Is CVE-2007-3947 in the CISA KEV catalog?

No. CVE-2007-3947 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2007-3947?

CVE-2007-3947 has a CVSS v2 base score of 5.8 (MEDIUM).

What is the EPSS score for CVE-2007-3947?

CVE-2007-3947 has an EPSS score of 8.07% (94th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2007-3947?

Upgrade lighttpd on debian 11 to 1.4.16-1 or later.

CVE & CISA-KEV Catalog

CVE-2007-3947

MEDIUMEPSS 94th pctl

5.8

CVSS v2

NVD

Description

request.c in lighttpd 1.4.15 allows remote attackers to cause a denial of service (daemon crash) by sending an HTTP request with duplicate headers, as demonstrated by a request containing two Location header lines, which results in a segmentation fault.

How to fix

Remediation Available

lighttpdDebian

Fixed in:1.4.16-1CVE-2007-3947

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v2 Vector

No CVSS vector data available.

Exploit Intelligence

8.07%probability of exploitation in 30 days

94thpercentile

High risk: more likely to be exploited than 94% of all known CVEs.

References

Vendor Advisory2

Other references11

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-04-23.