DEBIAN-CVE-2026-78689
Description NGINX JavaScript (njs) has a vulnerability in the XML module's namespace prefix list parser, reachable through the xml.exclusiveC14n() method. An unauthenticated remote attacker can trigger it when an affected NGINX configuration passes an externally controlled XML namespace prefix list to that method. Both the njs and the QuickJS (qjs) engines are affected. A crafted prefix list causes an out-of-bounds write past the end of a heap allocation. With the njs engine, which is the engine used when the js_engine directive is absent, this corrupts adjacent objects and crashes the NGINX worker. With the QuickJS engine, the same call additionally leaks the prefix list on every invocation, causing worker memory to grow across requests. The official nginxinc/nginx-saml reference implementation is affected during SAML signature verification. It reads InclusiveNamespaces/@PrefixList from an untrusted SAML message and passes it to xml.exclusiveC14n() before the signature has been verified, so a valid SAML signature is not required. A crafted SAML Response, Assertion, LogoutRequest, or LogoutResponse is sufficient. Code execution has not been demonstrated and cannot be ruled out for all platforms, as the effect of the out-of-bounds write depends on conditions beyond the attacker's control. Impact This vulnerability allows remote attackers to cause a denial of service on the NGINX system, either through repeatable worker restarts or through worker memory growth or possibly trigg
DEBIAN-CVE-2026-78689
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-2026-78689
libnginx-mod-js
Source reference: /affected/0/package/name
- Affected versions
- 0.7.12-1
Source reference:
/affected/0/versions0.7.12-2Source reference:
/affected/0/versions0.7.12-2~exp1Source reference:
/affected/0/versions0.7.12-2~exp2Source reference:
/affected/0/versions0.7.9-2Source reference:
/affected/0/versions0.8.0-1Source reference:
/affected/0/versions0.8.1-1Source reference:
/affected/0/versions0.8.2-1Source reference:
/affected/0/versions0.8.4-1Source reference:
/affected/0/versions0.8.5-1Source reference:
/affected/0/versions0.8.9-1Source reference:
/affected/0/versions0.9.1-1Source reference:
/affected/0/versions0.9.4-1Source reference:
/affected/0/versions0.9.6-1Source reference:
/affected/0/versions0.9.8-1Source reference:
/affected/0/versions0.9.9-1Source reference:
/affected/0/versions0.9.9-2Source reference:
/affected/0/versions1.0.0-1Source reference:
/affected/0/versions1.0.0-2Source reference:
/affected/0/versions1.0.0-3Source reference:
/affected/0/versions1.0.0-4Source reference:
/affected/0/versions1.0.1-1Source reference:
/affected/0/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
libnginx-mod-js
Source reference: /affected/1/package/name
- Affected versions
- 0.8.9-1
Source reference:
/affected/1/versions0.9.1-1Source reference:
/affected/1/versions0.9.4-1Source reference:
/affected/1/versions0.9.6-1Source reference:
/affected/1/versions0.9.8-1Source reference:
/affected/1/versions0.9.9-1Source reference:
/affected/1/versions0.9.9-2Source reference:
/affected/1/versions1.0.0-1Source reference:
/affected/1/versions1.0.0-2Source reference:
/affected/1/versions1.0.0-3Source reference:
/affected/1/versions1.0.0-4Source reference:
/affected/1/versions1.0.1-1Source reference:
/affected/1/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
libnginx-mod-js
Source reference: /affected/2/package/name
- Affected versions
- 0.8.9-1
Source reference:
/affected/2/versions0.9.1-1Source reference:
/affected/2/versions0.9.4-1Source reference:
/affected/2/versions0.9.6-1Source reference:
/affected/2/versions0.9.8-1Source reference:
/affected/2/versions0.9.9-1Source reference:
/affected/2/versions0.9.9-2Source reference:
/affected/2/versions1.0.0-1Source reference:
/affected/2/versions1.0.0-2Source reference:
/affected/2/versions1.0.0-3Source reference:
/affected/2/versions1.0.0-4Source reference:
/affected/2/versions - Fixed versions
- 1.0.1-1
Source reference:
/affected/2/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"
}
]
}
],
"package": {
"name": "libnginx-mod-js",
"purl": "pkg:deb/debian/libnginx-mod-js?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"0.7.12-1",
"0.7.12-2",
"0.7.12-2~exp1",
"0.7.12-2~exp2",
"0.7.9-2",
"0.8.0-1",
"0.8.1-1",
"0.8.2-1",
"0.8.4-1",
"0.8.5-1",
"0.8.9-1",
"0.9.1-1",
"0.9.4-1",
"0.9.6-1",
"0.9.8-1",
"0.9.9-1",
"0.9.9-2",
"1.0.0-1",
"1.0.0-2",
"1.0.0-3",
"1.0.0-4",
"1.0.1-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-78689.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "libnginx-mod-js",
"purl": "pkg:deb/debian/libnginx-mod-js?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"0.8.9-1",
"0.9.1-1",
"0.9.4-1",
"0.9.6-1",
"0.9.8-1",
"0.9.9-1",
"0.9.9-2",
"1.0.0-1",
"1.0.0-2",
"1.0.0-3",
"1.0.0-4",
"1.0.1-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-78689.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.0.1-1"
}
]
}
],
"package": {
"name": "libnginx-mod-js",
"purl": "pkg:deb/debian/libnginx-mod-js?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"0.8.9-1",
"0.9.1-1",
"0.9.4-1",
"0.9.6-1",
"0.9.8-1",
"0.9.9-1",
"0.9.9-2",
"1.0.0-1",
"1.0.0-2",
"1.0.0-3",
"1.0.0-4"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-78689.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
]Publisher severity
No explicit severity was provided.
- Event
- #58475 · Revision 1
- Added to Heist Feed
- Publisher date