Description
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.
References (5)
Core 5
Core References
Vdb Entry, Technical Description vdb-entry
technical-description
VDB-352327 | pygments archetype.py AdlLexer redos
https://vuldb.com/?id.352327
Signature, Permissions Required signature
permissions-required
VDB-352327 | CTI Indicators (IOB, IOC, TTP, IOA)
https://vuldb.com/?ctiid.352327
Third Party Advisory third-party-advisory
Submit #774685 | pygments <=2.19.2 Denial of Service
https://vuldb.com/?submit.774685
Exploit exploit
issue-tracking
https://github.com/pygments/pygments/issues/3058
Product product
https://github.com/pygments/pygments/
Scores
CVSS v3
3.3
EPSS
0.0016
EPSS Percentile
5.1%
Attack Vector
LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
no
Technical Impact
partial
Details
CWE
CWE-1333
CWE-400
Status
published
Products (4)
n/a/pygments
2.19.0
n/a/pygments
2.19.1
n/a/pygments
2.19.2
pypi/Pygments
0PyPI
Published
Mar 22, 2026
Tracked Since
Mar 22, 2026