{"id":"CVE-2026-48959","aliases":["ALPINE-CVE-2026-48959","AZL-89307","BELL-CVE-2026-48959","DEBIAN-CVE-2026-48959","EUVD-2026-32043","GHSA-7vxx-5gqr-7r44","MGASA-2026-0158","ROOT-OS-DEBIAN-11-CVE-2026-48959","ROOT-OS-DEBIAN-12-CVE-2026-48959","ROOT-OS-DEBIAN-13-CVE-2026-48959","UBUNTU-CVE-2026-48959","USN-8684-1"],"status":"published","title":"IO::Uncompress::Unzip versions before 2.220 for Perl allow CPU exhaustion via per-byte read loop in fastForward","description":"IO::Uncompress::Unzip versions before 2.220 for Perl allow CPU exhaustion via per-byte read loop in fastForward.\n\nfastForward() compares length $offset (the digit count of the offset, 1 to 19) against the chunk size $c instead of $offset itself, so $c shrinks from 16 KiB to 1-19 bytes per iteration.\n\nExtracting a named entry from an attacker supplied zip via IO::Uncompress::Unzip-\u003enew($zip, Name =\u003e $target) drives a per-byte read loop scaling with the entry's compressed size, up to the non-Zip64 4 GiB cap.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"adp","from":"cve"},"epss":{"day":"2026-11-09","score":0.00553,"percentile":0.4649,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-407"],"published":"2026-05-27T02:29:07Z","modified":"2026-11-10T12:47:34Z","fixes":[{"ecosystem":"Alpine:v3.24","package":"perl","fixed_in":["5.42.3-r0"],"sources":["osv"]},{"ecosystem":"Azure Linux:3","package":"perl","fixed_in":["5.38.2-512"],"sources":["osv"]},{"ecosystem":"Alpaquita:23","package":"perl","fixed_in":["5.36.3-r2"],"sources":["osv"]},{"ecosystem":"Alpaquita:25","package":"perl","fixed_in":["5.40.4-r1"],"sources":["osv"]},{"ecosystem":"Alpaquita:stream","package":"perl","fixed_in":["5.42.2-r1"],"sources":["osv"]},{"ecosystem":"BellSoft Hardened 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s7-1500 cpu 1518-4 pn/dp mfp (6es7518-4ax00-1ab0)"},{"vendor":"siemens","product":"simatic s7-1500 cpu 1518-4 pn/dp mfp (6es7518-4ax00-1ac0)"},{"vendor":"siemens","product":"simatic s7-1500 cpu 1518f-4 pn/dp mfp (6es7518-4fx00-1ab0)"},{"vendor":"siemens","product":"simatic s7-1500 cpu 1518f-4 pn/dp mfp (6es7518-4fx00-1ac0)"},{"vendor":"siemens","product":"siplus s7-1500 cpu 1518-4 pn/dp mfp (6ag1518-4ax00-4ac0)"}],"references":[{"url":"https://github.com/pmqs/IO-Compress/commit/68db44076f4c1a86a2ffe53a958eac6cabaf72e2.patch","tags":["patch","fix","report"]},{"url":"https://metacpan.org/release/PMQS/IO-Compress-2.220/changes","tags":["release-notes","advisory","report"]},{"url":"http://www.openwall.com/lists/oss-security/2026/05/27/2","tags":["web","report"]},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-457936.html"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-48959","tags":["web","advisory"]},{"url":"https://github.com/advisories/GHSA-7vxx-5gqr-7r44"},{"url":"https://security.alpinelinux.org/vuln/CVE-2026-48959","tags":["advisory"]},{"url":"https://docs.bell-sw.com/security/cves/CVE-2026-48959","tags":["advisory"]},{"url":"https://cpan.org/modules","tags":["web"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/48xxx/CVE-2026-48959.json","tags":["advisory"]},{"url":"https://github.com/pmqs/IO-Compress","tags":["package"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-48959","tags":["advisory"]},{"url":"https://advisories.mageia.org/MGASA-2026-0158.html","tags":["advisory"]},{"url":"https://bugs.mageia.org/show_bug.cgi?id=35593","tags":["report"]},{"url":"https://www.openwall.com/lists/oss-security/2026/05/27/1","tags":["web"]},{"url":"https://www.openwall.com/lists/oss-security/2026/05/27/2","tags":["web"]},{"url":"https://www.openwall.com/lists/oss-security/2026/05/27/3","tags":["web"]},{"url":"https://www.openwall.com/lists/oss-security/2026/05/27/4","tags":["web"]},{"url":"https://ubuntu.com/security/CVE-2026-48959","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-48959","tags":["report"]},{"url":"https://lists.security.metacpan.org/cve-announce/msg/40434381/","tags":["report"]},{"url":"https://ubuntu.com/security/notices/USN-8684-1","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2025-15649","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2026-7017","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2026-9538","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2026-12087","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2026-13221","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2026-48962","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2026-57432","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2026-57433","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2026-48959","title":"IO::Uncompress::Unzip versions before 2.220 for Perl allow CPU exhaustion via per-byte read loop in fastForward","description":"IO::Uncompress::Unzip versions before 2.220 for Perl allow CPU exhaustion via per-byte read loop in fastForward.\n\nfastForward() compares length $offset (the digit count of the offset, 1 to 19) against the chunk size $c instead of $offset itself, so $c shrinks from 16 KiB to 1-19 bytes per iteration.\n\nExtracting a named entry from an attacker supplied zip via IO::Uncompress::Unzip-\u003enew($zip, Name =\u003e $target) drives a per-byte read loop scaling with the entry's compressed size, up to the non-Zip64 4 GiB cap.","status":"published","published":"2026-05-27T02:29:07.027Z","modified":"2026-11-10T12:47:34.524Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"adp"}],"cwes":["CWE-407"],"updated_at":"2026-11-10T13:38:45.30478Z"}],"euvd":[{"id":"EUVD-2026-32043","description":"IO::Uncompress::Unzip versions before 2.220 for Perl allow CPU exhaustion via per-byte read loop in fastForward.\n\nfastForward() compares length $offset (the digit count of the offset, 1 to 19) against the chunk size $c instead of $offset itself, so $c shrinks from 16 KiB to 1-19 bytes per iteration.\n\nExtracting a named entry from an attacker supplied zip via IO::Uncompress::Unzip-\u003enew($zip, Name =\u003e $target) drives a per-byte read loop scaling with the entry's compressed size, up to the non-Zip64 4 GiB cap.","status":"published","published":"2026-05-27T02:29:07Z","modified":"2026-05-29T15:50:39Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T18:21:00.772434Z"}],"ghsa":[{"id":"GHSA-7vxx-5gqr-7r44","title":"IO::Uncompress::Unzip versions before 2.220 for Perl allow CPU exhaustion via per-byte read loop...","description":"IO::Uncompress::Unzip versions before 2.220 for Perl allow CPU exhaustion via per-byte read loop in fastForward.\n\nfastForward() compares length $offset (the digit count of the offset, 1 to 19) against the chunk size $c instead of $offset itself, so $c shrinks from 16 KiB to 1-19 bytes per iteration.\n\nExtracting a named entry from an attacker supplied zip via IO::Uncompress::Unzip-\u003enew($zip, Name =\u003e $target) drives a per-byte read loop scaling with the entry's compressed size, up to the non-Zip64 4 GiB cap.","status":"published","published":"2026-05-27T06:31:34Z","modified":"2026-05-29T18:31:16Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-407"],"updated_at":"2026-11-02T15:08:23.402135Z"}],"nvd":[{"id":"CVE-2026-48959","description":"IO::Uncompress::Unzip versions before 2.220 for Perl allow CPU exhaustion via per-byte read loop in fastForward.\n\nfastForward() compares length $offset (the digit count of the offset, 1 to 19) against the chunk size $c instead of $offset itself, so $c shrinks from 16 KiB to 1-19 bytes per iteration.