Ignore unrelated, unauthenticated hashes in Lookup in golang.org/x/mod/sumdb
Description
A vulnerability identified as CVE-2026-56864 affects the golang.org/x/mod/sumdb component, related to ignoring unrelated, unauthenticated hashes in Lookup. The issue is associated with Microsoft products and Alpine ecosystem components. A patch is available to address this vulnerability.
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-56864 is a vulnerability in the golang.org/x/mod/sumdb module where unrelated, unauthenticated hashes are ignored during Lookup operations. This behavior can lead to security concerns as indicated by the CWE-347 classification (Improper Verification of Cryptographic Signature). The vulnerability affects versions including =2.3.4-r2 and versions prior to it, as well as related Microsoft and Alpine ecosystem products. Microsoft has provided a patch to remediate this issue.
Potential Impact
The vulnerability involves improper verification of cryptographic signatures, which could undermine the integrity checks performed by the sumdb module. This may allow attackers to bypass certain security checks related to module verification. No known exploits are reported in the wild at this time.
Mitigation Recommendations
A patch is available for this vulnerability. Users and administrators should apply the official fix provided by Microsoft or the relevant maintainers of the golang.org/x/mod/sumdb module to remediate the issue. No additional mitigation steps are indicated by the vendor advisory.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- CLEANSTART-2026-KP99907
- Osv Schema Version
- 1.7.3
- Ecosystems
- ["Alpine"]
- State
- PUBLISHED
Threat ID: 6a984559acd9273b496ab7b3
Added to database: 09/02/2026, 15:48:41 UTC
Last enriched: 09/07/2026, 22:53:50 UTC
Last updated: 10/15/2026, 18:48:21 UTC
Views: 24
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