MEDIUMPyPI →
Pygments has Regular Expression Denial of Service (ReDoS) due to Inefficient Regex for GUID Matching
Pygments has Regular Expression Denial of Service (ReDoS) due to Inefficient Regex for GUID Matching
Affected packages
- pygments— before 2.20.0
Exploit signal
- Known exploited (CISA KEV)
- No
- EPSS score
- —
- EPSS percentile
- —
EPSS is the probability a CVE is exploited in the wild; percentile is its rank among all CVEs.
Sources
- https://nvd.nist.gov/vuln/detail/CVE-2026-4539
- https://github.com/pygments/pygments/issues/3058
- https://github.com/pygments/pygments/pull/3064
- https://github.com/pygments/pygments/commit/24b8aa76c6cd6d70f39c6dd605cce319c98e2ccc
- https://github.com/pygments/pygments
- https://github.com/pygments/pygments/releases/tag/2.20.0
- https://vuldb.com/?ctiid.352327
- https://vuldb.com/?id.352327
- https://vuldb.com/?submit.774685
Structured record: https://osv.dev/vulnerability/GHSA-5239-wwwm-4pmq
Recommended response stack
Snyk — Scan your dependencies in CI and fix this vulnerability.→Socket — Detect malicious and compromised packages before they ship.→
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