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CVE-2026-21899

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 inpu
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:8fbc20645a89d69cf2ba3995320b95dedaa229f1a4c28688e510fb493cb965f6
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"product":"CryptoLib","vendor":"nasa","versions":[{"status":"affected","version":"< 1.4.3"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:48485ba126c13ff94d5e0e4b5704ab5d7bce59df39f8b48c5bef7d459d0229d0 · sha256:4bec4d5b82e181b3… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":4.7,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"HIGH","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:48485ba126c13ff94d5e0e4b5704ab5d7bce59df39f8b48c5bef7d459d0229d0 · sha256:4bec4d5b82e181b3… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-125","description":"CWE-125: Out-of-bounds Read","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:48485ba126c13ff94d5e0e4b5704ab5d7bce59df39f8b48c5bef7d459d0229d0 · sha256:4bec4d5b82e181b3… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions
{"name":"https://github.com/nasa/CryptoLib/releases/tag/v1.4.3","tags":["x_refsource_MISC"],"url":"https://github.com/nasa/CryptoLib/releases/tag/v1.4.3"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:48485ba126c13ff94d5e0e4b5704ab5d7bce59df39f8b48c5bef7d459d0229d0 · sha256:4bec4d5b82e181b3… · /containers/cna/references/1
{"name":"https://github.com/nasa/CryptoLib/security/advisories/GHSA-wc29-5hw7-mpj8","tags":["x_refsource_CONFIRM"],"url":"https://github.com/nasa/CryptoLib/security/advisories/GHSA-wc29-5hw7-mpj8"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:48485ba126c13ff94d5e0e4b5704ab5d7bce59df39f8b48c5bef7d459d0229d0 · sha256:4bec4d5b82e181b3… · /containers/cna/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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