DEBIAN-CVE-2026-77638

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Source
https://security-tracker.debian.org/tracker/CVE-2026-77638
Import Source
https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-77638.json
JSON Data
https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-77638
Upstream
Published
2026-08-20T21:17:11Z
Modified
2026-09-17T09:00:14Z
Severity
  • 9.0 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H CVSS Calculator
Summary
[none]
Details

Tor before 0.4.9.11 is prone to a race condition where in just the right circumstances a rendezvous point could man-in-the-middle (impersonate) the onion service that the client was trying to reach.

References

Affected packages

Debian:12 / tor

Package

Name
tor
Purl
pkg:deb/debian/tor?arch=source&distro=bookworm

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
0.4.9.11-0+deb12u1

Affected versions

0.*
0.4.7.13-1
0.4.7.16-1
0.4.8.4-2
0.4.8.5-1
0.4.8.6-1
0.4.8.7-1
0.4.8.8-1
0.4.8.9-1~bpo11+1
0.4.8.9-1~bpo12+1
0.4.8.9-1
0.4.8.10-1~bpo11+1
0.4.8.10-1~bpo12+1
0.4.8.10-1
0.4.8.11-1~bpo11+1
0.4.8.11-1~bpo12+1
0.4.8.11-1
0.4.8.12-1~bpo11+1
0.4.8.12-1~bpo12+1
0.4.8.12-1
0.4.8.12-1.1
0.4.8.13-1
0.4.8.13-2~bpo12+1
0.4.8.13-2
0.4.8.14-1~bpo12+1
0.4.8.14-1
0.4.8.16-1
0.4.8.21-1~bpo12+1
0.4.8.21-1~bpo13+1
0.4.8.21-1~bpo13+2
0.4.8.21-1
0.4.8.22-1~bpo12+1
0.4.8.22-1~bpo13+1
0.4.8.22-1
0.4.9.5-1
0.4.9.5-2~bpo12+1
0.4.9.5-2~bpo13+1
0.4.9.5-2
0.4.9.6-0+deb12u1
0.4.9.6-1~bpo12+1
0.4.9.6-1~bpo13+1
0.4.9.6-1
0.4.9.8-0+deb12u1
0.4.9.8-1~bpo12+1
0.4.9.8-1~bpo13+1
0.4.9.8-1
0.4.9.9-1~bpo13+1
0.4.9.9-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-77638.json"

Debian:13 / tor

Package

Name
tor
Purl
pkg:deb/debian/tor?arch=source&distro=trixie

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
0.4.9.11-0+deb13u1

Affected versions

0.*
0.4.8.16-1
0.4.8.21-1~bpo12+1
0.4.8.21-1~bpo13+1
0.4.8.21-1~bpo13+2
0.4.8.21-1
0.4.8.22-1~bpo12+1
0.4.8.22-1~bpo13+1
0.4.8.22-1
0.4.9.5-1
0.4.9.5-2~bpo12+1
0.4.9.5-2~bpo13+1
0.4.9.5-2
0.4.9.6-0+deb13u1
0.4.9.6-1~bpo12+1
0.4.9.6-1~bpo13+1
0.4.9.6-1
0.4.9.8-0+deb13u1
0.4.9.8-1~bpo12+1
0.4.9.8-1~bpo13+1
0.4.9.8-1
0.4.9.9-1~bpo13+1
0.4.9.9-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-77638.json"

Debian:14 / tor

Package

Name
tor
Purl
pkg:deb/debian/tor?arch=source&distro=forky

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
0.4.9.11-1

Affected versions

0.*
0.4.8.16-1
0.4.8.21-1~bpo12+1
0.4.8.21-1~bpo13+1
0.4.8.21-1~bpo13+2
0.4.8.21-1
0.4.8.22-1~bpo12+1
0.4.8.22-1~bpo13+1
0.4.8.22-1
0.4.9.5-1
0.4.9.5-2~bpo12+1
0.4.9.5-2~bpo13+1
0.4.9.5-2
0.4.9.6-1~bpo12+1
0.4.9.6-1~bpo13+1
0.4.9.6-1
0.4.9.8-1~bpo12+1
0.4.9.8-1~bpo13+1
0.4.9.8-1
0.4.9.9-1~bpo13+1
0.4.9.9-1
0.4.9.11-1~bpo13+1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-77638.json"