Description
tor before 0.4.9.9 was prone to an out-of-bounds write when parsing a consensus or detached signature with unexpected signature digest type. Impact is minor for most Tor roles, but potentially major for directory authorities. This is TROVE-2026-019.
Published: 2026-08-20
Score: 7.5 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Thu, 27 Aug 2026 17:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Fri, 21 Aug 2026 01:15:00 +0000

Type Values Removed Values Added
Title Out‑Of‑Bounds Write During Consensus or Detached Signature Parsing in Tor

Thu, 20 Aug 2026 21:30:00 +0000

Type Values Removed Values Added
Description tor before 0.4.9.9 was prone to an out-of-bounds write when parsing a consensus or detached signature with unexpected signature digest type. Impact is minor for most Tor roles, but potentially major for directory authorities. This is TROVE-2026-019.
First Time appeared Torproject
Torproject tor
Weaknesses CWE-787
CPEs cpe:2.3:a:torproject:tor:*:*:*:*:*:*:*:*
Vendors & Products Torproject
Torproject tor
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:H'}

Subscriptions

Torproject Tor
cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2026-08-27T16:07:03.716Z

Reserved: 2026-08-20T21:15:49.322Z

Link: CVE-2026-77642

cve-icon Vulnrichment

Updated: 2026-08-27T16:03:23.055Z

cve-icon NVD

Status : Received

Published: 2026-08-20T22:18:06.070

Modified: 2026-08-27T17:20:26.220

Link: CVE-2026-77642

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-21T01:00:04Z

Weaknesses