{"id":"CVE-2026-24486","aliases":["CLSA-2026-1786503821","DEBIAN-CVE-2026-24486","EUVD-2026-4754","GHSA-wp53-j4wj-2cfg","OESA-2026-2276","PYSEC-2026-1852","ROOT-APP-PYPI-CVE-2026-24486","SUSE-SU-2026:0307-1","SUSE-SU-2026:20188-1","UBUNTU-CVE-2026-24486","USN-8027-1","openSUSE-SU-2026:20125-1"],"status":"published","title":"Python-Multipart has Arbitrary File Write via Non-Default Configuration","description":"Python-Multipart is a streaming multipart parser for Python. Prior to version 0.0.22, a Path Traversal vulnerability exists when using non-default configuration options `UPLOAD_DIR` and `UPLOAD_KEEP_FILENAME=True`. An attacker can write uploaded files to arbitrary locations on the filesystem by crafting a malicious filename. Users should upgrade to version 0.0.22 to receive a patch or, as a workaround, avoid using `UPLOAD_KEEP_FILENAME=True` in project configurations.","severity":{"version":"3.1","score":8.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.02206,"percentile":0.82694,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":true},"cwes":["CWE-22"],"published":"2026-01-26T23:28:05Z","modified":"2026-10-28T02:30:31Z","exploits":[{"source":"exploitdb","id":"EDB-52543","title":"Python-Multipart 0.0.22 - Path Traversal","type":"webapps","platform":"python","date":"2026-04-30","url":"https://www.exploit-db.com/exploits/52543"}],"fixes":[{"ecosystem":"PyPI","package":"python-multipart","fixed_in":["0.0.22"],"sources":["ghsa","osv"]},{"ecosystem":"TuxCare:PyPI","package":"python-multipart","fixed_in":["0.0.6.post7+tuxcare"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"python-multipart","fixed_in":["0.0.20-1.1~deb13u1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"python-multipart","fixed_in":["0.0.20-1.1"],"sources":["osv"]},{"ecosystem":"openEuler:24.03-LTS-SP3","package":"python-python-multipart","fixed_in":["0.0.22-1.oe2403sp3"],"sources":["osv"]},{"ecosystem":"Root:PyPI","package":"python-multipart","fixed_in":["0.0.5+aikido.1"],"sources":["osv"]},{"ecosystem":"openSUSE:Leap 15.6","package":"python-python-multipart","fixed_in":["0.0.9-150600.3.6.1"],"sources":["osv"]},{"ecosystem":"SUSE:Linux Enterprise Server 16.0","package":"python-python-multipart","fixed_in":["0.0.20-160000.3.1"],"sources":["osv"]},{"ecosystem":"SUSE:Linux Enterprise Server for SAP applications 16.0","package":"python-python-multipart","fixed_in":["0.0.20-160000.3.1"],"sources":["osv"]},{"ecosystem":"Ubuntu:Pro:22.04:LTS","package":"python-multipart","fixed_in":["0.0.5-2ubuntu0.1~esm1"],"sources":["osv"]},{"ecosystem":"Ubuntu:Pro:24.04:LTS","package":"python-multipart","fixed_in":["0.0.9-1ubuntu0.1~esm1"],"sources":["osv"]},{"ecosystem":"openSUSE:Leap 16.0","package":"python-python-multipart","fixed_in":["0.0.20-160000.3.1"],"sources":["osv"]}],"affected":[{"source":"ghsa","ecosystem":"PyPI","package":"python-multipart","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.0.22"}]}]},{"source":"osv","ecosystem":"TuxCare:PyPI","package":"python-multipart","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0.0.6"},{"fixed":"0.0.6.post7+tuxcare"}]}],"versions":["0.0.6","0.0.6.post1+tuxcare","0.0.6.post2+tuxcare","0.0.6.post3+tuxcare","0.0.6.post4+tuxcare","0.0.6.post5+tuxcare","0.0.6.post6+tuxcare"]},{"source":"osv","ecosystem":"Debian:12","package":"python-multipart","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.0.17-1","0.0.17-2","0.0.17-3","0.0.17-4","0.0.17-5","0.0.20-1","0.0.20-1.1","0.0.20-1.1~deb13u1","0.0.22-1","0.0.26-1","0.0.32-1","0.0.5-3","0.0.6-1","0.0.9-1"]},{"source":"osv","ecosystem":"Debian:13","package":"python-multipart","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.0.20-1.1~deb13u1"}]}],"versions":["0.0.20-1"]},{"source":"osv","ecosystem":"Debian:14","package":"python-multipart","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.0.20-1.1"}]}],"versions":["0.0.20-1","0.0.20-1.1~deb13u1"]},{"source":"osv","ecosystem":"PyPI","package":"python-multipart","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.0.22"}]}],"versions":["0.0.1","0.0.10","0.0.11","0.0.12","0.0.13","0.0.14","0.0.15","0.0.16","0.0.17","0.0.18","0.0.19","0.0.2","0.0.20","0.0.21","0.0.3","0.0.4","0.0.5","0.0.6","0.0.7","0.0.8","0.0.9"]},{"source":"osv","ecosystem":"openEuler