CVE Explorer
CVE-2026-21900
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, an out-of-bounds heap read vulnerability in cryptography_encrypt() occurs when parsing JSON metadata from KMC server responses. The flawed strtok iteration pattern uses ptr + strlen(ptr) + 1 which reads one byte past allocated buffer boundaries
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_v5affectedurn:baitaphish:normalized-source-record:v2:04f41743e5c36f53e19a8167c17fc299615816c1b1640908e6e5b4f57e854df4 · sha256:67f6450fab690867… · /containers/cna/affected/0
Provider-owned CVSS observations
1 source assertion{"metric":{"attackComplexity":"LOW","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":8.2,"baseSeverity":"HIGH","privilegesRequired":"NONE","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","vectorString":"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","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE"},"metric_type":"cvssV4_0"}
- cve_program_cvelist_v5cvssurn:baitaphish:normalized-source-record:v2:04f41743e5c36f53e19a8167c17fc299615816c1b1640908e6e5b4f57e854df4 · sha256:67f6450fab690867… · /containers/cna/metrics/0/cvssV4_0
CWE assertions
1 source assertion{"cweId":"CWE-125","description":"CWE-125: Out-of-bounds Read","lang":"en","type":"CWE"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:04f41743e5c36f53e19a8167c17fc299615816c1b1640908e6e5b4f57e854df4 · sha256:67f6450fab690867… · /containers/cna/problemTypes/0/descriptions/0
Source references
4 source assertions{"name":"https://github.com/nasa/CryptoLib/commit/2372efd3da1ccb226b4297222e25f41ecc84821d","tags":["x_refsource_MISC"],"url":"https://github.com/nasa/CryptoLib/commit/2372efd3da1ccb226b4297222e25f41ecc84821d"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:04f41743e5c36f53e19a8167c17fc299615816c1b1640908e6e5b4f57e854df4 · sha256:67f6450fab690867… · /containers/cna/references/1
{"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_v5referenceurn:baitaphish:normalized-source-record:v2:04f41743e5c36f53e19a8167c17fc299615816c1b1640908e6e5b4f57e854df4 · sha256:67f6450fab690867… · /containers/cna/references/2
{"name":"https://github.com/nasa/CryptoLib/security/advisories/GHSA-4g6v-36fv-qcvw","tags":["x_refsource_CONFIRM"],"url":"https://github.com/nasa/CryptoLib/security/advisories/GHSA-4g6v-36fv-qcvw"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:04f41743e5c36f53e19a8167c17fc299615816c1b1640908e6e5b4f57e854df4 · sha256:67f6450fab690867… · /containers/cna/references/0
{"tags":["exploit"],"url":"https://github.com/nasa/CryptoLib/security/advisories/GHSA-4g6v-36fv-qcvw"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:04f41743e5c36f53e19a8167c17fc299615816c1b1640908e6e5b4f57e854df4 · sha256:67f6450fab690867… · /containers/adp/0/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.