CVE-2026-22023Public exploitNetwork attack vector

Process crash via flawed KMC metadata tokenization

Published Jan 10, 2026 · Updated Jan 10, 2026

Out-of-bounds read in CryptoLib before 1.4.3 allows remote attackers to crash KMC-backed AEAD encryption via a crafted JSON response. The cryptography_aead_encrypt() function advances strtok past token terminators while parsing KMC metadata, causing reads beyond heap and stack buffers. Exploitation requires the KMC backend and a malicious or compromised KMC server; the resulting availability impact is a process crash.

CVSS severity8.2
High
EPSS probability0.58%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Out-of-bounds read in CryptoLib before 1.4.3 allows remote attackers to crash KMC-backed AEAD encryption via a crafted JSON response. The cryptography_aead_encrypt() function advances strtok past token terminators while parsing KMC metadata, causing reads beyond heap and stack buffers. Exploitation requires the KMC backend and a malicious or compromised KMC server; the resulting availability impact is a process crash.

The record

CVE
CVE-2026-22023
Published
Jan 10, 2026
Updated
Jan 10, 2026
Vendor
NASA AMMOS
Product
CryptoLib
Classifications
CWE-125, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 10, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 10, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 1.4.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

NASA AMMOS · CryptoLibversion=< 1.4.3

Published CVSS scores

8.2GitHub, Inc.CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-125Out-of-bounds Read
T1499.004Application or System Exploitation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo