HighFix available
mediawiki — security advisory
Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Wikimedia Foundation OATHAuth. This issue affects OATHAuth: from * before 1.43.7, 1.44.4, 1.45.2.
- Products
- mediawiki
- Affected versions
- 1:1.39.10-1, 1:1.39.10-1~deb12u1, 1:1.39.12-1~deb12u1, 1:1.39.13-1~deb12u1, 1:1.39.17-1~deb12u1, 1:1.39.2-1, 1:1.39.4-1, 1:1.39.4-1~deb12u1, 1:1.39.4-2, 1:1.39.5-1, 1:1.39.5-1~deb12u1, 1:1.39.6-1, 1:1.39.7-1, 1:1.39.7-1~deb12u1, 1:1.39.8-1, 1:1.43.3+dfsg-1, 1:1.43.5+dfsg-1, 1:1.43.6+dfsg-1, 1:1.43.6+dfsg-1~deb13u1, 1:1.43.6+dfsg-2, 1:1.43.8+dfsg-1~deb13u1
- Fixed versions
- 1:1.39.17-1+deb12u2, 1:1.43.8+dfsg-1, 1:1.43.8+dfsg-1~deb13u1
- CVEs
- CVE-2026-34087
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 17:51 UTC · Revision 2
Source evidence
Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Wikimedia Foundation OATHAuth. This issue affects OATHAuth: from * before 1.43.7, 1.44.4, 1.45.2.
osv:DEBIAN-CVE-2026-34087
mediawiki
Fixed versions: 1:1.39.17-1+deb12u2
mediawiki
Fixed versions: 1:1.43.8+dfsg-1~deb13u1
mediawiki
Fixed versions: 1:1.43.8+dfsg-1
Complete source record
{
"id": "09a6f4ac1c24ac3b311df32c398f04f9475a56c955d043320d7578f9ca2cbd10",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2026-34087",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2026-34087",
"summary": "Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Wikimedia Foundation OATHAuth. This issue affects OATHAuth: from * before 1.43.7, 1.44.4, 1.45.2.",
"evidence": "osv:DEBIAN-CVE-2026-34087",
"products": [
{
"name": {
"value": "mediawiki",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1:1.39.17-1+deb12u2",
"evidence": "/affected/0/ranges"
}
],
"affected_versions": [
{
"value": "1:1.39.10-1",
"evidence": "/affected/0/versions"
},
{
"value": "1:1.39.10-1~deb12u1",
"evidence": "/affected/0/versions"
},
{
"value": "1:1.39.12-1~deb12u1",
"evidence": "/affected/0/versions"
},
{
"value": "1:1.39.13-1~deb12u1",
"evidence": "/affected/0/versions"
},
{
"value": "1:1.39.17-1~deb12u1",
"evidence": "/affected/0/versions"
},
{
"value": "1:1.39.2-1",
"evidence": "/affected/0/versions"
},
{
"value": "1:1.39.4-1",
"evidence": "/affected/0/versions"
},
{
"value": "1:1.39.4-1~deb12u1",
"evidence": "/affected/0/versions"
},
{
"value": "1:1.39.4-2",
"evidence": "/affected/0/versions"
},
{
"value": "1:1.39.5-1",
"evidence": "/affected/0/versions"
},
{
"value": "1:1.39.5-1~deb12u1",
"evidence": "/affected/0/versions"
},
{
"value": "1:1.39.6-1",
"evidence": "/affected/0/versions"
},
{
"value": "1:1.39.7-1",
"evidence": "/affected/0/versions"
},
{
"value": "1:1.39.7-1~deb12u1",
"evidence": "/affected/0/versions"
},
{
"value": "1:1.39.8-1",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "mediawiki",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1:1.43.8+dfsg-1~deb13u1",
"evidence": "/affected/1/ranges"
}
],
"affected_versions": [
{
"value": "1:1.43.3+dfsg-1",
"evidence": "/affected/1/versions"
},
{
"value": "1:1.43.5+dfsg-1",
"evidence": "/affected/1/versions"
},
{
"value": "1:1.43.6+dfsg-1",
"evidence": "/affected/1/versions"
},
{
"value": "1:1.43.6+dfsg-1~deb13u1",
"evidence": "/affected/1/versions"
},
{
"value": "1:1.43.6+dfsg-2",
"evidence": "/affected/1/versions"
}
]
},
{
"name": {
"value": "mediawiki",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1:1.43.8+dfsg-1",
"evidence": "/affected/2/ranges"
}
],
"affected_versions": [
{
"value": "1:1.43.3+dfsg-1",
"evidence": "/affected/2/versions"
},
{
"value": "1:1.43.5+dfsg-1",
"evidence": "/affected/2/versions"
},
{
"value": "1:1.43.6+dfsg-1",
"evidence": "/affected/2/versions"
},
{
"value": "1:1.43.6+dfsg-1~deb13u1",
"evidence": "/affected/2/versions"
},
{
"value": "1:1.43.6+dfsg-2",
"evidence": "/affected/2/versions"
},
{
"value": "1:1.43.8+dfsg-1~deb13u1",
"evidence": "/affected/2/versions"
}
]
}
],
"severity": "high",
"structured": {
"id": "DEBIAN-CVE-2026-34087",
"aliases": [
"DEBIAN-CVE-2026-34087"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1:1.39.17-1+deb12u2"
}
]
}
],
"package": {
"name": "mediawiki",
"purl": "pkg:deb/debian/mediawiki?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"1:1.39.10-1",
"1:1.39.10-1~deb12u1",
"1:1.39.12-1~deb12u1",
"1:1.39.13-1~deb12u1",
"1:1.39.17-1~deb12u1",
"1:1.39.2-1",
"1:1.39.4-1",
"1:1.39.4-1~deb12u1",
"1:1.39.4-2",
"1:1.39.5-1",
"1:1.39.5-1~deb12u1",
"1:1.39.6-1",
"1:1.39.7-1",
"1:1.39.7-1~deb12u1",
"1:1.39.8-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-34087.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1:1.43.8+dfsg-1~deb13u1"
}
]
}
],
"package": {
"name": "mediawiki",
"purl": "pkg:deb/debian/mediawiki?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"1:1.43.3+dfsg-1",
"1:1.43.5+dfsg-1",
"1:1.43.6+dfsg-1",
"1:1.43.6+dfsg-1~deb13u1",
"1:1.43.6+dfsg-2"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-34087.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1:1.43.8+dfsg-1"
}
]
}
],
"package": {
"name": "mediawiki",
"purl": "pkg:deb/debian/mediawiki?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"1:1.43.3+dfsg-1",
"1:1.43.5+dfsg-1",
"1:1.43.6+dfsg-1",
"1:1.43.6+dfsg-1~deb13u1",
"1:1.43.6+dfsg-2",
"1:1.43.8+dfsg-1~deb13u1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-34087.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
],
"modified": "2026-10-27T09:47:43.388940683Z",
"provider": "osv",
"upstream": [
"CVE-2026-34087"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2026-34087"
]
},
"related_cves": [
{
"value": "CVE-2026-34087",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 461367,
"published_at": "2026-05-11T16:17:30.023+00:00"
}