CVE-2026-89315

The record

`JwtClaims.MarshalJSON` built a Go struct at runtime with `reflect.StructOf`, synthesising a field named `"A" + claimName` for each untyped claim. `reflect.StructOf` **panics** when a field name is not a valid Go identifier, or when it duplicates another field. Both conditions are reachable from ordinary JWT claim names.

Affected packages

Related vulnerabilities

• CVE-2026-63341 Aedes is an MQTT broker that can run on any stream server. CWE-248
• CVE-2026-119188 Forge (also called node-forge) is a native implementation of Transport Layer Security in… CWE-248
• CVE-2026-119052 llama.cpp b2877 before b11935 contains an uncaught exception vulnerability in the… CWE-248
• CVE-2026-111107 A NULL pointer dereference vulnerability in WatchGuard Fireware OS’s management interface… CWE-248
• CVE-2026-117541 svg-sanitizer from 0.11.0 before 1.1.0 contains an uncaught exception vulnerability that… CWE-248
• CVE-2026-116589 Datadog dd-trace-py is the Datadog Python APM client. CWE-248
• CVE-2026-115892 Wasmtime is a runtime for WebAssembly. CWE-248
• CVE-2026-89318 `JweRsaKeyEncryptionDecryptorImpl.Decrypt` passed the JWE's initialization vector to… CWE-248