:24.03-LTS-SP3","package":"python-python-multipart","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.0.22-1.oe2403sp3"}]}]},{"source":"osv","ecosystem":"PyPI","package":"python-multipart","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.0.22"}]}],"versions":["0.0.1","0.0.10","0.0.11","0.0.12","0.0.13","0.0.14","0.0.15","0.0.16","0.0.17","0.0.18","0.0.19","0.0.2","0.0.20","0.0.21","0.0.3","0.0.4","0.0.5","0.0.6","0.0.7","0.0.8","0.0.9"]},{"source":"osv","ecosystem":"Root:PyPI","package":"python-multipart","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.0.5+aikido.1"}]}]},{"source":"osv","ecosystem":"openSUSE:Leap 15.6","package":"python-python-multipart","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.0.9-150600.3.6.1"}]}]},{"source":"osv","ecosystem":"SUSE:Linux Enterprise Server 16.0","package":"python-python-multipart","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.0.20-160000.3.1"}]}]},{"source":"osv","ecosystem":"SUSE:Linux Enterprise Server for SAP applications 16.0","package":"python-python-multipart","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.0.20-160000.3.1"}]}]},{"source":"osv","ecosystem":"Ubuntu:Pro:22.04:LTS","package":"python-multipart","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.0.5-2ubuntu0.1~esm1"}]}],"versions":["0.0.5-2"]},{"source":"osv","ecosystem":"Ubuntu:Pro:24.04:LTS","package":"python-multipart","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.0.9-1ubuntu0.1~esm1"}]}],"versions":["0.0.5-3","0.0.6-1","0.0.9-1"]},{"source":"osv","ecosystem":"Ubuntu:25.10","package":"python-multipart","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.0.20-1"]},{"source":"osv","ecosystem":"Ubuntu:26.10","package":"python-multipart","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.0.20-1.1","0.0.26-1","0.0.32-1"]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"python-multipart","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.0.20-1","0.0.20-1.1"]},{"source":"osv","ecosystem":"Ubuntu:Pro:22.04:LTS","package":"python-multipart","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.0.5-2ubuntu0.1~esm1"}]}],"versions":["0.0.5-2"],"bundled":3},{"source":"osv","ecosystem":"Ubuntu:Pro:24.04:LTS","package":"python-multipart","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.0.9-1ubuntu0.1~esm1"}]}],"versions":["0.0.5-3","0.0.6-1","0.0.9-1"],"bundled":3},{"source":"osv","ecosystem":"openSUSE:Leap 16.0","package":"python-python-multipart","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.0.20-160000.3.1"}]}]}],"products":[{"vendor":"fastapiexpert","product":"python-multipart"},{"vendor":"kludex","product":"python-multipart"},{"vendor":"red hat","product":"lightspeed core"},{"vendor":"red hat","product":"openshift lightspeed"},{"vendor":"red hat","product":"red hat ai inference server"},{"vendor":"red hat","product":"red hat ai inference server 3.2"},{"vendor":"red hat","product":"red hat ansible automation platform 2"},{"vendor":"red hat","product":"red hat ansible automation platform 2.6"},{"vendor":"red hat","product":"red hat enterprise linux ai (rhel ai) 3"},{"vendor":"red hat","product":"red hat openshift ai (rhoai)"},{"vendor":"red hat","product":"red hat openshift ai 2.25"},{"vendor":"red hat","product":"red hat openshift ai 3.3"},{"vendor":"red hat","product":"red hat satellite 6"},{"vendor":"red hat","product":"red hat satellite 6.17"},{"vendor":"red hat","product":"red hat satellite 6.18"}],"references":[{"url":"https://github.com/Kludex/python-multipart/security/advisories/GHSA-wp53-j4wj-2cfg","tags":["x_refsource_CONFIRM","Exploit","Vendor Advisory","advisory","web","report"]},{"url":"https://github.com/Kludex/python-multipart/commit/9433f4bbc9652bdde82bbe380984e32f8cfc89c4","tags":["x_refsource_MISC","Patch","fix","web","report"]},{"url":"https://github.com/Kludex/python-multipart/releases/tag/0.0.22","tags":["x_refsource_MISC","Product","Release