---
id: CVE-2024-53861
title: 'pyjwt: Issuer field partial matches allowed in pyjwt (CVE-2024-53861)'
summary: >-
  A flaw was found in the pyJWT package. An incorrect string comparison is run
  for `iss` checking, which allows for partial matches. This results in `if
  "abc" not in "__abcd__":` being checked instead of `if "abc" != "__abc__":`.
  Signature c…
severity: low
cvss: 2.2
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:L'
cvssSource: vendor
cwe: CWE-697
vendor: Red Hat
product: pyjwt
affected:
  - 'pyjwt >= 2.10.0, < 2.10.1'
patched:
  - pyjwt 2.10.1
published: '2024-11-29'
updated: '2026-10-14'
sourceUpdated: '2026-10-14T05:06:59+00:00'
source: CSAF
sourceUrl: 'https://security.access.redhat.com/data/csaf/v2/vex/2024/cve-2024-53861.json'
references:
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2024/cve-2024-53861.json
  - url: 'https://access.redhat.com/security/cve/CVE-2024-53861'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2329527'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2024-53861'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2024-53861'
  - url: >-
      https://github.com/jpadilla/pyjwt/commit/1570e708672aa9036bc772476beae8bfa48f4131#diff-6893ad4a1c5a36b8af3028db8c8bc3b62418149843fc382faf901eaab008e380R366
  - url: >-
      https://github.com/jpadilla/pyjwt/commit/33022c25525c1020869c71ce2a4109e44ae4ced1
  - url: 'https://github.com/jpadilla/pyjwt/security/advisories/GHSA-75c5-xw7c-p5pm'
  - url: 'https://github.com/jpadilla/pyjwt'
tags:
  - csaf
  - vex
  - red-hat
  - osv
  - pip
epss: 0.00832
epssPercentile: 0.57413
aliases:
  - GHSA-75c5-xw7c-p5pm
  - PYSEC-2026-1814
ecosystem: pip
ingestedAt: '2026-07-08T18:25:46.765Z'
---

## Overview

A flaw was found in the pyJWT package. An incorrect string comparison is run for `iss` checking, which allows for partial matches. This results in `if "abc" not in "__abcd__":` being checked instead of `if "abc" != "__abc__":`. Signature checks are still present so real world impact is likely limited to denial of service scenarios.

## Vendor advisories

- **Red Hat VEX** · Low · updated 2026-10-14 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2024/cve-2024-53861.json)

**pyjwt: Issuer field partial matches allowed in pyjwt** — rated Low by Red Hat. Released 2024-11-29, updated 2026-10-14.

Not affected:

- OpenShift Lightspeed
- Red Hat Ansible Automation Platform 1.2
- Red Hat Ansible Automation Platform 2
- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 9
- Red Hat Quay 3
- Red Hat Satellite 6
- Red Hat Update Infrastructure 4 for Cloud Providers

## Remediation

Refer to the advisory for fix availability.

## Package advisory (CVE-2024-53861)

Affected packages:

- `pyjwt >= 2.10.0, < 2.10.1`

Patched in:

- `pyjwt 2.10.1`

Source: https://osv.dev/vulnerability/GHSA-75c5-xw7c-p5pm