch is available, you must use the workaround below. If you are unable to patch, or are stuck running on Java 1.6, specifying the `java.io.tmpdir` system environment variable to a directory that is exclusively owned by the executing user will fix this vulnerability. For more information, including an example of vulnerable code, see the referenced GitHub Security Advisory.","status":"published","published":"2020-10-12T17:55:13Z","modified":"2026-10-07T20:08:53.776Z","cvss":[{"version":"3.1","score":4.4,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:N/A:N","level":"medium","assessor":"cna"}],"cwes":["CWE-200"],"updated_at":"2026-11-02T14:35:50.545879Z"}],"euvd":[{"id":"EUVD-2020-1400","description":"In JUnit4 from version 4.7 and before 4.13.1, the test rule TemporaryFolder contains a local information disclosure vulnerability. On Unix like systems, the system's temporary directory is shared between all users on that system. Because of this, when files and directories are written into this directory they are, by default, readable by other users on that same system. This vulnerability does not allow other users to overwrite the contents of these directories or files. This is purely an information disclosure vulnerability. This vulnerability impacts you if the JUnit tests write sensitive information, like API keys or passwords, into the temporary folder, and the JUnit tests execute in an environment where the OS has other untrusted users. Because certain JDK file system APIs were only added in JDK 1.7, this this fix is dependent upon the version of the JDK you are using. For Java 1.7 and higher users: this vulnerability is fixed in 4.13.1. For Java 1.6 and lower users: no patch is available, you must use the workaround below. If you are unable to patch, or are stuck running on Java 1.6, specifying the `java.io.tmpdir` system environment variable to a directory that is exclusively owned by the executing user will fix this vulnerability. For more information, including an example of vulnerable code, see the referenced GitHub Security Advisory.","status":"published","published":"2020-10-12T17:55:13Z","modified":"2026-10-07T20:08:53Z","cvss":[{"version":"3.1","score":4.4,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T17:27:33.904651Z"}],"ghsa":[{"id":"GHSA-269g-pwp5-87pp","title":"TemporaryFolder on unix-like systems does not limit access to created files","description":"### Vulnerability\n\nThe JUnit4 test rule [TemporaryFolder](https://junit.org/junit4/javadoc/4.13/org/junit/rules/TemporaryFolder.html) contains a local information disclosure vulnerability.\n\nExample of vulnerable code:\n```java\npublic static class HasTempFolder {\n    @Rule\n    public TemporaryFolder folder = new TemporaryFolder();\n\n    @Test\n    public void testUsingTempFolder() throws IOException {\n        folder.getRoot(); // Previous file permissions: `drwxr-xr-x`; After fix:`drwx------`\n        File createdFile= folder.newFile(\"myfile.txt\"); // unchanged/irrelevant file permissions\n        File createdFolder= folder.newFolder(\"subfolder\"); // unchanged/irrelevant file permissions\n        // ...\n    }\n}\n```\n\n### Impact\n\nOn Unix like systems, the system's temporary directory is shared between all users on that system. Because of this, when files and directories are written into this directory they are, by default, readable by other users on that same system.\n\nThis vulnerability **does not** allow other users to overwrite the contents of these directories or files. This is purely an information disclosure vulnerability.\n\nWhen analyzing the impact of this vulnerability, here are the important questions to ask:\n\n1. Do the JUnit tests write sensitive information, like API keys or passwords, into the temporary folder?\n    - If yes, this vulnerability impacts you, but only if you also answer 'yes' to question 2.\n    - If no, this vulnerability does not impact you.\n2. Do the JUnit tests ever execute in an environment where the OS has other untrusted users. \n    _This may apply in CI/CD environments but normally won't be 'yes' for personal developer machines._\n    - If yes, and you answered 'yes' to question 1, this vulnerability impacts you.\n    - If no, this vulnerability does not impact you.\n\n### Patches\n\nBecause certain JDK file system APIs were only added in JDK 1.7, this this fix is dependent upon the version of the JDK you are using.\n - Java 1.7 and higher users: this vulnerability is fixed in 4.13.1.