Uncaught Exception Affecting github.com/go-jose/go-jose/v3 package, versions <3.0.5
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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- published3 Apr 2026
- disclosed3 Apr 2026
- creditDatadog Security team
Introduced: 3 Apr 2026
CVE-2026-34986 (opens in a new tab)How to fix?
Upgrade github.com/go-jose/go-jose/v3 to version 3.0.5 or higher.
Overview
Affected versions of this package are vulnerable to Uncaught Exception in the cipher.KeyUnwrap function when decrypting a JSON Web Encryption (JWE) object with a key wrapping algorithm (ending in 'KW', except for 'A128GCMKW', 'A192GCMKW', and 'A256GCMKW') and the encrypted_key field is empty. An attacker can cause a panic and disrupt service by submitting a crafted JWE object with an empty encrypted_key field or by directly invoking cipher.KeyUnwrap with a ciphertext parameter less than 16 bytes long.
Note:
This is only exploitable if the list of accepted key algorithms includes key wrapping algorithms.
Workaround
This vulnerability can be mitigated by prevalidating JWE objects to ensure the encrypted_key field is nonempty, or by excluding key wrapping algorithms from the list of accepted key algorithms.