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Vulnerability record · CVE-2026-64623 · published 20 July 2026

CVE-2026-64623: Improper verification of cryptographic signature vulnerability

Network-AI before 5.13.4 contains an improper cryptographic signature verification vulnerability in APSAdapter where the default local verifier accepts any non-empty string as valid. Unauthenticated attackers can submit forged APS delegation payloads with arbitrary scopes to bypass signature verification and obtain signed permission-grant tokens for sensitive resources including SHELL_EXEC.

8.8 CVSS 4.0 High EPSS 0.28% · top 81.9% CWE-347 · Improper verification of cryptographic signature Deferred
8.8CVSS 4.0 base score
0.28%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
3References
23 Jul 2026Last modified by NVD

Description

Network-AI before 5.13.4 contains an improper cryptographic signature verification vulnerability in APSAdapter where the default local verifier accepts any non-empty string as valid. Unauthenticated attackers can submit forged APS delegation payloads with arbitrary scopes to bypass signature verification and obtain signed permission-grant tokens for sensitive resources including SHELL_EXEC.

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

LinkTags
https://github.com/Jovancoding/Network-AI/security/advisories/GHSA-3jf7-33vc-hgf4
https://www.vulncheck.com/advisories/network-ai-before-cryptographic-signature-verification-bypass
https://github.com/Jovancoding/Network-AI/security/advisories/GHSA-3jf7-33vc-hgf4

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Source: NIST National Vulnerability Database (record CVE-2026-64623), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.