CVE-2023-27530

Name: CVE-2023-27530
Creator: NVD / NIST
Published: 2023-03-10T22:15:10.497+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 1.83%

Last modified Jun 17, 2026

CVE-2023-27530 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. A DoS vulnerability exists in Rack <v3.0.4.2, <v2.2.6.3, <v2.1.4.3 and <v2.0.9.3 within in the Multipart MIME parsing code in which could allow an attacker to craft requests that can be abuse to cause multipart parsing to take longer than expected.. EPSS estimates a 1.83% chance of exploitation in the next 30 days.

Description

A DoS vulnerability exists in Rack <v3.0.4.2, <v2.2.6.3, <v2.1.4.3 and <v2.0.9.3 within in the Multipart MIME parsing code in which could allow an attacker to craft requests that can be abuse to cause multipart parsing to take longer than expected.

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

1.83%

76.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Rack	Rack	< 2.0.9.3
Rack	Rack	>= 2.1.0, < 2.1.4.3
Rack	Rack	>= 2.2.0, < 2.2.6.3
Rack	Rack	>= 3.0.0, < 3.0.4.2
Debian	Debian Linux	10.0
Debian	Debian Linux	11.0

References

https://discuss.rubyonrails.org/t/cve-2023-27530-possible-dos-vulnerability-in-multipart-mime-parsing/82388Patch, Vendor Advisory
https://lists.debian.org/debian-lts-announce/2023/04/msg00017.htmlMailing List, Third Party Advisory
https://security.netapp.com/advisory/ntap-20231208-0015/
https://www.debian.org/security/2023/dsa-5530Third Party Advisory
https://discuss.rubyonrails.org/t/cve-2023-27530-possible-dos-vulnerability-in-multipart-mime-parsing/82388Patch, Vendor Advisory
https://lists.debian.org/debian-lts-announce/2023/04/msg00017.htmlMailing List, Third Party Advisory
https://security.netapp.com/advisory/ntap-20231208-0015/
https://www.debian.org/security/2023/dsa-5530Third Party Advisory

Timeline

Published: Mar 10, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-27530?

How severe is CVE-2023-27530?

CVE-2023-27530 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.83% probability of exploitation in the next 30 days.

How do I fix CVE-2023-27530?

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-2023-27530?

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

Scan your code now

Source: NVD / NIST