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Vulnerability record · CVE-2019-12854 · published 15 August 2019

CVE-2019-12854: Squid-cache squid vulnerability

Squid Cache · Squid

Due to incorrect string termination, Squid cachemgr.cgi 4.0 through 4.7 may access unallocated memory. On systems with memory access protections, this can cause the CGI process to terminate unexpectedly, resulting in a denial of service for all clients using it.

7.5 CVSS 3.1 High EPSS 12% · top 4.1%
7.5CVSS 3.1 base score, v2 5.0
12%EPSS exploitation probability, 30 days
NoNot in CISA KEV
5Affected product versions listed by NVD
18References
17 Jun 2026Last modified by NVD

Description

Due to incorrect string termination, Squid cachemgr.cgi 4.0 through 4.7 may access unallocated memory. On systems with memory access protections, this can cause the CGI process to terminate unexpectedly, resulting in a denial of service for all clients using it.

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

Affected products

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

References

LinkTags
http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00053.html Mailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00056.html Mailing ListThird Party Advisory
http://www.squid-cache.org/Advisories/SQUID-2019_1.txt Vendor Advisory
http://www.squid-cache.org/Versions/v4/changesets/squid-4-2981a957716c61ff7e21eee1d7d6eb5a237e466d.patch PatchVendor Advisory
https://bugs.squid-cache.org/show_bug.cgi?id=4937 Vendor Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SPXN2CLAGN5QSQBTOV5IGVL
https://seclists.org/bugtraq/2019/Aug/42 Mailing ListThird Party Advisory
https://usn.ubuntu.com/4213-1/ Third Party Advisory
https://www.debian.org/security/2019/dsa-4507 Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00053.html Mailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00056.html Mailing ListThird Party Advisory
http://www.squid-cache.org/Advisories/SQUID-2019_1.txt Vendor Advisory
http://www.squid-cache.org/Versions/v4/changesets/squid-4-2981a957716c61ff7e21eee1d7d6eb5a237e466d.patch PatchVendor Advisory
https://bugs.squid-cache.org/show_bug.cgi?id=4937 Vendor Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SPXN2CLAGN5QSQBTOV5IGVL
https://seclists.org/bugtraq/2019/Aug/42 Mailing ListThird Party Advisory
https://usn.ubuntu.com/4213-1/ Third Party Advisory
https://www.debian.org/security/2019/dsa-4507 Third Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2019-12854), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.