CVE-2024-34535

Name: CVE-2024-34535
Creator: NVD / NIST
Published: 2024-10-03T18:15:04.693+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.9/10EPSS 0.37%

Last modified Jun 17, 2026

CVE-2024-34535 is a medium-severity vulnerability rated 5.9/10 on the CVSS scale. In Mastodon 4.1.6, API endpoint rate limiting can be bypassed by setting a crafted HTTP request header.. EPSS estimates a 0.37% chance of exploitation in the next 30 days.

Description

In Mastodon 4.1.6, API endpoint rate limiting can be bypassed by setting a crafted HTTP request header.

Metrics

CVSS 3.1

5.9/10

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

EPSS Probability

0.37%

28.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-444

Affected Software

Vendor	Product	Versions
Joinmastodon	Mastodon	<= 4.1.16
Joinmastodon	Mastodon	>= 4.2.0, <= 4.2.8

References

https://github.com/mastodon/mastodon/security/advisories/GHSA-q3rg-xx5v-4mxhThird Party Advisory
https://github.com/mastodon/mastodon/tagsRelease Notes

Timeline

Published: Oct 3, 2024
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2024-34535?

In Mastodon 4.1.6, API endpoint rate limiting can be bypassed by setting a crafted HTTP request header.

How severe is CVE-2024-34535?

CVE-2024-34535 has a CVSS score of 5.9/10 (MEDIUM severity). The EPSS model estimates a 0.37% probability of exploitation in the next 30 days.

How do I fix CVE-2024-34535?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2024-34535?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST