fast-jwt provides fast JSON Web Token (JWT) implementation. From 0.0.1 to before 6.2.0, setting up a custom cacheKeyBuilder method which does not properly create unique keys for different tokens can lead to cache collisions. This could cause tokens to be mis-identified during the verification process leading to valid tokens returning claims from different valid tokens and users being mis-identified as other users based on the wrong token. Version 6.2.0 contains a patch.
{
"cna_assigner": "GitHub_M",
"cwe_ids": [
"CWE-1289",
"CWE-345",
"CWE-706"
],
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/35xxx/CVE-2026-35039.json"
}{
"extracted_events": [
{
"cpe": "cpe:2.3:a:nearform:fast-jwt:*:*:*:*:*:node.js:*:*",
"range": [
{
"introduced": "0.1.0"
},
{
"fixed": "6.1.0"
}
],
"source": "CPE_RANGE"
},
{
"range": [
{
"fixed": "de121056c6415b58770c60640881eaec67ac4ceb"
}
],
"source": "REFERENCES_COMMIT"
}
]
}