DEBIAN-CVE-2026-4539
A security flaw has been discovered in pygments up to 2.19.2. The impacted element is the function AdlLexer of the file pygments/lexers/archetype.py. The manipulation results in inefficient regular expression complexity. The attack is only possible with local access. The exploit has been released to the public and may be used for attacks. The project was informed of the problem early through an issue report but has not responded yet.
DEBIAN-CVE-2026-4539
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-2026-4539
pygments
Source reference: /affected/0/package/name
- Affected versions
- 2.14.0+dfsg-1
Source reference:
/affected/0/versions2.15.0+dfsg-1Source reference:
/affected/0/versions2.15.1+dfsg-1Source reference:
/affected/0/versions2.17.2+dfsg-1Source reference:
/affected/0/versions2.18.0+dfsg-1Source reference:
/affected/0/versions2.18.0+dfsg-2Source reference:
/affected/0/versions2.19.2+dfsg-1Source reference:
/affected/0/versions2.20.0+dfsg-1Source reference:
/affected/0/versions2.20.0+dfsg-2Source reference:
/affected/0/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
pygments
Source reference: /affected/1/package/name
- Affected versions
- 2.18.0+dfsg-2
Source reference:
/affected/1/versions2.19.2+dfsg-1Source reference:
/affected/1/versions2.20.0+dfsg-1Source reference:
/affected/1/versions2.20.0+dfsg-2Source reference:
/affected/1/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
pygments
Source reference: /affected/2/package/name
- Affected versions
- 2.18.0+dfsg-2
Source reference:
/affected/2/versions2.19.2+dfsg-1Source reference:
/affected/2/versions - Fixed versions
- 2.20.0+dfsg-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": "pygments",
"purl": "pkg:deb/debian/pygments?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"2.14.0+dfsg-1",
"2.15.0+dfsg-1",
"2.15.1+dfsg-1",
"2.17.2+dfsg-1",
"2.18.0+dfsg-1",
"2.18.0+dfsg-2",
"2.19.2+dfsg-1",
"2.20.0+dfsg-1",
"2.20.0+dfsg-2"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-4539.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "pygments",
"purl": "pkg:deb/debian/pygments?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"2.18.0+dfsg-2",
"2.19.2+dfsg-1",
"2.20.0+dfsg-1",
"2.20.0+dfsg-2"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-4539.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.20.0+dfsg-1"
}
]
}
],
"package": {
"name": "pygments",
"purl": "pkg:deb/debian/pygments?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"2.18.0+dfsg-2",
"2.19.2+dfsg-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-4539.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
]Publisher severity
No explicit severity was provided.
- Event
- #57118 · Revision 1
- Added to Heist Feed
- Publisher date