aiohttp: Host-Only Cookies Become Domain Cookies After CookieJar Persistence

When

2026-06-15 20:08 UTC

Where

Global (internet)

Category

cyber_advisory · pip

### Summary Host-only cookies that are saved with ``CookieJar.save()`` and then restored later with ``CookieJar.load()`` lose their host-only status. ### Impact Host-only cookies that have been loaded from disk may get sent to subdomains that previously should have been disallowed. ----- Patch: https://github.com/aio-libs/aiohttp/commit/a329a7aacad5284f087af36103aff778746da0f2

Sources

• GitHub Advisory Database ↗ · first seen 2026-06-15 20:08 UTC

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Correlated events

Computed by the Defaxon correlation engine — linked by shared actors, co-location, and temporal proximity. Scored hypotheses, never causal claims.

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