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Vulnerability record · CVE-2021-46784 · published 17 July 2022

CVE-2021-46784: Squid-cache squid vulnerability

Squid Cache · Squid

In Squid 3.x through 3.5.28, 4.x through 4.17, and 5.x before 5.6, due to improper buffer management, a Denial of Service can occur when processing long Gopher server responses.

6.5 CVSS 3.1 Medium EPSS 5.1% · top 7.8% CWE-617 · CWE-617
6.5CVSS 3.1 base score
5.1%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
18References
17 Jun 2026Last modified by NVD

Description

In Squid 3.x through 3.5.28, 4.x through 4.17, and 5.x before 5.6, due to improper buffer management, a Denial of Service can occur when processing long Gopher server responses.

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

Affected products

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

References

LinkTags
http://www.openwall.com/lists/oss-security/2023/10/13/1
http://www.openwall.com/lists/oss-security/2023/10/13/10
http://www.openwall.com/lists/oss-security/2023/10/21/1
http://www.squid-cache.org/Versions/v4/changesets/SQUID-2021_7.patch Broken Link
http://www.squid-cache.org/Versions/v5/changesets/SQUID-2021_7.patch PatchVendor Advisory
https://github.com/squid-cache/squid/commit/5e2ea2b13bd98f53e29964ca26bb0d602a8a12b9 PatchThird Party Advisory
https://github.com/squid-cache/squid/security/advisories/GHSA-f5cp-6rh3-284w MitigationPatchThird Party Advisory
https://security-tracker.debian.org/tracker/CVE-2021-46784 Third Party Advisory
https://security.netapp.com/advisory/ntap-20221223-0007/ Third Party Advisory
http://www.openwall.com/lists/oss-security/2023/10/13/1
http://www.openwall.com/lists/oss-security/2023/10/13/10
http://www.openwall.com/lists/oss-security/2023/10/21/1
http://www.squid-cache.org/Versions/v4/changesets/SQUID-2021_7.patch Broken Link
http://www.squid-cache.org/Versions/v5/changesets/SQUID-2021_7.patch PatchVendor Advisory
https://github.com/squid-cache/squid/commit/5e2ea2b13bd98f53e29964ca26bb0d602a8a12b9 PatchThird Party Advisory
https://github.com/squid-cache/squid/security/advisories/GHSA-f5cp-6rh3-284w MitigationPatchThird Party Advisory
https://security-tracker.debian.org/tracker/CVE-2021-46784 Third Party Advisory
https://security.netapp.com/advisory/ntap-20221223-0007/ Third Party Advisory

Track CVE-2021-46784 inside VULONE

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2021-46784), CISA KEV, FIRST EPSS (scores of 2026-10-08). This page is refreshed as NVD updates the record.