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vuln-cve/data/2026/21xxx/CVE-2026-21899.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-21899",
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"state": "PUBLISHED",
"assignerShortName": "GitHub_M",
"dateReserved": "2026-01-05T17:24:36.931Z",
"datePublished": "2026-01-10T00:11:18.877Z",
"dateUpdated": "2026-01-12T20:23:08.304Z"
},
"containers": {
"cna": {
"title": "CryptoLib has an out-of-bounds read and crash vulnerability when decoding an empty Base64url string",
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-125",
"lang": "en",
"description": "CWE-125: Out-of-bounds Read",
"type": "CWE"
}
]
}
],
"metrics": [
{
"cvssV3_1": {
"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"
}
}
],
"references": [
{
"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"
},
{
"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"
}
],
"affected": [
{
"vendor": "nasa",
"product": "CryptoLib",
"versions": [
{
"version": "< 1.4.3",
"status": "affected"
}
]
}
],
"providerMetadata": {
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M",
"dateUpdated": "2026-01-10T00:11:18.877Z"
},
"descriptions": [
{
"lang": "en",
"value": "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."
}
],
"source": {
"advisory": "GHSA-wc29-5hw7-mpj8",
"discovery": "UNKNOWN"
}
},
"adp": [
{
"metrics": [
{
"other": {
"type": "ssvc",
"content": {
"timestamp": "2026-01-12T20:22:54.955002Z",
"id": "CVE-2026-21899",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"version": "2.0.3"
}
}
}
],
"title": "CISA ADP Vulnrichment",
"providerMetadata": {
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP",
"dateUpdated": "2026-01-12T20:23:08.304Z"
}
}
]
}
}