CVE-2022-30780
HighLighttpd 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.
Published Jun 11, 2022 · Updated Aug 12, 2026 · Also known as DEBIAN-CVE-2022-30780, UBUNTU-CVE-2022-30780
Key Facts
Patch immediately- CVE-2022-30780 is a high-severity vulnerability (CVSS 7.5 v3.1) affecting Lighttpd.
- It is not listed in any known-exploited vulnerabilities catalog. No public exploit code is known.
- EPSS estimates a 57% probability of exploitation in the next 30 days.
- Fixed versions are available, including Lighttpd 1.4.59-1.
- Brandefense priority: patch immediately, because it is very likely to be exploited soon.
CVSS v3.1
7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS (30-day exploit likelihood)
57%
Higher than 99.0% of all scored CVEs
Exploited in the wild
No known
Not in a known-exploited catalog
Public exploit code
None known
Get the full CVE-2022-30780 brief as a PDF
Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.
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.
Affected Products
15 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| LighttpdLighttpd | 1.4.56, 1.4.57, 1.4.58 | 1.4.59-1 |
Patched Releases
Lighttpd
1.4.59-1
Timeline
Publicly disclosed
Jun 11, 2022
Last updated
Aug 12, 2026
Weakness Type
- CWE-682 Incorrect Calculation
References
- advisoryhttps://github.com/CVEProject/cvelistV5/tree/main/cves/2022/30xxx/CVE-2022-30780.json
- advisoryhttps://github.com/lighttpd/lighttpd1.4
- advisoryhttps://nvd.nist.gov/vuln/detail/CVE-2022-30780
- advisoryhttps://security-tracker.debian.org/tracker/CVE-2022-30780
- advisoryhttps://ubuntu.com/security/CVE-2022-30780
FAQ
Common Questions.
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.
Affected: Lighttpd versions 1.4.56, 1.4.57, 1.4.58. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
No public exploit code is known.
Fixed versions are available, including Lighttpd 1.4.59-1.
Brandefense priority: patch immediately, because it is very likely to be exploited soon.
Is CVE-2022-30780 Running On Your Attack Surface?
Brandefense maps vulnerabilities like this one to your internet-facing assets and tells you exactly where to patch.
Request A Demo