Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
The aiohttp package before 3.14.1 has a flaw in DigestAuthMiddleware, which can send an authentication response after the client follows a cross-origin redirect. An attacker would likely need an open redirect or similar weakness on the target domain, and could then obtain the digest, which exposes the user's credentials only if the cryptography is weak or the password is reused. Upgrade to aiohttp 3.14.1. Alternatively, disable follow_redirects.
Not analysed yet
We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.
Severity and exploitation
| Score | Rating | CVSS | Vector | Source |
|---|---|---|---|---|
| 6.3 | Medium | 4.0 | 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 | CNA (GitHub_M) |
- CISA KEV Not listed.
- EPSS 0.0031, the 23rd percentile, on 11 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 8 Jun 2026, 20:09 UTC Published by the maintainers as a GitHub repository advisory
- 31 Oct 2026, 14:29 UTC First seen by agentprime
- 31 Oct 2026, 14:29 UTC Confirmed by OSV