CVE-2026-107279 AsyncHttpClient: Digest mutual authentication is switched off by a peer offering qop=auth-int
Attackers can bypass Digest mutual authentication in AsyncHttpClient by offering qop=auth-int, allowing impersonation of the server.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-107279?
CVE-2026-107279 is a high-severity authentication bypass vulnerability in AsyncHttpClient async-http-client, published on 7 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The AsyncHttpClient (AHC) library allows Java applications to easily execute HTTP requests and asynchronously process HTTP responses. In 3.0.12, a peer offering only Digest qop=auth-int causes mutual-authentication verification to be skipped. AuthenticatorUtils.computeExpectedRspAuth returns no expected value for auth-int, and Interceptors treats that result as unverifiable but nonfatal, so a response with an invalid rspauth value is accepted. A peer that does not know the shared secret can therefore be accepted as the authenticated server. This issue is fixed in version 3.0.13.
Which versions are affected by CVE-2026-107279?
How do I fix CVE-2026-107279?
No fix has been published for CVE-2026-107279 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-107279 being exploited?
There is no known exploitation of CVE-2026-107279 in the wild and no public exploit code.
Sources
Also known as GHSA-qhv6-3pmh-95q4, UBUNTU-CVE-2026-107279.