CVE-2026-82378 Apache Roller: OAuth authorization endpoint trusts request-supplied identity
Unauthenticated attackers can bind OAuth tokens to arbitrary admin accounts if site-wide consumers are configured, requiring an upgrade to fix.
- 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-2026-82378?
CVE-2026-82378 is a critical authentication bypass vulnerability in Apache Roller, published on 28 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Incorrect Authorization in the OAuth 1.0a authorization endpoint of Apache Roller 6.1.5 allows an unauthenticated remote attacker who learns an outstanding request token for a configured site-wide consumer to bind that token to an arbitrary user account, including an administrator, by submitting an unsigned authorization request. The endpoint derives the authorizing identity from a request-supplied value rather than the authenticated session. Only installations that configure an OAuth 1.0a site-wide consumer are affected, and exploitation requires knowledge of one of its outstanding request tokens. Users are recommended to upgrade to Apache Roller 6.1.6 or later, which binds authorization to the logged-in session.
Weakness: CWE-863
Which versions are affected by CVE-2026-82378?
How do I fix CVE-2026-82378?
No fix has been published for CVE-2026-82378 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-2026-82378 being exploited?
There is no known exploitation of CVE-2026-82378 in the wild and no public exploit code.
Sources
Also known as GHSA-c34v-mgwv-92x6.