5.3
Medium
CVE-2026-81829 A flaw was found in SmallRye JWT's AwsAlbKeyResolver, which is used by applications to verify JSON Web Tokens signed…
Description
A flaw was found in SmallRye JWT's AwsAlbKeyResolver, which is used by applications to verify JSON Web Tokens signed by AWS Application Load Balancers. When the AWS_ALB key provider is configured, the resolver constructs the key-fetch URL by directly concatenating the attacker-controlled kid header value from an inbound JWT without sanitizing path traversal characters or query-string separators. This allows an unauthenticated remote attacker to force the application server to issue GET requests to arbitrary paths on the same origin as the configured key endpoint. As a result, non-public endpoints or internal data reachable on that origin may be read by the attacker before JWT signature verification takes place.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Exploit Intelligence | Versions not published | |
| Red Hat build of Apicurio Registry 3 | Versions not published | |
| Red Hat build of Quarkus | Versions not published | |
| Red Hat JBoss Enterprise Application Platform 8 | Versions not published | |
| Red Hat JBoss Enterprise Application Platform Expansion Pack | Versions not published | |
| Red Hat build of Quarkus 3.27.5.SP2 | Versions not published | |
| Red Hat build of Quarkus 3.33.3.SP2 | Versions not published |
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9.1
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