CVE-2026-69215Medium· 6.8▾ SunlitHttp4s is a Scala interface for HTTP services. Prior to 0.23.35 and 1.0.0-M47, The CookieJar client middleware uses unanchored substring checks instead of RFC 6265 domain and path matching when deciding whether to attach a stored cookie.…
▾ 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
0.4%
Http4s is a Scala interface for HTTP services. Prior to 0.23.35 and 1.0.0-M47, The CookieJar client middleware uses unanchored substring checks instead of RFC 6265 domain and path matching when deciding whether to attach a stored cookie. A cookie for example.com can consequently be sent to an attacker-controlled hostname such as evilexample.com when an application using the same jar makes an attacker-influenced outbound request. This exposes session or authentication cookies and can enable hijacking of the application’s outbound sessions. 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_3 <= 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-M46Patched in:
org.http4s:http4s-client_2.12 0.23.35org.http4s:http4s-client_2.13 0.23.35org.http4s:http4s-client_3 0.23.35org.http4s:http4s-client_2.13 1.0.0-M47org.http4s:http4s-client_3 1.0.0-M47Connected by shared product, vendor, weakness, or advisory.
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