\n - Java 1.6 and lower users: **no patch is available, you must use the workaround below.**\n\n### Workarounds\n\nIf you are unable to patch, or are stuck running on Java 1.6, specifying the `java.io.tmpdir` system environment variable to a directory that is exclusively owned by the executing user will fix this vulnerability.\n\n### References\n- [CWE-200: Exposure of Sensitive Information to an Unauthorized Actor](https://cwe.mitre.org/data/definitions/200.html)\n- Fix commit https://github.com/junit-team/junit4/commit/610155b8c22138329f0723eec22521627dbc52ae\n\n#### Similar Vulnerabilities\n - Google Guava - https://github.com/google/guava/issues/4011\n - Apache Ant - https://nvd.nist.gov/vuln/detail/CVE-2020-1945\n - JetBrains Kotlin Compiler - https://nvd.nist.gov/vuln/detail/CVE-2020-15824\n\n### For more information\nIf you have any questions or comments about this advisory, please pen an issue in [junit-team/junit4](https://github.com/junit-team/junit4/issues).","status":"published","published":"2020-10-12T17:33:00Z","modified":"2023-02-01T05:04:50Z","cvss":[{"version":"3.1","score":4.4,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:N/A:N","level":"medium"}],"cwes":["CWE-200","CWE-732"],"updated_at":"2026-11-02T14:36:32.120868Z"}],"nvd":[{"id":"CVE-2020-15250","description":"In JUnit4 from version 4.7 and before 4.13.1, the test rule TemporaryFolder contains a local information disclosure vulnerability. On Unix like systems, the system's temporary directory is shared between all users on that system. Because of this, when files and directories are written into this directory they are, by default, readable by other users on that same system. This vulnerability does not allow other users to overwrite the contents of these directories or files. This is purely an information disclosure vulnerability. This vulnerability impacts you if the JUnit tests write sensitive information, like API keys or passwords, into the temporary folder, and the JUnit tests execute in an environment where the OS has other untrusted users. Because certain JDK file system APIs were only added in JDK 1.7, this this fix is dependent upon the version of the JDK you are using. For Java 1.7 and higher users: this vulnerability is fixed in 4.13.1. For Java 1.6 and lower users: no patch is available, you must use the workaround below. If you are unable to patch, or are stuck running on Java 1.6, specifying the `java.io.tmpdir` system environment variable to a directory that is exclusively owned by the executing user will fix this vulnerability. For more information, including an example of vulnerable code, see the referenced GitHub Security Advisory.","status":"published","published":"2020-10-12T18:15:13.233Z","modified":"2026-10-07T21:17:02.04Z","cvss":[{"version":"3.1","score":4.4,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:N/A:N","level":"medium","assessor":"secondary"},{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N","level":"medium","assessor":"primary"},{"version":"2.0","score":1.9,"vector":"AV:L/AC:M/Au:N/C:P/I:N/A:N","level":"low","assessor":"primary"}],"cwes":["CWE-200","CWE-732"],"updated_at":"2026-11-02T14:06:19.351389Z"}],"osv":[{"id":"ALPINE-CVE-2020-15250","description":"In JUnit4 from version 4.7 and before 4.13.1, the test rule TemporaryFolder contains a local information disclosure vulnerability. On Unix like systems, the system's temporary directory is shared between all users on that system. Because of this, when files and directories are written into this directory they are, by default, readable by other users on that same system. This vulnerability does not allow other users to overwrite the contents of these directories or files. This is purely an information disclosure vulnerability. This vulnerability impacts you if the JUnit tests write sensitive information, like API keys or passwords, into the temporary folder, and the JUnit tests execute in an environment where the OS has other untrusted users. Because certain JDK file system APIs were only added in JDK 1.7, this this fix is dependent upon the version of the JDK you are using. For Java 1.7 and higher users: this vulnerability is fixed in 4.13.1. For Java 1.6 and lower users: no patch is available, you must use the workaround below. If you are unable to patch, or are stuck running on Java 1.6, specifying the `java.io.tmpdir` system environment variable to a directory that is exclusively owned by the executing