\n\nExtracting a named entry from an attacker supplied zip via IO::Uncompress::Unzip-\u003enew($zip, Name =\u003e $target) drives a per-byte read loop scaling with the entry's compressed size, up to the non-Zip64 4 GiB cap.","status":"published","published":"2026-05-27T04:16:31.093Z","modified":"2026-07-24T12:10:00.21Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-407"],"updated_at":"2026-11-02T14:12:20.511562Z"}],"osv":[{"id":"ALPINE-CVE-2026-48959","description":"IO::Uncompress::Unzip versions before 2.220 for Perl allow CPU exhaustion via per-byte read loop in fastForward.\n\nfastForward() compares length $offset (the digit count of the offset, 1 to 19) against the chunk size $c instead of $offset itself, so $c shrinks from 16 KiB to 1-19 bytes per iteration.\n\nExtracting a named entry from an attacker supplied zip via IO::Uncompress::Unzip-\u003enew($zip, Name =\u003e $target) drives a per-byte read loop scaling with the entry's compressed size, up to the non-Zip64 4 GiB cap.","status":"published","published":"2026-05-27T04:16:31.093Z","modified":"2026-11-03T19:30:03.754555089Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-03T20:03:57.215693Z"},{"id":"BELL-CVE-2026-48959","status":"published","published":"2026-05-29T06:11:00.359504Z","modified":"2026-06-03T07:16:00.108783254Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:28:24.391068Z"},{"id":"CVE-2026-48959","title":"IO::Uncompress::Unzip versions before 2.220 for Perl allow CPU exhaustion via per-byte read loop in fastForward","description":"IO::Uncompress::Unzip versions before 2.220 for Perl allow CPU exhaustion via per-byte read loop in fastForward.\n\nfastForward() compares length $offset (the digit count of the offset, 1 to 19) against the chunk size $c instead of $offset itself, so $c shrinks from 16 KiB to 1-19 bytes per iteration.\n\nExtracting a named entry from an attacker supplied zip via IO::Uncompress::Unzip-\u003enew($zip, Name =\u003e $target) drives a per-byte read loop scaling with the entry's compressed size, up to the non-Zip64 4 GiB cap.","status":"published","published":"2026-05-27T02:29:07.027Z","modified":"2026-10-28T02:30:37.469100503Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-407"],"updated_at":"2026-11-02T15:45:07.060148Z"},{"id":"DEBIAN-CVE-2026-48959","description":"IO::Uncompress::Unzip versions before 2.220 for Perl allow CPU exhaustion via per-byte read loop in fastForward.  fastForward() compares length $offset (the digit count of the offset, 1 to 19) against the chunk size $c instead of $offset itself, so $c shrinks from 16 KiB to 1-19 bytes per iteration.  Extracting a named entry from an attacker supplied zip via IO::Uncompress::Unzip-\u003enew($zip, Name =\u003e $target) drives a per-byte read loop scaling with the entry's compressed size, up to the non-Zip64 4 GiB cap.","status":"published","published":"2026-05-27T04:16:31.093Z","modified":"2026-10-05T10:00:07.625436188Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:45:56.444225Z"},{"id":"UBUNTU-CVE-2026-48959","description":"IO::Uncompress::Unzip versions before 2.220 for Perl allow CPU exhaustion via per-byte read loop in fastForward. fastForward() compares length $offset (the digit count of the offset, 1 to 19) against the chunk size $c instead of $offset itself, so $c shrinks from 16 KiB to 1-19 bytes per iteration. Extracting a named entry from an attacker supplied zip via IO::Uncompress::Unzip-\u003enew($zip, Name =\u003e $target) drives a per-byte read loop scaling with the entry's compressed size, up to the non-Zip64 4 GiB cap.","status":"published","published":"2026-05-27T04:16:00Z","modified":"2026-10-17T13:00:23.966328864Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T16:56:33.391918Z"},{"id":"AZL-89307","title":"CVE-2026-48959 affecting package perl for versions less than 5.38.2-512","description":"IO::Uncompress::Unzip versions before 2.220 for Perl allow CPU exhaustion via per-byte read loop in fastForward.