CVE WatchJul 31, 2026

CVE-2025-8291

The 'zipfile' module would not check the validity of the ZIP64 End of Central Directory (EOCD) Locator record offset value would not be used

CVSS

4.3

Medium

EPSS

0.4%

p32

KEV

—

Exploit Today

0-100

Published: Oct 7, 2025 · Last modified: Jul 31, 2026 · CWE-1285

EPSS · 30d

0.4%EPSS · 30 days0.4%

2026-08-232026-09-20

Technical description

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.

Official references

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