Notes","web","report"]},{"url":"https://access.redhat.com/security/cve/CVE-2026-24486","tags":["vdb-entry","x_refsource_REDHAT","advisory"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2433132","tags":["issue-tracking","x_refsource_REDHAT","report"]},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-24486.json","tags":["x_sadp-csaf-vex","web"]},{"url":"https://access.redhat.com/errata/RHSA-2026:3461","tags":["vendor-advisory","x_refsource_REDHAT","advisory"]},{"url":"https://access.redhat.com/errata/RHSA-2026:3462","tags":["vendor-advisory","x_refsource_REDHAT","advisory"]},{"url":"https://access.redhat.com/errata/RHSA-2026:3960","tags":["vendor-advisory","x_refsource_REDHAT","advisory"]},{"url":"https://access.redhat.com/errata/RHSA-2026:10184","tags":["vendor-advisory","x_refsource_REDHAT","advisory"]},{"url":"https://access.redhat.com/errata/RHSA-2026:42644","tags":["vendor-advisory","x_refsource_REDHAT","advisory"]},{"url":"https://access.redhat.com/errata/RHSA-2026:3782","tags":["vendor-advisory","x_refsource_REDHAT","advisory"]},{"url":"https://access.redhat.com/errata/RHSA-2026:19712","tags":["vendor-advisory","x_refsource_REDHAT","advisory"]},{"url":"https://access.redhat.com/errata/RHSA-2026:3713","tags":["vendor-advisory","x_refsource_REDHAT","advisory"]},{"url":"https://access.redhat.com/errata/RHSA-2026:44696","tags":["vendor-advisory","x_refsource_REDHAT","advisory"]},{"url":"https://access.redhat.com/errata/RHSA-2026:1504","tags":["vendor-advisory","x_refsource_REDHAT","advisory"]},{"url":"https://access.redhat.com/errata/RHSA-2026:51357","tags":["vendor-advisory","x_refsource_REDHAT","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-24486","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-wp53-j4wj-2cfg","tags":["advisory"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/24xxx/CVE-2026-24486.json","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-24486","tags":["advisory"]},{"url":"https://github.com/Kludex/python-multipart","tags":["package"]},{"url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-2276","tags":["advisory"]},{"url":"https://pypi.org/project/python-multipart","tags":["package"]},{"url":"https://www.suse.com/support/update/announcement/2026/suse-su-20260307-1/","tags":["advisory"]},{"url":"https://bugzilla.suse.com/1257301","tags":["report"]},{"url":"https://www.suse.com/security/cve/CVE-2026-24486","tags":["web"]},{"url":"https://www.suse.com/support/update/announcement/2026/suse-su-202620188-1/","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-24486","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-24486","tags":["report"]},{"url":"https://ubuntu.com/security/notices/USN-8027-1","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2024-24762","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2024-53981","tags":["report"]},{"url":"","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2026-24486","title":"Python-Multipart has Arbitrary File Write via Non-Default Configuration","description":"Python-Multipart is a streaming multipart parser for Python. Prior to version 0.0.22, a Path Traversal vulnerability exists when using non-default configuration options `UPLOAD_DIR` and `UPLOAD_KEEP_FILENAME=True`. An attacker can write uploaded files to arbitrary locations on the filesystem by crafting a malicious filename. Users should upgrade to version 0.0.22 to receive a patch or, as a workaround, avoid using `UPLOAD_KEEP_FILENAME=True` in project configurations.","status":"published","published":"2026-01-27T00:34:06.229Z","modified":"2026-09-16T12:04:19.486Z","cvss":[{"version":"3.1","score":8.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L","level":"high","assessor":"cna"},{"version":"3.1","score":8.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L","level":"high","assessor":"adp"}],"cwes":["CWE-22","CWE-22"],"updated_at":"2026-11-02T14:19:50.92611Z"}],"euvd":[{"id":"EUVD-2026-4754","description":"Python-Multipart is a streaming multipart parser for Python. Prior to version 0.0.22, a Path Traversal vulnerability exists when using non-default configuration options `UPLOAD_DIR` and `UPLOAD_KEEP_FILENAME=True`. An attacker can write uploaded files to arbitrary locations on the filesystem by crafting a malicious filename. Users should upgrade to version 0.0.22 to receive a patch or, as a workaround, avoid using `UPLOAD_KEEP_FILENAME=True` in project configurations.","status":"published","published":"2026-01-27T00:34:06Z","modified":"2026-09-16T12:04:19Z","cvss":[{"version":"3.1","score":8.