CVE-2026-81829Smallrye-jwt: quarkus-smallrye-jwt: smallrye-jwt: unauthenticated same-origin ssrf via unsanitized jwt kid header in awsalbkeyresolver
Descripción
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.
Datos: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Se publican tal como los indican las fuentes, en inglés.
Productos y versiones afectados
| Fabricante | Producto | Versiones | |
|---|---|---|---|
| quarkus | 3.27 | — | |
| quarkus | 3.33 | — | |
| Red Hat | Exploit Intelligence | all versions | |
| Red Hat | Red Hat build of Apicurio Registry 3 | all versions | |
| Red Hat | Red Hat build of Quarkus | all versions | |
| Red Hat | Red Hat build of Quarkus 3.27.5.SP2 | — | |
| Red Hat | Red Hat build of Quarkus 3.33.3.SP2 | — | |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8 | all versions | |
| Red Hat | Red Hat JBoss Enterprise Application Platform Expansion Pack | all versions |
Referencias y parches
- RHSA-2026:69440 vendor-advisory
- RHSA-2026:69470 vendor-advisory
- https://access.redhat.com/security/cve/CVE-2026-81829 vdb-entry
- RHBZ#2524980 issue-tracking