CVE-2025-63811: jose2go is vulnerable to a JWT bomb attack through its decode function

November 12, 2025 (updated November 14, 2025)

An issue was discovered in dvsekhvalnov jose2go 1.5.0 thru 1.7.0 allowing an attacker to cause a Denial-of-Service (DoS) via crafted JSON Web Encryption (JWE) token with an exceptionally high compression ratio.

References

github.com/advisories/GHSA-9mj6-hxhv-w67j
github.com/dvsekhvalnov/jose2go
github.com/dvsekhvalnov/jose2go/commit/0a0673dd7f2820a446de5b04b9094b2291d77d5d
github.com/dvsekhvalnov/jose2go/issues/33
nvd.nist.gov/vuln/detail/CVE-2025-63811

Code Behaviors & Features

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