CVE-2026-21899
- Source
- https://cve.org/CVERecord?id=CVE-2026-21899
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-21899.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-21899
- Aliases
-
- GHSA-wc29-5hw7-mpj8
- Published
- 2026-01-10T00:11:18.877Z
- Modified
- 2026-01-17T05:40:53.832418Z
- Severity
-
- 4.7 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L CVSS Calculator
- Summary
- CryptoLib has an out-of-bounds read and crash vulnerability when decoding an empty Base64url string
- Details
-
CryptoLib provides a software-only solution using the CCSDS Space Data Link Security Protocol - Extended Procedures (SDLS-EP) to secure communications between a spacecraft running the core Flight System (cFS) and a ground station. Prior to version 1.4.3, in base64urlDecode, padding-stripping dereferences input[inputLen - 1] before checking that inputLen > 0 or that input != NULL. For inputLen == 0, this becomes an OOB read at input[-1], potentially crashing the process. If input == NULL and inputLen == 0, it dereferences NULL - 1. This issue has been patched in version 1.4.3.
- Database specific
{ "cna_assigner": "GitHub_M", "cwe_ids": [ "CWE-125" ], "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/21xxx/CVE-2026-21899.json" }- References
Affected packages
Git / github.com/nasa/cryptolib
Affected ranges
- Type
- GIT
- Repo
- https://github.com/nasa/cryptolib
- Events
-
Introduced0 Unknown introduced commit / All previous commits are affectedFixed