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Vulnerability record · CVE-2018-19052 · published 7 November 2018

CVE-2018-19052: Lighttpd path traversal vulnerability

Lighttpd · Lighttpd

An issue was discovered in mod_alias_physical_handler in mod_alias.c in lighttpd before 1.4.50. There is potential ../ path traversal of a single directory above an alias target, with a specific mod_alias configuration where the matched alias lacks a trailing '/' character, but the alias target filesystem path does have a trailing '/' character.

7.5 CVSS 3.1 High EPSS 14% · top 3.6% CWE-22 · Path traversal
7.5CVSS 3.1 base score, v2 5.0
14%EPSS exploitation probability, 30 days
NoNot in CISA KEV
5Affected product versions listed by NVD
6References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

An issue was discovered in mod_alias_physical_handler in mod_alias.c in lighttpd before 1.4.50. There is potential ../ path traversal of a single directory above an alias target, with a specific mod_alias configuration where the matched alias lacks a trailing '/' character, but the alias target filesystem path does have a trailing '/' character.

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

Affected products

5 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00054.html Mailing ListThird Party Advisory
https://github.com/lighttpd/lighttpd1.4/commit/2105dae0f9d7a964375ce681e53cb165375f84c1 ExploitVendor Advisory
https://lists.debian.org/debian-lts-announce/2022/01/msg00012.html Mailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00054.html Mailing ListThird Party Advisory
https://github.com/lighttpd/lighttpd1.4/commit/2105dae0f9d7a964375ce681e53cb165375f84c1 ExploitVendor Advisory
https://lists.debian.org/debian-lts-announce/2022/01/msg00012.html Mailing ListThird Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2018-19052), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.