Vulnerability in Mozilla Thin Vec (CVE-2026-6654)
Summary
Vulnerability in Mozilla Thin Vec (CVE-2026-6654). Risk of unauthorized operations or information disclosure.
Original description
The description as published by the source.
Double-Free / Use-After-Free (UAF) in the IntoIter::drop and ThinVec::clear functions in the thin_vec crate. A panic in ptr::drop_in_place skips setting the length to zero.
Source: NIST National Vulnerability Database NVD
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2026-6654 has been found in Mozilla Thin Vec.
Risk of unauthorized operations or information disclosure. CVSS score: 5.1/10.
What to do: apply the vendor's official patched release.
If unsure, ask your IT team or search "Mozilla Thin Vec CVE-2026-6654" on the vendor's site.
CVE-2026-6654 (Mozilla Thin Vec) — CWE-415 / CVSS v3 5.1
Attack vector: local / unauthenticated / no user interaction
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
A vulnerability (CWE-415) exists in Mozilla Thin Vec.
Check the vendor advisory for the affected versions of Mozilla Thin Vec.
Severity: Medium (CVSS 5.1/10). Risk of unauthorized operations or information disclosure.
Update to the patched release per vendor advisory.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Audit SBOM/dependencies to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
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1Identify exposure identify
Audit SBOM/dependencies for affected components.資産台帳・SBOM・依存マニフェストで Mozilla Thin Vec を使っているサービスとバージョンを洗い出す。
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2Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。
Fix status by distribution
Fixed packages published by each distribution for this CVE
- Debian DEBIAN-CVE-2026-6654 rust-thin-vec
- Ubuntu UBUNTU-CVE-2026-6654 rust-thin-vec
References
- exploit security@mozilla.org
- web access.redhat.com
- web bugzilla.redhat.com
- web security.access.redhat.com