CVE-2023-52428: nimbus jose\+jwt DoS — Fix

Description

In Connect2id Nimbus JOSE+JWT before 9.37.2, an attacker can cause a denial of service (resource consumption) via a large JWE p2c header value (aka iteration count) for the PasswordBasedDecrypter (PBKDF2) component.

Is your site exposed to CVE-2023-52428?

Run a free security scan — no signup, results in seconds.

CVSS v3.1 Score

7.5

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness Type (CWE)

CWE-770 CWE-770

Affected Products

Vendor	Product	Versions
connect2id	nimbus_jose\+jwt	< 9.37.2

References

Advisories & Patches

https://bitbucket.org/connect2id/nimbus-jose-jwt/commits/3b3b77e https://bitbucket.org/connect2id/nimbus-jose-jwt/commits/3b3b77e

Other References

https://bitbucket.org/connect2id/nimbus-jose-jwt/issues/526/ https://connect2id.com/products/nimbus-jose-jwt https://bitbucket.org/connect2id/nimbus-jose-jwt/issues/526/ https://connect2id.com/products/nimbus-jose-jwt

Frequently Asked Questions

What is CVE-2023-52428? +

In Connect2id Nimbus JOSE+JWT before 9.37.2, an attacker can cause a denial of service (resource consumption) via a large JWE p2c header value (aka iteration count) for the PasswordBasedDecrypter (PBKDF2) component. It has a CVSS v3.1 base score of 7.5 (HIGH).

How severe is CVE-2023-52428? +

CVE-2023-52428 has a CVSS v3.1 score of 7.5 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2023-52428? +

CVE-2023-52428 affects products from connect2id, specifically: nimbus_jose\+jwt. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2023-52428? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

Related Vulnerabilities

CVE-2026-39313

mcp-framework is a framework for building Model Context Protocol (MCP) servers. In versions 0.2.21 and below, the readRequestBody() function in …

CVE-2026-35469

spdystream is a Go library for multiplexing streams over SPDY connections. In versions 0.5.0 and below, the SPDY/3 frame parser …

CVE-2026-39803

Allocation of Resources Without Limits or Throttling vulnerability in mtrudel bandit allows unauthenticated remote denial of service via memory exhaustion. …

CVE-2026-39804

Allocation of Resources Without Limits or Throttling vulnerability in mtrudel bandit allows unauthenticated remote denial of service via memory exhaustion …

CVE-2026-32688

Allocation of Resources Without Limits or Throttling vulnerability in elixir-plug plug_cowboy allows unauthenticated remote denial of service via atom table …

CVE-2026-10573

A denial-of-service security issue exists in 1734 POINT I/O™ module. The security issue stems from improper handling of crafted CIP …

CVE-2023-52428