What’s Vulnerable › Vulnerabilities

CVE-2026-78426: Logout bypass via alternate JWT spelling

• Severity: low (CVSS 2.0 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-17 · updated 2026-09-28
• Weakness: CWE-863

Description

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.

Affected products

• SUSE neuvector: through v5.6.1

References

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

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