The 'zipfile' module would not check the validity of the ZIP64 End of Central Directory (EOCD) Locator record offset value would not be used to locate the ZIP64 EOCD record, instead the ZIP64 EOCD record would be assumed to be the previous record in the ZIP archive. This could be abused to create ZIP archives that are handled differently by the 'zipfile' module compared to other ZIP implementations. Remediation maintains this behavior, but checks that the offset specified in the ZIP64 EOCD Locator record matches the expected value.
Conclusion & alert: CVE-2025-8291 is rated Low Risk (24.9/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.07%). Mandatory action: Monitor for updates and reassess as exploit intelligence or EPSS changes.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2026-03-05 | 0.17% | 0.07% | -0.09% |
| 2 | 2026-02-06 | 0.07% | 0.17% | +0.10% |
| 3 | 2025-10-16 | — | 0.07% | — |
Full EPSS history (4 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 4.3 | 3.1 | MEDIUM |
|
2.8 | 1.4 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
end-of-life | CVE-2025-8291 end-of-life priority: Debian including 6 source packages (jython, pypy3, python3.11, python3.13, python3.14, python3.9), 17 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 10, open 7. | https://security-tracker.debian.org/tracker/CVE-2025-8291 |
redhat
|
medium | — | https://access.redhat.com/security/cve/CVE-2025-8291 |
suse
|
low | CVE-2025-8291 severity low: SUSE including 631 source package names (0.0.17-1.18:libpython3_11-1_0-3.11.14-150600.3.38.1, 0.0.17-1.18:python311-base-3.11.14-150600.3.38.1, …), 2252 product×package rows across 339 product lines (Container bci/spack, Container containers/lmcache-lmstack-router, … (339 product lines)): Fixed 2007, Known Affected 231, First Fixed 14. | https://www.suse.com/security/cve/CVE-2025-8291/ |
ubuntu
|
medium | CVE-2025-8291 medium priority: Ubuntu including 12 source packages (python2.7, python3.10, …), 72 status rows across 9 suites (bionic, focal, jammy, noble, plucky, questing, trusty, upstream, xenial): DNE 41, needs-triage 16, released 14, ignored 1. | https://ubuntu.com/security/CVE-2025-8291 |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| No affected products in dataset. | |||