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L","level":"high"}],"updated_at":"2026-11-02T17:28:16.201278Z"}],"ghsa":[{"id":"GHSA-wp53-j4wj-2cfg","title":"Python-Multipart has Arbitrary File Write via Non-Default Configuration","description":"### Summary\n\nA Path Traversal vulnerability exists when using non-default configuration options `UPLOAD_DIR` and `UPLOAD_KEEP_FILENAME=True`. An attacker can write uploaded files to arbitrary locations on the filesystem by crafting a malicious filename.\n\n### Details\n\nWhen `UPLOAD_DIR` is set and `UPLOAD_KEEP_FILENAME` is `True`, the library constructs the file path using `os.path.join(file_dir, fname)`. Due to the behavior of `os.path.join()`, if the filename begins with a `/`, all preceding path components are discarded:\n\n```py\nos.path.join(\"/upload/dir\", \"/etc/malicious\") == \"/etc/malicious\"\n```\n                        \nThis allows an attacker to bypass the intended upload directory and write files to arbitrary paths.                                         \n                                                                                                                                              \n#### Affected Configuration                                                                                                                      \n                                                                                                                                              \nProjects are only affected if all of the following are true:                                                                                     \n- `UPLOAD_DIR` is set\n- `UPLOAD_KEEP_FILENAME` is set to True\n- The uploaded file exceeds `MAX_MEMORY_FILE_SIZE` (triggering a flush to disk)\n\nThe default configuration is not vulnerable.                                                                                                \n                                                                                                                                              \n#### Impact                                                                                                                                   \n                                                                                                                                              \nArbitrary file write to attacker-controlled paths on the filesystem.                                                                        \n                                                                                                                                              \n#### Mitigation                                                                                                                                  \n                                                                                                                                              \nUpgrade to version 0.0.22, or avoid using `UPLOAD_KEEP_FILENAME=True` in project configurations.","status":"published","published":"2026-01-26T23:28:05Z","modified":"2026-01-29T03:24:54Z","cvss":[{"version":"3.1","score":8.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L","level":"high"}],"cwes":["CWE-22"],"updated_at":"2026-11-02T14:39:20.563096Z"}],"nvd":[{"id":"CVE-2026-24486","description":"Python-Multipart is a streaming multipart parser for Python. Prior to version 0.0.22, a Path Traversal vulnerability exists when using non-default configuration options `UPLOAD_DIR` and `UPLOAD_KEEP_FILENAME=True`. An attacker can write uploaded files to arbitrary locations on the filesystem by crafting a malicious filename. Users should upgrade to version 0.0.22 to receive a patch or, as a workaround, avoid using `UPLOAD_KEEP_FILENAME=True` in project configurations.","status":"published","published":"2026-01-27T01:16:02.303Z","modified":"2026-08-07T12:17:21.06Z","cvss":[{"version":"3.1","score":8.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L","level":"high","assessor":"secondary"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high","assessor":"primary"},{"version":"3.1","score":8.