PyJWT: Non-canonical signature segments enable raw-token revocation bypass

SummaryPyJWT 2.13.0 accepts compact JWS signature segments containing characters thatare not in the Base64URL alphabet. Appending !!!! to a valid signature doesnot change the decoded signature bytes or authenticated claims, but it changesthe serialized token and its SHA-256 hash. An application...

go-jose: Go JOSE's Parsing Vulnerable to Denial of Service

A flaw was found in GO-JOSE. In affected versions, when parsing compact JWS or JWE input, Go JOSE could use excessive memory. The code uses strings.Splittoken, "." to split JWT tokens, which is vulnerable to excessive memory consumption when processing maliciously crafted tokens with a large numb...

CVE-2025-27144

Go JOSE provides an implementation of the Javascript Object Signing and Encryption set of standards in Go, including support for JSON Web Encryption JWE, JSON Web Signature JWS, and JSON Web Token JWT standards. In versions on the 4.x branch prior to version 4.0.5, when parsing compact JWS or JWE...