What is CVE-2026-54276?

CVE-2026-54276 is a medium-severity vulnerability in Aiohttp, classified under Information Disclosure. CVSS score: 6.1/10. Published 2026-06-22.

How severe is CVE-2026-54276?

Medium severity. CVSS v3 base score is 6.1 out of 10.

Open Redirect in Aiohttp

CVE-2026-54276

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 vulner…

Vulnerability class: Information Disclosure

EPSS: 0.002 (7.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

Affected products

Aiohttp
Aio-libs Aiohttp — versions < 3.14.1

Weakness classification (CWE)

References

security-advisories@github.com (x_refsource_CONFIRM, Vendor Advisory)
security-advisories@github.com (Patch, x_refsource_MISC)

Frequently asked questions

What is CVE-2026-54276?: CVE-2026-54276 is a medium-severity vulnerability in Aiohttp, classified under Information Disclosure. CVSS score: 6.1/10. Published 2026-06-22.
How severe is CVE-2026-54276?: Medium severity. CVSS v3 base score is 6.1 out of 10.