Tarfile.extract() doesn't fully respect filter parameter
Priority LOW 11CWE-281Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- High
- User interaction
- Passive
- Attack complexity
- Low
- Attack requirements
- Present
- Impact type
- —
- Confidentiality · integrity · availability
- None · Low · None
- Fix status
- Partial Red Hat: 1 fixed, 13 without a fix
Attack profile from CVSS 4.0 · CNA. Fix status from CNA and Red Hat.
Summary
In the Tarfile.extract() function, the filter parameter is not passed properly when extracting hardlinks. An affected system that extracts content from untrusted tar files could end up writing files with an unexpected uid/gid despite the user passing filter='data' to the extract() function.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00481 41st percentileScored 2026-11-07
Fix Partial CPython (Python Software Foundation): 3.10.21, 3.11.16, 3.12.14 +3Red Hat: 7 advisoriesRed Hat: 1 fixed, 13 without a fix
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Python Software Foundation | CPython | before 3.10.21; 3.11.0 to before 3.11.16; 3.12.0 to before 3.12.14; 3.13.0 to before 3.13.15; 3.14.0 to before 3.14.7; 3.15.0a1 to before 3.15.0b4 | 3.10.21, 3.11.16, 3.12.14, 3.13.15, 3.14.7, 3.15.0b4 | Patch available | CNA |
- CPython VendorPython Software Foundation Affected before 3.10.21; 3.11.0 to before 3.11.16; 3.12.0 to before 3.12.14; 3.13.0 to before 3.13.15; 3.14.0 to before 3.14.7; 3.15.0a1 to before 3.15.0b4 Fixed in 3.10.21, 3.11.16, 3.12.14, 3.13.15, 3.14.7, 3.15.0b4 Patch available CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:python:python:*:*:*:*:*:*:*:* | before 3.1.5 | Vulnerable | python-pillow |
- cpe:2.3:a:python:python:*:*:*:*:*:*:*:* Versions before 3.1.5 Vulnerable ·python-pillow
Remediation
- Fix · CNA CPython (Python Software Foundation) Fixed in 3.10.21, 3.11.16, 3.12.14, 3.13.15, 3.14.7, 3.15.0b4
Red Hat 7 advisories
- RHSA-2026:54554 Released 2026-08-13 · Red Hat rating ImportantRed Hat Hardened Images RPMs Security Update
- Red Hat Hardened Images python3.13-3.13.15-1.hum1@aarch64, python3.13-3.13.15-1.hum1@src, python3.13-3.13.15-1.hum1@x86_64 +16
- RHSA-2026:54534 Released 2026-08-13 · Red Hat rating ImportantRed Hat Hardened Images RPMs Security Update
- Red Hat Hardened Images python-unversioned-command-3.14.7-1.hum1@noarch@public-hummingbird-aarch64-rpms, python-unversioned-command-3.14.7-1.hum1@noarch@public-hummingbird-x86_64-rpms, python3-3.14.7-1.hum1@aarch64 +28
- RHSA-2026:47930 Released 2026-07-29 · Red Hat rating ModerateRed Hat Hardened Images RPMs Security Update
- Red Hat Hardened Images python3.12-3.12.13-3.7.hum1@aarch64, python3.12-3.12.13-3.7.hum1@src, python3.12-3.12.13-3.7.hum1@x86_64 +12
Show 4 more Red Hat advisories
- RHSA-2026:47926 Released 2026-07-29 · Red Hat rating ModerateRed Hat Hardened Images RPMs Security Update
- Red Hat Hardened Images python3.13-3.13.14-1.6.hum1@aarch64, python3.13-3.13.14-1.6.hum1@src, python3.13-3.13.14-1.6.hum1@x86_64 +16
- RHSA-2026:47915 Released 2026-07-29 · Red Hat rating ModerateRed Hat Hardened Images RPMs Security Update
- Red Hat Hardened Images python3.11-3.11.15-5.4.hum1@aarch64, python3.11-3.11.15-5.4.hum1@src, python3.11-3.11.15-5.4.hum1@x86_64 +12
- RHSA-2026:47896 Released 2026-07-29 · Red Hat rating ModerateRed Hat Hardened Images RPMs Security Update