user will fix this vulnerability. For more information, including an example of vulnerable code, see the referenced GitHub Security Advisory.","status":"published","published":"2020-10-12T18:15:13.233Z","modified":"2026-11-03T06:32:30.993130935Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N","level":"medium"}],"updated_at":"2026-11-03T07:17:41.158523Z"},{"id":"AZL-41745","title":"CVE-2020-15250 affecting package junit for versions less than 4.13-7","description":"In JUnit4 from version 4.7 and before 4.13.1, the test rule TemporaryFolder contains a local information disclosure vulnerability. On Unix like systems, the system's temporary directory is shared between all users on that system. Because of this, when files and directories are written into this directory they are, by default, readable by other users on that same system. This vulnerability does not allow other users to overwrite the contents of these directories or files. This is purely an information disclosure vulnerability. This vulnerability impacts you if the JUnit tests write sensitive information, like API keys or passwords, into the temporary folder, and the JUnit tests execute in an environment where the OS has other untrusted users. Because certain JDK file system APIs were only added in JDK 1.7, this this fix is dependent upon the version of the JDK you are using. For Java 1.7 and higher users: this vulnerability is fixed in 4.13.1. For Java 1.6 and lower users: no patch is available, you must use the workaround below. If you are unable to patch, or are stuck running on Java 1.6, specifying the `java.io.tmpdir` system environment variable to a directory that is exclusively owned by the executing user will fix this vulnerability. For more information, including an example of vulnerable code, see the referenced GitHub Security Advisory.","status":"published","published":"2020-10-12T18:15:13Z","modified":"2026-11-05T05:40:51Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N","level":"medium"}],"updated_at":"2026-11-05T16:41:19.893001Z"},{"id":"CVE-2020-15250","description":"In JUnit4 from version 4.7 and before 4.13.1, the test rule TemporaryFolder contains a local information disclosure vulnerability. On Unix like systems, the system's temporary directory is shared between all users on that system. Because of this, when files and directories are written into this directory they are, by default, readable by other users on that same system. This vulnerability does not allow other users to overwrite the contents of these directories or files. This is purely an information disclosure vulnerability. This vulnerability impacts you if the JUnit tests write sensitive information, like API keys or passwords, into the temporary folder, and the JUnit tests execute in an environment where the OS has other untrusted users. Because certain JDK file system APIs were only added in JDK 1.7, this this fix is dependent upon the version of the JDK you are using. For Java 1.7 and higher users: this vulnerability is fixed in 4.13.1. For Java 1.6 and lower users: no patch is available, you must use the workaround below. If you are unable to patch, or are stuck running on Java 1.6, specifying the `java.io.tmpdir` system environment variable to a directory that is exclusively owned by the executing user will fix this vulnerability. For more information, including an example of vulnerable code, see the referenced GitHub Security Advisory.","status":"published","published":"2020-10-12T18:15:13.233Z","modified":"2026-10-20T13:52:28.335054821Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T15:44:14.828228Z"},{"id":"DEBIAN-CVE-2020-15250","description":"In JUnit4 from version 4.7 and before 4.13.1, the test rule TemporaryFolder contains a local information disclosure vulnerability. On Unix like systems, the system's temporary directory is shared between all users on that system. Because of this, when files and directories are written into this directory they are, by default, readable by other users on that same system. This vulnerability does not allow other users to overwrite the contents of these directories or files. This is purely an information disclosure vulnerability. This vulnerability impacts you if the JUnit tests write sensitive information, like API keys or passwords, into the temporary folder, and the JUnit tests execute in an environment where the OS has other untrusted users. Because certain JDK file system APIs were only added in JDK 