Improper Authentication Affecting github.com/ory/oathkeeper/pipeline/authn package, versions <26.2.0
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Start learning- Snyk IDSNYK-GOLANG-GITHUBCOMORYOATHKEEPERPIPELINEAUTHN-15762326
- published24 Mar 2026
- disclosed23 Mar 2026
- creditUnknown
Introduced: 23 Mar 2026
CVE-2026-33496 Â (opens in a new tab)How to fix?
Upgrade github.com/ory/oathkeeper/pipeline/authn to version 26.2.0 or higher.
Overview
Affected versions of this package are vulnerable to Improper Authentication due to cache key confusion. An attacker can gain unauthorized access by using a token to prime the cache, and subsequently use the same token for rules that use a different introspection server.
Note:
This is only exploitable if all the following conditions are met:
The application is configured with multiple
oauth2_introspectionauthenticator servers, each accepting different tokens;The authenticators are configured to use caching;
An attacker has a way to gain a valid token for one of the configured introspection servers.