- Red Hat Hardened Images python3.10-3.10.20-3.1.hum1@aarch64, python3.10-3.10.20-3.1.hum1@src, python3.10-3.10.20-3.1.hum1@x86_64 +12
- RHSA-2026:47892 Released 2026-07-29 · Red Hat rating ModerateRed Hat Hardened Images RPMs Security Update
- Red Hat Hardened Images python-unversioned-command-3.14.6-2.1.hum1@noarch@public-hummingbird-aarch64-rpms, python-unversioned-command-3.14.6-2.1.hum1@noarch@public-hummingbird-x86_64-rpms, python3-3.14.6-2.1.hum1@aarch64 +28
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Exploit Intelligence | Affected | No fix yet: Fix deferred |
| Red Hat AI Inference Server | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 10 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 6 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 7 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 8 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 9 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux AI (RHEL AI) 3 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux command line assistant | Affected | No fix yet: Fix deferred |
| Red Hat OpenShift AI (RHOAI) | Affected | No fix yet: Fix deferred |
| Red Hat OpenShift Dev Spaces | Affected | No fix yet: Fix deferred |
| Red Hat OpenShift Virtualization 4 | Affected | No fix yet: Fix deferred |
| Self-service automation portal 2 | Affected | No fix yet: Fix deferred |
| Red Hat Hardened Images | Fixed | RHSA-2026:47892, RHSA-2026:47896, RHSA-2026:47915, RHSA-2026:47926, RHSA-2026:47930, RHSA-2026:54534, RHSA-2026:54554 |
Timeline
- 2026-10-02 Threatist record created from CVE-2026-4360
- 2026-10-03 Alias added: GHSA-gf2w-jqmq-fcm8
- 2026-10-10 Affected versions changed · Red Hat
- 2026-10-16 Affected versions changed · Red Hat
References
Patch 9
- https://github.com/python/cpython/pull/151988
- https://github.com/python/cpython/issues/151987
- https://github.com/python/cpython/commit/5e0ef3f1afe892e4f64eb83368db57ac4c40cba0
- https://github.com/python/cpython/commit/7b57e8d51446297b8c7c482d224bc5f1938e4301
- https://github.com/python/cpython/commit/7ccdbaba2c54250a70d7f25632152df7655a5e0a
- https://github.com/python/cpython/commit/eee3ddf0ca10283cc7fea724aae9cd8665f8d15e
- https://github.com/python/cpython/commit/d2b2f5eacab4dd48446b63340613b05dcbbf0b44
- https://github.com/python/cpython/commit/cf23b9153181062150d061468b6d24af33fe214f
- https://github.com/python/cpython/commit/0367912be336348b30572f8029cec4a282782d92
More Python Software Foundation vulnerabilities
- TI-2024-07037 Quadratic complexity parsing cookies with backslashes CVSS 3.1HIGH 7.5
- TI-2024-11791 Bypass extraction filter to modify file metadata outside extraction directory CVSS 3.1MEDIUM 5.3
- TI-2024-00411 Quoted zip-bomb protection for zipfile CVSS 3.1MEDIUM 6.2
- TI-2026-13296 `HTTPPasswordMgr` can send saved HTTPS credentials via HTTP because of incorrect scheme matching CVSS 4.0MEDIUM 6.0
- TI-2024-06422 Email header injection due to unquoted newlines CVSS 3.1MEDIUM 5.5
- TI-2026-04606 Possible to hijack modules in current working directory CVSS 4.0MEDIUM 5.6
Sources
- CVE-2026-4360 · CVE Program
- CVE-2026-4360 · NVD
- FIRST EPSS
- GHSA-gf2w-jqmq-fcm8 · GitHub Advisory Database · CC BY 4.0
- CVE-2026-4360 · Red Hat security data · CC BY 4.0
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