CVE-2026-35172

Distribution has stale blob access resurrection via repo-scoped redis descriptor cache invalidation

HIGH
7.5
CVSS Score
Published: April 6, 2026 at 07:08 PM UTC
Updated: September 9, 2026 at 01:19 PM UTC
3 products affected across 2 vendorsDistributionOpenShift Container PlatformMulticluster Engine for Kubernetes

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Severity
HIGH7.5
Exploit prediction
EPSS 0.5%
SSVC
PoC

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 3.1.0
Affected range stops below 3.1.0, so it looks safe — our inference, not a vendor statement
Vendor states this is fixed in 1779915499 (unaffected)
Vendor states this is fixed in 1780957268 (unaffected)
Vendor states this is fixed in 1781122773 (unaffected)
Vendor states this is fixed in 1781123052 (unaffected)
Vendor states this is fixed in 1781833795 (unaffected)
Vendor states this is fixed in 4 (unaffected)
Vendor states this is fixed in 4 (unknown)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (10)

x_refsource_CONFIRMExploitVendor Advisory
Source: cverecord
https://github.com/distribution/distribution/security/advisories/GHSA-f2g3-hh2r-cwgc
Source: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
https://access.redhat.com/errata/RHSA-2026:23234
Source: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
https://access.redhat.com/errata/RHSA-2026:25045
Source: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
https://access.redhat.com/errata/RHSA-2026:26529
Source: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
https://access.redhat.com/errata/RHSA-2026:26543
Source: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
https://access.redhat.com/security/cve/CVE-2026-35172
Source: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
https://bugzilla.redhat.com/show_bug.cgi?id=2455571

SSVC — Action Prioritization

SSVCPoCAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.5HIGHGitHub_M
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-284NVD-CWE-noinfoCWE-524

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