High severity · published Jul 20, 2026
CVE-2026-64623
Network-AI before 5.13.4 Cryptographic Signature Verification Bypass
8.6
CVSS
0.3%
EPSS
No
On KEV
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 vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
High
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 17% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
NE
Network-AI · Jovancoding
before 5.13.4 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-64623
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-64623
github.com
https://github.com/Jovancoding/Network-AI/security/advisories/GHSA-3jf7-33vc-hgf4
www.vulncheck.com
https://www.vulncheck.com/advisories/network-ai-before-cryptographic-signature-verification-bypass
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