Is CVE-2024-53861 actively exploited?

CVE-2024-53861 has no public evidence of in-the-wild exploitation as of 2025-09-22.

What is the CVSS score for CVE-2024-53861?

CVE-2024-53861 has a CVSS score of 2.2 (LOW severity). Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:L/A:N.

How do I patch CVE-2024-53861?

Patch guidance is available from pyjwt project security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2024-53861.

Which products are affected by CVE-2024-53861?

1 product: pyjwt project pyjwt.

CVE-2024-53861 - remediation guidance & executive summary

Description

pyjwt is a JSON Web Token implementation in Python. An incorrect string comparison is run for `iss` checking, resulting in `"acb"` being accepted for `"_abc_"`. This is a bug introduced in version 2.10.0: checking the "iss" claim changed from `isinstance(issuer, list)` to `isinstance(issuer, Sequence)`. Since str is a Sequnce, but not a list, `in` is also used for string comparison. 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. This issue has been patched in version 2.10.1. All users are advised to upgrade. There are no known workarounds for this vulnerability.

CVSS Metrics

Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:L/A:N
Attack Vector: network
Complexity: high
Privileges: high
User Action: none
Scope: unchanged
Confidentiality: none
Integrity: low
Availability: none
Weaknesses: CWE-697

Metadata

Primary Vendor: PYJWT_PROJECT
Published: 11/29/2024
Last Modified: 9/22/2025
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

Affected Products

pyjwt_project : pyjwt

Remediation Guidance

Executive Summary

Cite this page

CVE-2024-53861. CVEDatabase.com. Retrieved 1 May 2026. https://cvedatabase.com/cve/CVE-2024-53861

View on NIST NVD

CVE-2024-53861 vulnerability