CVE-2026-78426

Logout bypass via alternate JWT spelling

Published Sep 17, 2026 CVSS 4.0 · 2 Low EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics cvssV3_1

{'score': 3.7, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:N'}

Type Values Removed Values Added
First Time appeared Suse
Suse neuvector
CPEs cpe:2.3:a:suse:neuvector:*:*:*:*:*:*:*:*
Vendors & Products Suse
Suse neuvector
Metrics cvssV4_0

{'score': 2, 'vector': 'CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N'}

Type Values Removed Values Added
First Time appeared Go
Go neuvector
Vendors & Products Go
Go neuvector
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
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.
Title Logout bypass via alternate JWT spelling
Weaknesses CWE-863
References
Metrics cvssV3_1

{'score': 3.7, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
suse
Published
Updated
Sep 28, 2026, 12:03 PM
Reserved
Aug 24, 2026, 3:33 PM
Status
Awaiting Analysis
Published
Sep 17, 2026, 10:17 AM
Modified
Sep 28, 2026, 1:17 PM