CVE-2026-69214Medium· 6.8▾ SunlitHttp4s is a Scala interface for HTTP services. Prior to 0.23.35 and 1.0.0-M47, The CookieJar client middleware stores a response cookie’s Domain attribute without checking that it domain-matches the host that supplied the cookie or rejec…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 37.4 · likelihood 0.1 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.
Exploit-prediction probability, daily snapshots since Sep 19.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
Last analysed / modified upstream
0.3%
Http4s is a Scala interface for HTTP services. Prior to 0.23.35 and 1.0.0-M47, The CookieJar client middleware stores a response cookie’s Domain attribute without checking that it domain-matches the host that supplied the cookie or rejecting public suffixes. A malicious or compromised server contacted through the same CookieJar can plant a cookie for another domain, and the jar later sends that cookie to the victim domain, enabling session fixation or overwriting security-sensitive cookies. The patch validates the Set-Cookie domain against the response origin, although public-suffix rejection remains unimplemented. This issue is fixed in versions 0.23.35 and 1.0.0-M47.
Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Affected packages:
org.http4s:http4s-client_2.12 <= 0.23.34org.http4s:http4s-client_2.13 <= 0.23.34org.http4s:http4s-client_2.13 >= 1.0.0-M1, <= 1.0.0-M46org.http4s:http4s-client_3 >= 1.0.0-M1, <= 1.0.0-M46org.http4s:http4s-client_3 <= 0.23.34Patched in:
org.http4s:http4s-client_2.12 0.23.35org.http4s:http4s-client_2.13 0.23.35org.http4s:http4s-client_2.13 1.0.0-M47org.http4s:http4s-client_3 1.0.0-M47org.http4s:http4s-client_3 0.23.35Connected by shared product, vendor, weakness, or advisory.
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