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Fencer Intel
high 7.5

CVE-2015-9239 json

Regular Expression Denial of Service in ansi2html

published 2018-05-31 8 y ago modified 2026-06-17 4 mo ago also GHSA-c2v2-7rcg-2ch7 , EUVD-2020-0958

cvss
7.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.1%
EPSS 1.1% chance of exploitation in 30 days, percentile 66%
public exploits
0
none known

Summary

ansi2html is vulnerable to regular expression denial of service (ReDoS) when certain types of user input is passed in.

Exploit prediction

1.13% chance of exploitation in the next 30 days, higher than 66% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • nodesecurity.io https://nodesecurity.io/advisories/51 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:N/A:P

Affected packages

ecosystem package affected fixed in
npm ansi2html
>=0.0.0
no fix listed

Affected products

  • HackerOne ansi2html node module

Classification

Weakness
  • CWE-400 Uncontrolled Resource Consumption
  • CWE-20 Improper Input Validation

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.