\n\nfastForward() compares length $offset (the digit count of the offset, 1 to 19) against the chunk size $c instead of $offset itself, so $c shrinks from 16 KiB to 1-19 bytes per iteration.\n\nExtracting a named entry from an attacker supplied zip via IO::Uncompress::Unzip-\u003enew($zip, Name =\u003e $target) drives a per-byte read loop scaling with the entry's compressed size, up to the non-Zip64 4 GiB cap.","status":"published","published":"2026-05-27T04:16:31Z","modified":"2026-11-05T05:40:51Z","updated_at":"2026-11-05T16:41:25.436971Z"},{"id":"MGASA-2026-0158","title":"Updated perl-IO-Compress package fixes security vulnerabilities","description":"The updated package fixes security vulnerabilities:\nIO::Uncompress::Unzip versions before 2.215 for Perl propagate uncaught\nexception when parsing zip header with malformed DOS date.\n(CVE-2025-15649)\nIO::Uncompress::Unzip versions before 2.220 for Perl allow CPU\nexhaustion via per-byte read loop in fastForward. (CVE-2026-48959)\nIO::Compress versions before 2.220 for Perl can execute arbitrary code\nin File::GlobMapper via an attacker-controlled output glob.\n(CVE-2026-48962)\n","status":"published","published":"2026-05-29T05:12:50Z","modified":"2026-05-29T05:15:06.863474684Z","updated_at":"2026-11-02T15:49:43.178336Z"},{"id":"ROOT-OS-DEBIAN-11-CVE-2026-48959","title":"CVE-2026-48959 in perl - Patched by Root","description":"Root has patched CVE-2026-48959 in the perl package for Root:Debian:11. Multiple fixed versions available.","status":"published","published":"2026-08-23T08:42:48Z","modified":"2026-08-23T10:16:34.079130068Z","updated_at":"2026-11-02T15:53:30.179841Z"},{"id":"ROOT-OS-DEBIAN-12-CVE-2026-48959","title":"CVE-2026-48959 in perl - Patched by Root","description":"Root has patched CVE-2026-48959 in the perl package for Root:Debian:12. Multiple fixed versions available.","status":"withdrawn","published":"2026-09-28T14:31:33Z","modified":"2026-10-08T19:00:05.891411157Z","updated_at":"2026-11-02T15:53:32.298225Z"},{"id":"ROOT-OS-DEBIAN-13-CVE-2026-48959","title":"CVE-2026-48959 in perl - Patched by Root","description":"Root has patched CVE-2026-48959 in the perl package for Root:Debian:13. Multiple fixed versions available.","status":"withdrawn","published":"2026-08-24T16:37:37Z","modified":"2026-09-16T20:00:04.587758525Z","updated_at":"2026-11-02T15:53:33.681527Z"},{"id":"USN-8684-1","title":"perl vulnerabilities","description":"It was discovered that Perl incorrectly handled certain arguments to\nSocket and pack/unpack functions. An attacker could possibly use this\nissue to read sensitive information from memory.\n(CVE-2026-12087, CVE-2026-57432)\n\nIt was discovered that Perl incorrectly handled regular expressions\nwith a large number of alternation branches. An attacker could\npossibly use this issue to cause incorrect matching results.\n(CVE-2026-13221)\n\nIt was discovered that Perl incorrectly handled certain files. An\nattacker could possibly use this issue to cause a denial of service.\n(CVE-2026-57433, CVE-2025-15649, CVE-2026-48959, CVE-2026-9538)\n\nIt was discovered that Perl incorrectly handled certain inputs. An\nattacker could possibly use this issue to execute arbitrary code.\n(CVE-2026-48962)\n\nIt was discovered that Perl incorrectly handled credential headers\nduring cross-origin redirects in HTTP::Tiny. An attacker could\npossibly use this issue to expose sensitive information.\n(CVE-2026-7017)","status":"published","published":"2026-08-27T11:10:17Z","modified":"2026-08-31T17:26:26.312880608Z","updated_at":"2026-11-02T16:58:25.103481Z"}]}}