DEBIAN-CVE-2026-32144
Improper Certificate Validation vulnerability in Erlang OTP public_key (pubkey_ocsp module) allows OCSP designated-responder authorization bypass via missing signature verification. The OCSP response validation in public_key:pkix_ocsp_validate/5 does not verify that a CA-designated responder certificate was cryptographically signed by the issuing CA. Instead, it only checks that the responder certificate's issuer name matches the CA's subject name and that the certificate has the OCSPSigning extended key usage. An attacker who can intercept or control OCSP responses can create a self-signed certificate with a matching issuer name and the OCSPSigning EKU, and use it to forge OCSP responses that mark revoked certificates as valid. This affects SSL/TLS clients using OCSP stapling, which may accept connections to servers with revoked certificates, potentially transmitting sensitive data to compromised servers. Applications using the public_key:pkix_ocsp_validate/5 API directly are also affected, with impact depending on usage context. This vulnerability is associated with program files lib/public_key/src/pubkey_ocsp.erl and program routines pubkey_ocsp:is_authorized_responder/3. This issue affects OTP from OTP 27.0 before OTP 28.4.2 and OTP 27.3.4.10, corresponding to public_key from 1.16 before 1.20.3 and 1.17.1.2, and ssl from 11.2 before 11.5.4 and 11.2.12.7.
DEBIAN-CVE-2026-32144
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: osv:DEBIAN-CVE-2026-32144
erlang
Source reference: /affected/0/package/name
- Affected versions
- 1:27.3.4.1+dfsg-1
Source reference:
/affected/0/versions1:27.3.4.1+dfsg-1+deb13u1Source reference:
/affected/0/versions1:27.3.4.1+dfsg-1+deb13u2Source reference:
/affected/0/versions - Fixed versions
- 1:27.3.4.1+dfsg-1+deb13u3
Source reference:
/affected/0/ranges - Prerequisites
- Not stated in this record
erlang
Source reference: /affected/1/package/name
- Affected versions
- 1:27.3.4.1+dfsg-1
Source reference:
/affected/1/versions1:27.3.4.3+dfsg-1Source reference:
/affected/1/versions1:27.3.4.4+dfsg-1Source reference:
/affected/1/versions1:27.3.4.6+dfsg-1Source reference:
/affected/1/versions1:27.3.4.8+dfsg-1Source reference:
/affected/1/versions1:27.3.4.9+dfsg-1Source reference:
/affected/1/versions - Fixed versions
- 1:27.3.4.10+dfsg-1
Source reference:
/affected/1/ranges - Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1:27.3.4.1+dfsg-1+deb13u3"
}
]
}
],
"package": {
"name": "erlang",
"purl": "pkg:deb/debian/erlang?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"1:27.3.4.1+dfsg-1",
"1:27.3.4.1+dfsg-1+deb13u1",
"1:27.3.4.1+dfsg-1+deb13u2"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-32144.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1:27.3.4.10+dfsg-1"
}
]
}
],
"package": {
"name": "erlang",
"purl": "pkg:deb/debian/erlang?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"1:27.3.4.1+dfsg-1",
"1:27.3.4.3+dfsg-1",
"1:27.3.4.4+dfsg-1",
"1:27.3.4.6+dfsg-1",
"1:27.3.4.8+dfsg-1",
"1:27.3.4.9+dfsg-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-32144.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
]Publisher severity
No explicit severity was provided.
- Event
- #57501 · Revision 1
- Added to Heist Feed
- Publisher date