What’s Vulnerable › Vulnerabilities

CVE-2025-53864

• Severity: medium (CVSS 5.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.0% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-07-11 · updated 2026-06-17
• Weakness: CWE-674

Description

Connect2id Nimbus JOSE + JWT 10.0.x before 10.0.2 and 9.37.x before 9.37.4 allows a remote attacker to cause a denial of service via a deeply nested JSON object supplied in a JWT claim set, because of uncontrolled recursion. NOTE: this is independent of the Gson 2.11.0 issue because the Connect2id product could have checked the JSON object nesting depth, regardless of what limits (if any) were imposed by Gson.

Affected products

• Connect2id Nimbus JOSE+JWT: before 10.0.2 — fixed in 10.0.2

How to fix

Upgrade to a fixed version: Connect2id Nimbus JOSE+JWT 10.0.2. Check the vendor advisory for mitigations.

References

• https://bitbucket.org/connect2id/nimbus-jose-jwt/commits/f7fb882cc08f027c9ceb874acec3b51c6222861c
• https://bitbucket.org/connect2id/nimbus-jose-jwt/issues/583/stackoverflowerror-due-to-deeply-nested
• https://bitbucket.org/connect2id/nimbus-jose-jwt/issues/593/back-port-cve-2025-53864-fix-to-9x-branch
• https://github.com/google/gson/commit/1039427ff0100293dd3cf967a53a55282c0fef6b
• https://github.com/google/gson/compare/gson-parent-2.11.0...gson-parent-2.12.0
• https://bitbucket.org/connect2id/nimbus-jose-jwt/issues/583/stackoverflowerror-due-to-deeply-nested

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