Process stall via trailing-whitespace regex backtracking
Published Jun 22, 2023 · Updated Feb 13, 2025
Regular expression denial of service in Jon Schlinkert's word-wrap before 1.2.4 allows attackers to stall consuming applications via crafted text. The trim-option branch applies /[ \t]*$/gm to the generated result, causing excessive backtracking on attacker-controlled text. Exploitation requires a consuming application to pass attacker-controlled input with trim enabled; the package exposes no standalone network service, and the CNA notes that the vulnerable function is not reachable as shipped.
Summary
What happened
Regular expression denial of service in Jon Schlinkert's word-wrap before 1.2.4 allows attackers to stall consuming applications via crafted text. The trim-option branch applies /[ \t]*$/gm to the generated result, causing excessive backtracking on attacker-controlled text. Exploitation requires a consuming application to pass attacker-controlled input with trim enabled; the package exposes no standalone network service, and the CNA notes that the vulnerable function is not reachable as shipped.
The record
- CVE
- CVE-2023-26115
- Published
- Jun 22, 2023
- Updated
- Feb 13, 2025
- Vendor
- Jon Schlinkert
- Product
- word-wrap
- Classifications
- CWE-1333, T1499.003
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jun 22, 2023CVE publishedPublication date reported by the CVE source.
- Feb 13, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=0 <*
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- Snyk word-wrap trim-option proof of conceptproof of concept · unverified
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Technologies
Your stack
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Your stack
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