CVE-2017-18077 — index

index.js in brace-expansion before 1.1.7 is vulnerable to Regular Expression Denial of Service (ReDoS) attacks, as demonstrated by an expand argument containing many comma characters.

01What is this vulnerability?

index.js in brace-expansion before 1.1.7 is vulnerable to Regular Expression Denial of Service (ReDoS) attacks, as demonstrated by an expand argument containing many comma characters.

02Affected products

Vendor	Product	Versions
n	a / n/a	n/a

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2018-01-27T12:00:00.000Z
• Last modified: 2024-09-17T00:56:19.603Z

09References

• github.com — https://github.com/juliangruber/brace-expansion/pull/35/commits/b13381281cead487…
• nodesecurity.io — https://nodesecurity.io/advisories/338
• github.com — https://github.com/juliangruber/brace-expansion/issues/33
• bugs.debian.org — https://bugs.debian.org/862712