CVE-2026-34240 in appsup-dart jose

요약 (영어)

JOSE is a Javascript Object Signing and Encryption (JOSE) library. Prior to version 0.3.5+1, a vulnerability in jose could allow an unauthenticated, remote attacker to forge valid JWS/JWT tokens by using a key embedded in the JOSE header (jwk). The vulnerability exists because key selection could treat header-provided jwk as a verification candidate even when that key was not present in the trusted key store. Since JOSE headers are untrusted input, an attacker could exploit this by creating a token payload, embedding an attacker-controlled public key in the header, and signing with the matching private key. Applications using affected versions for token verification are impacted. This issue has been patched in version 0.3.5+1. A workaround for this issue involves rejecting tokens where header jwk is present unless that jwk matches a key already present in the application's trusted key store.

책임이 있는

GitHub_M

예약하다

2026. 03. 26.

공개

2026. 03. 31.

엔트리

VulDB provides additional information and datapoints for this CVE:

아이디	취약성	CWE	악용	대책	CVE
354436	appsup-dart jose JWS/JWT 약한 인증	347	정의되지 않음	공식 수정	CVE-2026-34240