VulnerabilityAnalyzed
CVE-2026-44597
Tor before 0.4.9.7 has an out-of-bounds read when an END, a TRUNCATE, or a TRUNCATED cell lacks a reason in its payload, aka TROVE-2026-011.
CRITICAL 9.1EPSS 0.45%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.45%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
Tor before 0.4.9.7 has an out-of-bounds read when an END, a TRUNCATE, or a TRUNCATED cell lacks a reason in its payload, aka TROVE-2026-011.
- CVSS 3.1
- 9.1 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
- EPSS
- 0.45% probability · 38th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-684
- Affected
- torproject/tor
- Source
- cve@mitre.org
References
- https://forum.torproject.org/c/news/tor-release-announcement/28Release Notes
- https://gitlab.torproject.org/tpo/core/tor/-/commit/8f98054b1982d00a14639864d03e9afd90b87481Patch
- https://gitlab.torproject.org/tpo/core/tor/-/work_items/41254Broken Link
- https://www.openwall.com/lists/oss-security/2026/05/06/8Mailing List, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.