Vulnerability Description
Incus 7.0.0 before 7.0.2 and 7.1.0 before 7.5.0 contains a signature verification flaw in its built-in S3 server that allows presigned URL holders to inject unsigned x-amz-* headers. Attackers can add an unsigned X-Amz-Copy-Source header to a presigned upload URL to copy other bucket objects onto the granted key, disclosing their contents and ETags.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://github.com/lxc/incus/security/advisories/GHSA-mmj7-8rgf-mx2h
- https://www.vulncheck.com/advisories/incus-7.0.0-before-7.0.2-and-7.1.0-before-7
FAQ
What is CVE-2026-115374?
CVE-2026-115374 is a vulnerability with a CVSS score of 7.1 (HIGH). Incus 7.0.0 before 7.0.2 and 7.1.0 before 7.5.0 contains a signature verification flaw in its built-in S3 server that allows presigned URL holders to inject unsigned x-amz-* headers. Attackers can add...
How severe is CVE-2026-115374?
CVE-2026-115374 has been rated HIGH with a CVSS base score of 7.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-115374?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.