PT-2026-49590 · Pypi · Aiohttp

Published 2026-06-15 · Updated 2026-06-15 · CVE-2026-54276

OSV

CVSS v4.0

6.3

Medium

Base vector

AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

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

Fix

Insufficiently Protected Credentials

Information Disclosure

Weakness Enumeration

CWE-522

CWE-200

Related Identifiers

CVE-2026-54276

GHSA-HPJ7-WQ8M-9HGP

Affected Products

Aiohttp

References · 4

• https://osv.dev/vulnerability/GHSA-hpj7-wq8m-9hgp · Vendor Advisory
• https://github.com/aio-libs/aiohttp · Note
• https://github.com/aio-libs/aiohttp/commit/38d16060037e1bfcd6d677abababa3c2a4bb58fa · Note
• https://github.com/aio-libs/aiohttp/security/advisories/GHSA-hpj7-wq8m-9hgp · Note