High severity7.5NVD Advisory· Published Mar 17, 2021· Updated Jun 17, 2026
CVE-2021-27292
CVE-2021-27292
Description
ua-parser-js >= 0.7.14, fixed in 0.7.24, uses a regular expression which is vulnerable to denial of service. If an attacker sends a malicious User-Agent header, ua-parser-js will get stuck processing it for an extended period of time.
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Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
ua-parser-jsnpm | >= 0.7.14, < 0.7.24 | 0.7.24 |
Affected products
2- ua-parser-js/ua-parser-jsdescription
Patches
Vulnerability mechanics
References
5- github.com/faisalman/ua-parser-js/commit/809439e20e273ce0d25c1d04e111dcf6011eb566nvdPatchThird Party AdvisoryWEB
- github.com/pygments/pygments/commit/2e7e8c4a7b318f4032493773732754e418279a14nvdPatchThird Party AdvisoryWEB
- gist.github.com/b-c-ds/6941d80d6b4e694df4bc269493b7be76nvdExploitThird Party AdvisoryWEB
- github.com/advisories/GHSA-78cj-fxph-m83pghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2021-27292ghsaADVISORY
News mentions
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