Cookie injection via unchecked Set-Cookie domains
Published May 25, 2022 · Updated Apr 23, 2025
Cookie validation failure in Guzzle before 6.5.6 and 7.0.0 through 7.4.2 allows remote attackers to inject cookies via crafted HTTP responses. CookieJar::extractCookies stores each Set-Cookie Domain attribute without checking SetCookie::matchesDomain against the response host, placing unrelated-domain cookies in the shared jar. Exploitation requires enabled cookie middleware, one client used across domains, and a request to a malicious server; injected cookies can expose later private API traffic or alter authenticated state.
Summary
What happened
Cookie validation failure in Guzzle before 6.5.6 and 7.0.0 through 7.4.2 allows remote attackers to inject cookies via crafted HTTP responses. CookieJar::extractCookies stores each Set-Cookie Domain attribute without checking SetCookie::matchesDomain against the response host, placing unrelated-domain cookies in the shared jar. Exploitation requires enabled cookie middleware, one client used across domains, and a request to a malicious server; injected cookies can expose later private API traffic or alter authenticated state.
The record
- CVE
- CVE-2022-29248
- Published
- May 25, 2022
- Updated
- Apr 23, 2025
- Vendor
- Guzzle
- Product
- Guzzle
- Classifications
- CWE-200, CWE-565
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- May 25, 2022CVE publishedPublication date reported by the CVE source.
- Apr 23, 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?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=< 6.5.6
- Affected versionversion=>= 7.0.0, < 7.4.3
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
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Technologies
Your stack
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Your stack
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