Medium 5.1Published Apr 20, 2026

CVE-2026-6654Use-After-Free and Double-Free in IntoIter::drop when element drop panics

Updated under an hour ago (Oct 26, 2026, 10:40 PM ET)

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It affects Mozilla thin-vec and 3 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for Mozilla thin-vec

Exploited in the last 30 days

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.

CVSS: 5.1 MEDIUM (v3.1, CISA ADP)CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Weakness (CWE): CWE-415, CWE-416, CWE-1341
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: mozilla
NVD analysis: Modified
Record last updated: Jul 14, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Mozilla thin-vec mozilla:thin_vec (from the name)	from 0.2.16 not affected	CNA record
Red Hat Red Hat Enterprise Linux 10 redhat:enterprise_linux	10	CISA ADP
Red Hat Red Hat Enterprise Linux AI (RHEL AI) 3 redhat:enterprise_linux_ai	3	CISA ADP
mozilla thin-vec mozilla:thin-vec	0.2.15	NVD

References

References

https://github.com/mozilla/thin-vec/security/advisories/GHSA-xphw-cqx3-667j	exploit, vendor-advisory
https://access.redhat.com/security/cve/CVE-2026-6654
https://bugzilla.redhat.com/show_bug.cgi?id=2459689
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-6654.json

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.