Review reviewHigh

CVE-2026-34986

go-jose go-jose, Cryostat 4 on RHEL 9, Red Hat Enterprise Linux 10

Go JOSE provides an implementation of the Javascript Object Signing and Encryption set of standards in Go, including support for JSON Web Encryption (JWE), JSON Web Signature (JWS), and JSON Web Token (JWT) standards. Prior to 4.1.4 and 3.0.5, decrypting a JSON Web Encryption (JWE) object will panic if the alg field indicates a key wrapping algorithm (one ending in KW, with the exception of A128GCMKW, A192GCMKW, and A256GCMKW) and the encrypted_key field is empty. The panic happens when cipher.KeyUnwrap() in key_wrap.go attempts to allocate a slice with a zero or negative length based on th...

CVSS: 7.5
EPSS: 0.65%
CISA KEV: Not listed
Published: 2026.04.07

PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV

Exploit probability0.65%

Technical severityCVSS 7.5

Vulnerability overview

Affected product and versions

Product: go-jose go-jose, Cryostat 4 on RHEL 9, Red Hat Enterprise Linux 10
Affected versions: >= >= 4.0.0, < 4.1.4, >= < 3.0.5, >= 3.0.0 < 3.0.5, >= 4.0.0 < 4.1.4
Fixed versions: 3.0.5, 4.1.4

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide

1
Identify
Confirm that go-jose go-jose, Cryostat 4 on RHEL 9, Red Hat Enterprise Linux 10 and an affected version are present.
2
Prioritize
Combine exploitation signals with asset exposure and business criticality.
3
Remediate
Follow the vendor advisory or supported update path and preserve rollback options.
4
Verify
Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE: CWE-131, CWE-248