---
title: "CVE-2026-119283: joserfc - Denial of Service"
description: "joserfc < 1.7.5 contains a denial of service caused by unbounded processing of JWE recipients array in jwe.decrypt_json(), letting unauthenticated attackers exhaust CPU by submitting crafted JWE, exploit requires attacker to submit JWE with multiple recipients."
url: https://panop.io/threat-heartbeat/CVE-2026-119283/
---

# CVE-2026-119283 joserfc - Denial of Service

joserfc < 1.7.5 contains a denial of service caused by unbounded processing of JWE recipients array in jwe.decrypt\_json(), letting unauthenticated attackers exhaust CPU by submitting crafted JWE, exploit requires attacker to submit JWE with multiple recipients.

CVSS base score 7.5 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

EPSS

0.23% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-119283)

## Details

Type

Denial of Service

Impact

Denial Of Service

CVSS vector

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

Published

29 October 2026

Updated

31 October 2026

Weakness

[CWE-400](https://cwe.mitre.org/data/definitions/400.html)

## Vendor fix

Update to version 1.7.5 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-119283](https://nvd.nist.gov/vuln/detail/CVE-2026-119283)
- [https://github.com/authlib/joserfc/commit/d6dc8df6c7609277e741069d3733e43996c1cd17](https://github.com/authlib/joserfc/commit/d6dc8df6c7609277e741069d3733e43996c1cd17)
- [https://github.com/authlib/joserfc/releases/tag/1.7.5](https://github.com/authlib/joserfc/releases/tag/1.7.5)
- [https://github.com/authlib/joserfc/security/advisories/GHSA-jpxq-7h8p-2q76](https://github.com/authlib/joserfc/security/advisories/GHSA-jpxq-7h8p-2q76)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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