DEBIAN-CVE-2026-91769

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Source
https://security-tracker.debian.org/tracker/CVE-2026-91769
Import Source
https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-91769.json
JSON Data
https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-91769
Upstream
  • CVE-2026-91769
Published
2026-09-25T21:17:24Z
Modified
2026-10-11T17:01:29Z
Severity
  • 4.3 (Medium) CVSS_V3 - CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N CVSS Calculator
Summary
[none]
Details

PHP's OpenSSL stream peer verification checks the certificate's subjectAltName entries first and, whenever no entry matches, falls back to the Common Name. RFC 6125 requires the CN to be ignored once the certificate presents any service identity, so a certificate carrying a non-matching DNS SAN was still accepted when its CN matched the requested peer_name. A certificate trusted by the client for one name can therefore be used to impersonate another.

References

Affected packages

Debian:12 / php8.2

Package

Name
php8.2
Purl
pkg:deb/debian/php8.2?arch=source&distro=bookworm

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
8.2.34-1~deb12u1

Affected versions

8.*
8.2.5-2
8.2.7-1~deb12u1
8.2.7-1
8.2.7-1.1
8.2.7-1.2
8.2.10-1
8.2.10-2
8.2.12-1
8.2.16-1
8.2.16-2
8.2.17-1
8.2.18-1~deb12u1
8.2.18-1
8.2.20-1~deb12u1
8.2.20-2
8.2.20-3
8.2.21-1
8.2.23-1
8.2.24-1~deb12u1
8.2.24-1
8.2.26-1~deb12u1
8.2.26-4
8.2.27-1
8.2.28-1~deb12u1
8.2.29-1~deb12u1
8.2.30-1~deb12u1
8.2.31-1~deb12u1
8.2.32-1~deb12u1
8.2.33-1~deb12u1

Ecosystem specific 

{
    "urgency":  "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-91769.json"

Debian:13 / php8.4

Package

Name
php8.4
Purl
pkg:deb/debian/php8.4?arch=source&distro=trixie

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
8.4.26-1~deb13u1

Affected versions

8.*
8.4.11-1
8.4.16-1~deb13u1
8.4.16-1
8.4.20-1
8.4.21-1~deb13u1
8.4.21-1
8.4.22-1
8.4.23-1~deb13u1
8.4.23-1
8.4.24-1~deb13u1
8.4.24-1

Ecosystem specific 

{
    "urgency":  "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-91769.json"

Debian:14 / php8.4

Package

Name
php8.4
Purl
pkg:deb/debian/php8.4?arch=source&distro=forky

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
8.4.26-1

Affected versions

8.*
8.4.11-1
8.4.16-1~deb13u1
8.4.16-1
8.4.20-1
8.4.21-1~deb13u1
8.4.21-1
8.4.22-1
8.4.23-1~deb13u1
8.4.23-1
8.4.24-1~deb13u1
8.4.24-1
8.4.26-1~deb13u1

Ecosystem specific 

{
    "urgency":  "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-91769.json"