GHSA-hpj7-wq8m-9hgp

aiohttp: DigestAuthMiddleware Applies Credentials to Cross-Origin Redirect Challenges

At a glance

Published
Updated
CVE
CVE-2026-54276
Aliases
PYSEC-2026-2109
CVSS_V4
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

Description

### Summary ``DigestAuthMiddleware`` can send an authentication response after following a cross-origin redirect. ### Impact If the client follows a redirect (the default option) to an attacker controlled domain, the attacker may be able to extract the auth digest. This likely requires an open redirect vulnerability or similar on the target domain for an attacker to be able to execute. Further, the attacker is only receiving the digest, so should only be able to extract the user's credentials if the cryptography is weak or there is some kind of password reuse. ### Workaround Disable ``follow_redirects`` if this is a concern. ----- Patch: https://github.com/aio-libs/aiohttp/commit/38d16060037e1bfcd6d677abababa3c2a4bb58fa

Affected packages

PackageVersions
PyPI · aiohttpintroduced 0, fixed 3.14.1

References

Sources

SourceLicence
OSV.devCC-BY 4.0 — GitHub Advisory Database