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L","level":"high","assessor":"secondary"}],"cwes":["CWE-22"],"updated_at":"2026-11-02T14:12:04.769088Z"}],"osv":[{"id":"CVE-2026-24486","title":"Python-Multipart has Arbitrary File Write via Non-Default Configuration","description":"Python-Multipart is a streaming multipart parser for Python. Prior to version 0.0.22, a Path Traversal vulnerability exists when using non-default configuration options `UPLOAD_DIR` and `UPLOAD_KEEP_FILENAME=True`. An attacker can write uploaded files to arbitrary locations on the filesystem by crafting a malicious filename. Users should upgrade to version 0.0.22 to receive a patch or, as a workaround, avoid using `UPLOAD_KEEP_FILENAME=True` in project configurations.","status":"published","published":"2026-01-27T00:34:06.229Z","modified":"2026-10-28T02:30:31.245079494Z","cvss":[{"version":"3.1","score":8.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L","level":"high"}],"cwes":["CWE-22"],"updated_at":"2026-11-02T15:44:59.079784Z"},{"id":"DEBIAN-CVE-2026-24486","description":"Python-Multipart is a streaming multipart parser for Python. Prior to version 0.0.22, a Path Traversal vulnerability exists when using non-default configuration options `UPLOAD_DIR` and `UPLOAD_KEEP_FILENAME=True`. An attacker can write uploaded files to arbitrary locations on the filesystem by crafting a malicious filename. Users should upgrade to version 0.0.22 to receive a patch or, as a workaround, avoid using `UPLOAD_KEEP_FILENAME=True` in project configurations.","status":"published","published":"2026-01-27T01:16:02.303Z","modified":"2026-10-01T03:03:21.188925079Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high"}],"updated_at":"2026-11-02T15:45:53.877573Z"},{"id":"GHSA-wp53-j4wj-2cfg","title":"Python-Multipart has Arbitrary File Write via Non-Default Configuration","description":"### Summary\n\nA Path Traversal vulnerability exists when using non-default configuration options `UPLOAD_DIR` and `UPLOAD_KEEP_FILENAME=True`. An attacker can write uploaded files to arbitrary locations on the filesystem by crafting a malicious filename.\n\n### Details\n\nWhen `UPLOAD_DIR` is set and `UPLOAD_KEEP_FILENAME` is `True`, the library constructs the file path using `os.path.join(file_dir, fname)`. Due to the behavior of `os.path.join()`, if the filename begins with a `/`, all preceding path components are discarded:\n\n```py\nos.path.join(\"/upload/dir\", \"/etc/malicious\") == \"/etc/malicious\"\n```\n                        \nThis allows an attacker to bypass the intended upload directory and write files to arbitrary paths.                                         \n                                                                                                                                              \n#### Affected Configuration                                                                                                                      \n                                                                                                                                              \nProjects are only affected if all of the following are true:                                                                                     \n- `UPLOAD_DIR` is set\n- `UPLOAD_KEEP_FILENAME` is set to True\n- The uploaded file exceeds `MAX_MEMORY_FILE_SIZE` (triggering a flush to disk)\n\nThe default configuration is not vulnerable.                                                                                                \n                                                                                                                                              \n#### Impact                                                                                                                                   \n                                                                                                                                              \nArbitrary file write to attacker-controlled paths on the filesystem.                                                                        \n                                                                                                                                              \n#### Mitigation                                                                                                                                  \n                                                                                                                                              \nUpgrade to version 0.0.22, or avoid using `UPLOAD_KEEP_FILENAME=True` in project configurations.","status":"published","published":"2026-01-26T23:28:05Z","modified":"2026-09-10T03:50:59.359593372Z","cvss":[{"version":"3.1","score":8.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L","level":"high"}],"cwes":["CWE-22"],"updated_at":"2026-11-02T15:46:58.767335Z"},{"id":"OESA-2026-2276","title":"python-python-multipart security update","description":"A streaming multipart parser for Python\r\n\r\nSecurity Fix(es):\n\nPython-Multipart is a streaming multipart parser for Python. Prior to version 0.0.22, a Path Traversal vulnerability exists when using non-default configuration options `UPLOAD_DIR` and `UPLOAD_KEEP_FILENAME=True`. An attacker can write uploaded files to arbitrary locations on the filesystem by crafting a malicious filename. Users should upgrade to version 0.0.22 to receive a patch or, as a workaround, avoid using `UPLOAD_KEEP_FILENAME=True` in project configurations.(CVE-2026-24486)","status":"published","published":"2026-05-09T11:11:15Z","modified":"2026-08-18T01:19:57.062097252Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high"}],"updated_at":"2026-11-02T15:52:46.087701Z"},{"id":"PYSEC-2026-1852","title":"Python-Multipart has Arbitrary File Write via Non-Default Configuration","description":"### Summary\n\nA Path Traversal vulnerability exists when using non-default configuration options `UPLOAD_DIR` and `UPLOAD_KEEP_FILENAME=True`. An attacker can write uploaded files to arbitrary locations on the filesystem by crafting a malicious filename.\n\n### Details\n\nWhen `UPLOAD_DIR` is set and `UPLOAD_KEEP_FILENAME` is `True`, the library constructs the file path using `os.path.join(file_dir, fname)`. Due to the behavior of `os.path.join()`, if the filename begins with a `/`, all preceding path components are discarded:\n\n```py\nos.path.join(\"/upload/dir\", \"/etc/malicious\") == \"/etc/malicious\"\n```\n                        \nThis allows an attacker to bypass the intended upload directory and write files to arbitrary paths.                                         \n                                                                                                                                              \n#### Affected Configuration                                                                                                                      \n                                                                                                                                              \nProjects are only affected if all of the following are true:                                                                                     \n- `UPLOAD_DIR` is set\n- `UPLOAD_KEEP_FILENAME` is set to True\n- The uploaded file exceeds `MAX_MEMORY_FILE_SIZE` (triggering a flush to disk)\n\nThe default configuration is not vulnerable.                                                                                                \n                                                                                                                                              \n#### Impact                                                                                                                                   \n                                                                                                                                              \nArbitrary file write to attacker-controlled paths on the filesystem.                                                                        \n                                                                                                                                              \n#### Mitigation                                                                                                                                  \n                                                                                                                                              \nUpgrade to version 0.0.22, or avoid using `UPLOAD_KEEP_FILENAME=True` in project configurations.","status":"published","published":"2026-07-07T16:03:20.50961Z","modified":"2026-07-07T17:48:07.217083848Z","cvss":[{"version":"3.1","score":8.