1.7, this this fix is dependent upon the version of the JDK you are using. For Java 1.7 and higher users: this vulnerability is fixed in 4.13.1. For Java 1.6 and lower users: no patch is available, you must use the workaround below. If you are unable to patch, or are stuck running on Java 1.6, specifying the `java.io.tmpdir` system environment variable to a directory that is exclusively owned by the executing user will fix this vulnerability. For more information, including an example of vulnerable code, see the referenced GitHub Security Advisory.","status":"published","published":"2020-10-12T18:15:13.233Z","modified":"2026-10-26T12:00:23.688517751Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T15:45:33.384087Z"},{"id":"GHSA-269g-pwp5-87pp","title":"TemporaryFolder on unix-like systems does not limit access to created files","description":"### Vulnerability\n\nThe JUnit4 test rule [TemporaryFolder](https://junit.org/junit4/javadoc/4.13/org/junit/rules/TemporaryFolder.html) contains a local information disclosure vulnerability.\n\nExample of vulnerable code:\n```java\npublic static class HasTempFolder {\n    @Rule\n    public TemporaryFolder folder = new TemporaryFolder();\n\n    @Test\n    public void testUsingTempFolder() throws IOException {\n        folder.getRoot(); // Previous file permissions: `drwxr-xr-x`; After fix:`drwx------`\n        File createdFile= folder.newFile(\"myfile.txt\"); // unchanged/irrelevant file permissions\n        File createdFolder= folder.newFolder(\"subfolder\"); // unchanged/irrelevant file permissions\n        // ...\n    }\n}\n```\n\n### Impact\n\nOn Unix like systems, the system's temporary directory is shared between all users on that system. Because of this, when files and directories are written into this directory they are, by default, readable by other users on that same system.\n\nThis vulnerability **does not** allow other users to overwrite the contents of these directories or files. This is purely an information disclosure vulnerability.\n\nWhen analyzing the impact of this vulnerability, here are the important questions to ask:\n\n1. Do the JUnit tests write sensitive information, like API keys or passwords, into the temporary folder?\n    - If yes, this vulnerability impacts you, but only if you also answer 'yes' to question 2.\n    - If no, this vulnerability does not impact you.\n2. Do the JUnit tests ever execute in an environment where the OS has other untrusted users. \n    _This may apply in CI/CD environments but normally won't be 'yes' for personal developer machines._\n    - If yes, and you answered 'yes' to question 1, this vulnerability impacts you.\n    - If no, this vulnerability does not impact you.\n\n### Patches\n\nBecause certain JDK file system APIs were only added in JDK 1.7, this this fix is dependent upon the version of the JDK you are using.\n - Java 1.7 and higher users: this vulnerability is fixed in 4.13.1.\n - Java 1.6 and lower users: **no patch is available, you must use the workaround below.**\n\n### Workarounds\n\nIf you are unable to patch, or are stuck running on Java 1.6, specifying the `java.io.tmpdir` system environment variable to a directory that is exclusively owned by the executing user will fix this vulnerability.\n\n### References\n- [CWE-200: Exposure of Sensitive Information to an Unauthorized Actor](https://cwe.mitre.org/data/definitions/200.html)\n- Fix commit https://github.com/junit-team/junit4/commit/610155b8c22138329f0723eec22521627dbc52ae\n\n#### Similar Vulnerabilities\n - Google Guava - https://github.com/google/guava/issues/4011\n - Apache Ant - https://nvd.nist.gov/vuln/detail/CVE-2020-1945\n - JetBrains Kotlin Compiler - https://nvd.nist.gov/vuln/detail/CVE-2020-15824\n\n### For more information\nIf you have any questions or comments about this advisory, please pen an issue in [junit-team/junit4](https://github.com/junit-team/junit4/issues).","status":"published","published":"2020-10-12T17:33:00Z","modified":"2026-09-10T03:48:59.628680062Z","cvss":[{"version":"3.1","score":4.4,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:N/A:N","level":"medium"}],"cwes":["CWE-200","CWE-732"],"updated_at":"2026-11-02T15:46:33.956911Z"},{"id":"OESA-2021-1053","title":"junit security update","description":"JUnit is a simple framework to write repeatable tests. It is an instance of the xUnit architecture for unit testing frameworks.