AIKIDO-2026-158983
guzzlehttp/guzzle is vulnerable to Exposure of Sensitive Information to an Unauthorized Actor
59
Medium Risk
This Affects:
guzzlehttp/guzzleTL;DR
CookieJar does not record whether a response cookie arrived without a Domain attribute (or with an empty one), so a host-only cookie is stored with the request host and later matched with ordinary domain matching. A cookie set by a parent host can therefore be sent to a child host that shares a suffix. The fix records a host-only flag, matches those cookies only against the exact host, and requires an explicit HostOnly marker in persisted jar data.
Who does this affect?
You are affected if you are using a version that falls within the vulnerable range and your application enables Guzzle cookie support with a shared jar that contacts both a parent host and a less-trusted child host.
Background info
guzzlehttp/guzzle is vulnerable to Exposure of Sensitive Information to an Unauthorized Actor in versions 0.0.1 - 7.15.0.
How to fix this
Upgrade the guzzlehttp/guzzle library to the patch version.
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SOC 2Compliant
ISO 27001Compliant