Browser hang via ng-srcset regex backtracking
Published Feb 10, 2024 · Updated Jul 6, 2026
Regular-expression denial of service in Google AngularJS 1.3.0 through 1.8.3 allows remote attackers to hang browser applications via ng-srcset. The ng-srcset parser splits attacker-controlled source-set text with a backtracking-prone regular expression; long space runs between multiple URLs drive super-linear CPU use. Exploitation requires an application to bind attacker-controlled text to ng-srcset, and the bounded consequence is a hang in the browser context processing that view.
Summary
What happened
Regular-expression denial of service in Google AngularJS 1.3.0 through 1.8.3 allows remote attackers to hang browser applications via ng-srcset. The ng-srcset parser splits attacker-controlled source-set text with a backtracking-prone regular expression; long space runs between multiple URLs drive super-linear CPU use. Exploitation requires an application to bind attacker-controlled text to ng-srcset, and the bounded consequence is a hang in the browser context processing that view.
The record
- CVE
- CVE-2024-21490
- Published
- Feb 10, 2024
- Updated
- Jul 6, 2026
- Vendor
- Product
- AngularJS
- Classifications
- CWE-1333, T1499.004
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Feb 10, 2024CVE publishedPublication date reported by the CVE source.
- Jul 6, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=1.3.0 <*
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
- AngularJS ng-srcset parsing ReDoS proof of conceptproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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