CVE-2026-78426

The NeuVector JWT verifier accepts noncanonical Base64URL encodings of the same RSA signature field. An attacker holding a valid JWT that has not expired, but was logged out of NeuVector, can continue using the non-expired token with equivalent spelling of the RSA signature field until the token validity expires.

Score

CVSS 4.0 2.0 Low

Status

Awaiting Analysis - meissner@suse.de

Published

2026-09-17

Last modified

2026-09-28

Weaknesses

CWE-863

Affected products

• Neuvector (Suse)

References

• https://bugzilla.suse.com/show_bug.cgi?id=CVE-2026-78426
• https://github.com/neuvector/neuvector/security/advisories/GHSA-wcx5-mq6c-c54j