CVE-2026-77642
published 2026-08-20CVE-2026-77642: 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…
PriorityP339high7.5CVSS 3.1
AVNACHPRNUINSCCNILAH
EPSS
0.19%
9.1th percentile
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.
Affected
2 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| torproject | tor | < 0.4.9.9 | 0.4.9.9 |
| torproject | tor | >= 0.2.8.2-alpha < 0.4.9.9 | 0.4.9.9 |
Stop checking back — get the weekly exploitation signal.
Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2026-77642 tor: Tor: Denial of Service via out-of-bounds write in signature parsing [epel-all]
bugzilla·2026-08-22·CVSS 7.5
CVE-2026-77642 [HIGH] CVE-2026-77642 tor: Tor: Denial of Service via out-of-bounds write in signature parsing [epel-all]
CVE-2026-77642 tor: Tor: Denial of Service via out-of-bounds write in signature parsing [epel-all]
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
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.
Bugzilla
CVE-2026-77642 tor: Tor: Denial of Service via out-of-bounds write in signature parsing [fedora-all]
bugzilla·2026-08-22·CVSS 7.5
CVE-2026-77642 [HIGH] CVE-2026-77642 tor: Tor: Denial of Service via out-of-bounds write in signature parsing [fedora-all]
CVE-2026-77642 tor: Tor: Denial of Service via out-of-bounds write in signature parsing [fedora-all]
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
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.
Bugzilla
CVE-2026-77642 tor: Tor: Denial of Service via out-of-bounds write in signature parsing
bugzilla·2026-08-20·CVSS 7.5
CVE-2026-77642 [HIGH] CVE-2026-77642 tor: Tor: Denial of Service via out-of-bounds write in signature parsing
CVE-2026-77642 tor: Tor: Denial of Service via out-of-bounds write in signature parsing
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.
2026-08-20
Published