Vulnerability · Published Jun 22, 2026 · Assigned by GitHub_M
CVE-2026-54276AIOHTTP: DigestAuthMiddleware Applies Credentials to Cross-Origin Redirect Challenges
Medium 6.3
In plain English
A medium-severity information exposure in aiohttp from aio-libs. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 24% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to 3.14.1, DigestAuthMiddleware can send an authentication response after following a cross-origin redirect. 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. This vulnerability is fixed in 3.14.1.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:14 | python-aiohttp | 3.14.1-1 | DEBIAN-CVE-2026-54276 |
| PyPI | aiohttp | 3.14.1 | GHSA-hpj7-wq8m-9hgp |
| PyPI | aiohttp | 3.14.1 | PYSEC-2026-2109 |
| Ubuntu:25.10 | python-aiohttp | no fix listed | UBUNTU-CVE-2026-54276 |
| Ubuntu:26.10 | python-aiohttp | no fix listed | UBUNTU-CVE-2026-54276 |
Affected products (as reported)
Weakness: CWE-200, CWE-522 · Vector: 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