CVE-2022-30780

Name: CVE-2022-30780
Creator: NVD / NIST
Published: 2022-06-11T15:15:08.807+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 56.42%

Last modified Jun 17, 2026

CVE-2022-30780 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. Lighttpd 1.4.56 through 1.4.58 allows a remote attacker to cause a denial of service (CPU consumption from stuck connections) because connection_read_header_more in connections.c has a typo that disrupts use of multiple read operations on large headers.. EPSS estimates a 56.42% chance of exploitation in the next 30 days.

Description

Lighttpd 1.4.56 through 1.4.58 allows a remote attacker to cause a denial of service (CPU consumption from stuck connections) because connection_read_header_more in connections.c has a typo that disrupts use of multiple read operations on large headers.

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

56.42%

98.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-682

Affected Software

Vendor	Product	Versions
Lighttpd	Lighttpd	1.4.56
Lighttpd	Lighttpd	1.4.57
Lighttpd	Lighttpd	1.4.58

References

https://github.com/lighttpd/lighttpd1.4Product, Third Party Advisory
https://github.com/p0dalirius/CVE-2022-30780-lighttpd-denial-of-serviceExploit, Third Party Advisory
https://podalirius.net/en/cves/2022-30780/Exploit, Third Party Advisory
https://redmine.lighttpd.net/issues/3059Issue Tracking, Patch, Vendor Advisory
https://github.com/lighttpd/lighttpd1.4Product, Third Party Advisory
https://github.com/p0dalirius/CVE-2022-30780-lighttpd-denial-of-serviceExploit, Third Party Advisory
https://podalirius.net/en/cves/2022-30780/Exploit, Third Party Advisory
https://redmine.lighttpd.net/issues/3059Issue Tracking, Patch, Vendor Advisory

Timeline

Published: Jun 11, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2022-30780?

How severe is CVE-2022-30780?

CVE-2022-30780 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 56.42% probability of exploitation in the next 30 days.

How do I fix CVE-2022-30780?

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-2022-30780?

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

Scan your code now

Source: NVD / NIST