XSRF token disclosure via boolean coercion
Published Apr 24, 2026 · Updated Apr 24, 2026
Information disclosure in Axios before 0.31.1 and 1.0.0 through 1.15.0 allows remote attackers to steal XSRF tokens via cross-origin requests. The condition in lib/helpers/resolveConfig.js treats any truthy withXSRFToken value as explicit opt-in and skips isURLSameOrigin before adding the cookie value to request headers. Exploitation requires a browser application with an XSRF cookie and either prototype pollution or a truthy non-boolean configuration value; the leaked anti-CSRF token enables forged requests but not session hijacking.
Summary
What happened
Information disclosure in Axios before 0.31.1 and 1.0.0 through 1.15.0 allows remote attackers to steal XSRF tokens via cross-origin requests. The condition in lib/helpers/resolveConfig.js treats any truthy withXSRFToken value as explicit opt-in and skips isURLSameOrigin before adding the cookie value to request headers. Exploitation requires a browser application with an XSRF cookie and either prototype pollution or a truthy non-boolean configuration value; the leaked anti-CSRF token enables forged requests but not session hijacking.
The record
- CVE
- CVE-2026-42042
- Published
- Apr 24, 2026
- Updated
- Apr 24, 2026
- Vendor
- Axios
- Product
- Axios
- Classifications
- CWE-201, CWE-183, T1185
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Apr 24, 2026CVE publishedPublication date reported by the CVE source.
- Apr 24, 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=< 0.31.1
- Affected versionversion=>= 1.0.0, < 1.15.1
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
- GitHub advisory browser proof of conceptproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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