\r\n\r\nSecurity Fix(es):\r\n\r\nIn JUnit4 from version 4.7 and before 4.13.1, the test rule TemporaryFolder contains a local information disclosure vulnerability. On Unix like systems, the system's temporary directory is shared between all users on that system. Because of this, when files and directories are written into this directory they are, by default, readable by other users on that same system. This vulnerability does not allow other users to overwrite the contents of these directories or files. This is purely an information disclosure vulnerability. This vulnerability impacts you if the JUnit tests write sensitive information, like API keys or passwords, into the temporary folder, and the JUnit tests execute in an environment where the OS has other untrusted users. Because certain JDK file system APIs were only added in JDK 1.7, this this fix is dependent upon the version of the JDK you are using. For Java 1.7 and higher users: this vulnerability is fixed in 4.13.1. For Java 1.6 and lower users: no patch is available, you must use the workaround below. If you are unable to patch, or are stuck running on Java 1.6, specifying the `java.io.tmpdir` system environment variable to a directory that is exclusively owned by the executing user will fix this vulnerability. For more information, including an example of vulnerable code, see the referenced GitHub Security Advisory.(CVE-2020-15250)","status":"published","published":"2021-03-05T11:04:17Z","modified":"2026-08-18T01:15:16.813613733Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T15:52:38.987987Z"},{"id":"RHLW-2026-8de53cade32781fb","title":"Lightwell Security Advisory: junit 4.12.0.rhlw-00002","description":"Red Hat Lightwell has released junit:junit 4.12.0.rhlw-00002 with a backported security fix.\n\nCVE-2020-15250: In JUnit4 from version 4.7 and before 4.13.1, the test rule TemporaryFolder contains a local information disclosure vulnerability. On Unix like systems, the system's temporary directory is shared between all users on that system. Because of this, when files and directories are written into this directory they are, by default, readable by other users on that same system. This vulnerability does not allow other users to overwrite the contents of these directories or files. This is purely an information disclosure vulnerability. This vulnerability impacts you if the JUnit tests write sensitive information, like API keys or passwords, into the temporary folder, and the JUnit tests execute in an environment where the OS has other untrusted users. Because certain JDK file system APIs were only added in JDK 1.7, this this fix is dependent upon the version of the JDK you are using. For Java 1.7 and higher users: this vulnerability is fixed in 4.13.1. For Java 1.6 and lower users: no patch is available, you must use the workaround below. If you are unable to patch, or are stuck running on Java 1.6, specifying the `java.io.tmpdir` system environment variable to a directory that is exclusively owned by the executing user will fix this vulnerability. For more information, including an example of vulnerable code, see the referenced GitHub Security Advisory.\n\nThis patched artifact is a drop-in replacement for junit:junit 4.12.0 from Maven Central.","status":"published","published":"2026-10-09T18:05:40Z","modified":"2026-10-27T04:00:11.942138592Z","cvss":[{"version":"3.1","score":4.4,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T15:52:58.636919Z"},{"id":"RHLW-2026-aabbc2804b02664a","title":"Lightwell Security Advisory: junit 4.13.0.rhlw-00001","description":"Red Hat Lightwell has released junit:junit 4.13.0.rhlw-00001 with a backported security fix.\n\nCVE-2020-15250: In JUnit4 from version 4.7 and before 4.13.1, the test rule TemporaryFolder contains a local information disclosure vulnerability. On Unix like systems, the system's temporary directory is shared between all users on that system. Because of this, when files and directories are written into this directory they are, by default, readable by other users on that same system. This vulnerability does not allow other users to overwrite the contents of these directories or files. This is purely an information disclosure vulnerability. This vulnerability impacts you if the JUnit tests write sensitive information, like API keys or passwords, into the temporary folder, and the JUnit tests execute in an environment where the OS has other untrusted users. Because certain JDK file system APIs were only added in JDK 1.7, this this fix is dependent upon the version of the JDK you are using. For Java 1.7 and higher users: this vulnerability is fixed in 4.13.1. For Java 1.6 and lower users: no patch is available, you must use the workaround below. If you are unable to patch, or are stuck running on Java 1.6, specifying the `java.io.tmpdir` system environment variable to a directory that is exclusively owned by the executing user will fix this vulnerability. For more information, including an example of vulnerable code, see the referenced GitHub Security Advisory.