Paper/Archive/CVE-2026-44603

CVE-2026-44603

torproject Tor — Tor before 0.4.9.7 has an out-of-bounds read by one byte via a malformed BEGIN cell, aka TROVE-2026-007.

EPSS 0.3%CVSS 9.1

critical.is priorityof 100

33

CVSS 9.1 (NVD)9.1 / 10 × 3027.3 Not in CISA KEV+300.0 EPSS percentile 27.7.277 × 205.5 No public exploit+100.0 SSVC exploitation: none+100.0

Description · from the CVE record

Tor before 0.4.9.7 has an out-of-bounds read by one byte via a malformed BEGIN cell, aka TROVE-2026-007.

Affected

ProductAffectedFixed inSource

Tor< 0.4.9.70.4.9.7CNA

Scores by source

NVD9.1CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

mitre (CNA)3.7CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L

CISA ADPSSVCExploitation: none · Automatable: no · Technical impact: partial

References

refforum.torproject.org/c/news/tor-release-announcement/28 refopenwall.com/lists/oss-security/2026/05/06/8 refgitlab.torproject.org/tpo/core/tor/-/work_items/41245 refgitlab.torproject.org/tpo/core/tor/-/commit/1703df3d439c83c2184e259fad1cfa19240f9c89