What’s Vulnerable › Vulnerabilities

CVE-2026-35172: Distribution has stale blob access resurrection via repo-scoped redis descriptor cache invalidation

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-04-06 · updated 2026-09-09
• Weakness: CWE-284

Description

Distribution is a toolkit to pack, ship, store, and deliver container content. Prior to 3.1.0, distribution can restore read access in repo a after an explicit delete when storage.cache.blobdescriptor: redis and storage.delete.enabled: true are both enabled. The delete path clears the shared digest descriptor but leaves stale repo-scoped membership behind, so a later Stat or Get from repo b repopulates the shared descriptor and makes the deleted blob readable from repo a again. This vulnerability is fixed in 3.1.0.

Affected products

• distribution: before 3.1.0 — fixed in 3.1.0

How to fix

Upgrade to a fixed version: distribution 3.1.0. Check the vendor advisory for mitigations.

References

• https://github.com/distribution/distribution/security/advisories/GHSA-f2g3-hh2r-cwgc
• https://access.redhat.com/errata/RHSA-2026:23234
• https://access.redhat.com/errata/RHSA-2026:25045
• https://access.redhat.com/errata/RHSA-2026:26529
• https://access.redhat.com/errata/RHSA-2026:26543
• https://access.redhat.com/errata/RHSA-2026:28893
• https://access.redhat.com/errata/RHSA-2026:37387
• https://access.redhat.com/security/cve/CVE-2026-35172
• https://bugzilla.redhat.com/show_bug.cgi?id=2455571
• https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-35172.json

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