\n\nThis patched artifact is a drop-in replacement for junit:junit 4.13.0 from Maven Central.","status":"published","published":"2026-10-09T18:45:24Z","modified":"2026-10-29T14:30:03.532094737Z","cvss":[{"version":"3.1","score":4.4,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T15:52:58.636919Z"},{"id":"UBUNTU-CVE-2020-15250","description":"In JUnit4 from version 4.7 and before 4.13.1, the test rule TemporaryFolder contains a local information disclosure vulnerability. On Unix like systems, the system's temporary directory is shared between all users on that system. Because of this, when files and directories are written into this directory they are, by default, readable by other users on that same system. This vulnerability does not allow other users to overwrite the contents of these directories or files. This is purely an information disclosure vulnerability. This vulnerability impacts you if the JUnit tests write sensitive information, like API keys or passwords, into the temporary folder, and the JUnit tests execute in an environment where the OS has other untrusted users. Because certain JDK file system APIs were only added in JDK 1.7, this this fix is dependent upon the version of the JDK you are using. For Java 1.7 and higher users: this vulnerability is fixed in 4.13.1. For Java 1.6 and lower users: no patch is available, you must use the workaround below. If you are unable to patch, or are stuck running on Java 1.6, specifying the `java.io.tmpdir` system environment variable to a directory that is exclusively owned by the executing user will fix this vulnerability. For more information, including an example of vulnerable code, see the referenced GitHub Security Advisory.","status":"published","published":"2020-10-12T18:15:00Z","modified":"2026-02-04T02:57:28.6419Z","cvss":[{"version":"3.1","score":4.4,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:N/A:N","level":"medium"},{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T15:54:23.344108Z"},{"id":"CLSA-2026-1779151613","title":"TuxCare security update for junit:junit (1 CVE)","description":"TuxCare rebuilt junit:junit to address 1 CVE. Fixed in 4.13-tuxcare.1.","status":"published","published":"2026-08-04T14:52:32Z","modified":"2026-10-15T09:46:29.94707209Z","updated_at":"2026-11-02T15:43:45.090939Z"},{"id":"CLSA-2026-1792655995","title":"TuxCare security update for junit:junit (1 CVE)","description":"TuxCare rebuilt junit:junit to address 1 CVE. Fixed in 4.12-tuxcare.1.","status":"published","published":"2026-10-22T07:59:55Z","modified":"2026-10-22T14:15:02.622589475Z","updated_at":"2026-11-02T15:43:54.672859Z"},{"id":"DLA-2426-1","title":"junit4 - security update","status":"published","published":"2020-11-01T00:00:00Z","modified":"2026-03-09T01:19:23.556611Z","updated_at":"2026-11-02T15:46:10.712745Z"},{"id":"MGASA-2020-0403","title":"Updated junit packages fix a security vulnerability","description":"It was discovered that junit contained a local information disclosure\nvulnerability. On Unix like systems, the system's temporary directory is\nshared between all users on that system. Because of this, when files and\ndirectories are written into this directory they are, by default, readable by\nother users on that same system. This vulnerability does not allow other users\nto overwrite the contents of these directories or files. This is purely an\ninformation disclosure vulnerability (CVE-2020-15250).\n","status":"published","published":"2020-11-08T14:14:27Z","modified":"2026-04-16T04:43:17.633475205Z","updated_at":"2026-11-02T15:49:41.509337Z"},{"id":"USN-4731-1","title":"junit4 vulnerability","description":"It was discovered that JUnit 4 contains a local information disclosure\nvulnerability. An attacker could possibly use this issue to obtain sensitive\ninformation.\n","status":"published","published":"2021-02-10T18:56:08Z","modified":"2026-04-27T15:49:08.451632Z","updated_at":"2026-11-02T16:58:15.159055Z"}]}}