ALPINE-CVE-2026-42013
A flaw was found in gnutls. When validating certificates, an oversized Subject Alternative Name (SAN) could cause the validation process to incorrectly fall back to checking the Common Name (CN) field. This could allow a remote attacker to bypass proper certificate validation, potentially leading to spoofing or man-in-the-middle attacks.
ALPINE-CVE-2026-42013
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:ALPINE-CVE-2026-42013
gnutls
Source reference: /affected/0/package/name
- Affected versions
- Not stated in this record
- Fixed versions
- 3.8.13-r0
Source reference:
/affected/0/ranges - Prerequisites
- Not stated in this record
gnutls
Source reference: /affected/1/package/name
- Affected versions
- Not stated in this record
- Fixed versions
- 3.8.13-r0
Source reference:
/affected/1/ranges - Prerequisites
- Not stated in this record
gnutls
Source reference: /affected/2/package/name
- Affected versions
- Not stated in this record
- Fixed versions
- 3.8.13-r0
Source reference:
/affected/2/ranges - Prerequisites
- Not stated in this record
gnutls
Source reference: /affected/3/package/name
- Affected versions
- Not stated in this record
- Fixed versions
- 3.8.13-r0
Source reference:
/affected/3/ranges - Prerequisites
- Not stated in this record
gnutls
Source reference: /affected/4/package/name
- Affected versions
- Not stated in this record
- Fixed versions
- 3.8.13-r0
Source reference:
/affected/4/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": "3.8.13-r0"
}
]
}
],
"package": {
"name": "gnutls",
"purl": "pkg:apk/alpine/gnutls?arch=source",
"ecosystem": "Alpine:v3.20"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2026-42013.json"
},
"ecosystem_specific": {}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "3.8.13-r0"
}
]
}
],
"package": {
"name": "gnutls",
"purl": "pkg:apk/alpine/gnutls?arch=source",
"ecosystem": "Alpine:v3.21"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2026-42013.json"
},
"ecosystem_specific": {}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "3.8.13-r0"
}
]
}
],
"package": {
"name": "gnutls",
"purl": "pkg:apk/alpine/gnutls?arch=source",
"ecosystem": "Alpine:v3.22"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2026-42013.json"
},
"ecosystem_specific": {}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "3.8.13-r0"
}
]
}
],
"package": {
"name": "gnutls",
"purl": "pkg:apk/alpine/gnutls?arch=source",
"ecosystem": "Alpine:v3.23"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2026-42013.json"
},
"ecosystem_specific": {}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "3.8.13-r0"
}
]
}
],
"package": {
"name": "gnutls",
"purl": "pkg:apk/alpine/gnutls?arch=source",
"ecosystem": "Alpine:v3.24"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2026-42013.json"
},
"ecosystem_specific": {}
}
]Publisher severity
No explicit severity was provided.
- Event
- #54371 · Revision 1
- Added to Heist Feed
- Publisher date