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L","level":"high"}],"updated_at":"2026-11-02T15:52:55.06457Z"},{"id":"ROOT-APP-PYPI-CVE-2026-24486","title":"CVE-2026-24486 in python-multipart - Patched by Root","description":"Root has patched CVE-2026-24486 in the python-multipart package for Root:PyPI. Multiple fixed versions available.","status":"published","published":"2026-09-14T08:55:54Z","modified":"2026-09-14T09:15:04.223447603Z","cvss":[{"version":"3.1","score":8.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L","level":"high"}],"updated_at":"2026-11-02T15:53:27.940619Z"},{"id":"UBUNTU-CVE-2026-24486","description":"Python-Multipart is a streaming multipart parser for Python. Prior to version 0.0.22, a Path Traversal vulnerability exists when using non-default configuration options `UPLOAD_DIR` and `UPLOAD_KEEP_FILENAME=True`. An attacker can write uploaded files to arbitrary locations on the filesystem by crafting a malicious filename. Users should upgrade to version 0.0.22 to receive a patch or, as a workaround, avoid using `UPLOAD_KEEP_FILENAME=True` in project configurations.","status":"published","published":"2026-01-27T01:16:00Z","modified":"2026-10-27T04:17:51.262364861Z","cvss":[{"version":"3.1","score":8.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L","level":"high"},{"version":"3.1","score":8.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L","level":"high"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high"}],"updated_at":"2026-11-02T16:56:08.726452Z"},{"id":"CLSA-2026-1786503821","title":"TuxCare security update for python-multipart (1 CVE)","description":"TuxCare rebuilt python-multipart to address 1 CVE. Fixed in 0.0.6.post7+tuxcare.","status":"published","published":"2026-08-12T03:03:41Z","modified":"2026-10-15T09:48:05.386548279Z","updated_at":"2026-11-02T15:43:46.850893Z"},{"id":"openSUSE-SU-2026:20125-1","title":"Security update for python-python-multipart","description":"This update for python-python-multipart fixes the following issues:\n\n- CVE-2026-24486: Fixed non-default configuration options can lead to path traversal (bsc#1257301).\n","status":"published","published":"2026-01-28T16:07:51Z","modified":"2026-03-23T04:54:45.318743Z","updated_at":"2026-11-02T16:58:41.463445Z"},{"id":"SUSE-SU-2026:0307-1","title":"Security update for python-python-multipart","description":"This update for python-python-multipart fixes the following issues:\n\n- CVE-2026-24486: Fixed non-default configuration options can lead to path traversal (bsc#1257301).\n","status":"published","published":"2026-01-27T16:36:58Z","modified":"2026-03-23T04:52:07.270792Z","updated_at":"2026-11-02T15:54:00.846737Z"},{"id":"SUSE-SU-2026:20188-1","title":"Security update for python-python-multipart","description":"This update for python-python-multipart fixes the following issues:\n\n- CVE-2026-24486: Fixed non-default configuration options can lead to path traversal (bsc#1257301).\n","status":"published","published":"2026-01-28T16:03:29Z","modified":"2026-03-23T04:52:41.842159Z","updated_at":"2026-11-02T15:54:01.610851Z"},{"id":"USN-8027-1","title":"python-multipart vulnerabilities","description":"It was discovered that Python-Multipart incorrectly handled certain \nregular expressions. An attacker could possibly use this issue to cause\nPython-Multipart to consume excessive resources, leading to a regular \nexpression denial of service. This issue only affected Ubuntu 22.04 LTS.\n(CVE-2024-24762)\n\nIt was discovered that Python-Multipart did not properly sanitize line\nbreaks during user input. An attacker could use this issue to send \narbitrary input, thus preventing other requests from being processed, \nresulting in a denial of service. This issue was only fixed in \nUbuntu 24.04 LTS. (CVE-2024-53981)\n\nIt was discovered that Python-Multipart was vulnerable to path traversal\nattacks. An attacker could possibly craft and upload files outside the \ntarget directory, resulting in remote code execution. (CVE-2026-24486)","status":"published","published":"2026-02-11T17:05:53Z","modified":"2026-10-27T04:16:43.566662488Z","updated_at":"2026-11-02T16:58:22.951676Z"}]}}