CVE-2021-46784
libecap: Squid is a high-performance proxy caching server for web clients, supporting FTP, Gopher, and HTTP data objects. Secu...
CVE-2021-46784 is fixed in 9 products on 1 platform, first by squid 3.5.27-1ubuntu1.13, released December 30, 2021. It is not reported as exploited. Patch Radar priority: High.
High
CVSS
7.5
important
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0513
92nd percentile
Squid is a high-performance proxy caching server for web clients, supporting FTP, Gopher, and HTTP data objects. Security Fix(es): * squid: DoS when processing gopher server responses (CVE-2021-46784) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| libecap · RHEL 8 | 0:1.0.1-2.module+el8.1.0+4044+36416a77 | RHSA-2022:5526 | Jul 7, 2022 |
| libecap · almalinux 8 | 1.0.1-2.module_el8.6.0+2741+01592ae8 | ALSA-2022:5526 | Jul 7, 2022 |
| libecap · ol 8 | 0:1.0.1-2.module+el8.3.0+7819+eb7d4ef6 | ELSA-2022-5526 | Jul 8, 2022 |
| libecap · rocky 8 | 0:1.0.1-2.module+el8.4.0+404+316a0dc5 | RLSA-2022:5526 | Jul 7, 2022 |
| libecap-devel · RHEL 8 | 0:1.0.1-2.module+el8.1.0+4044+36416a77 | RHSA-2022:5526 | Jul 7, 2022 |
| libecap-devel · almalinux 8 | 1.0.1-2.module_el8.6.0+2741+01592ae8 | ALSA-2022:5526 | Jul 7, 2022 |
| libecap-devel · ol 8 | 0:1.0.1-2.module+el8.3.0+7819+eb7d4ef6 | ELSA-2022-5526 | Jul 8, 2022 |
| squid · Debian 12.15 (bookworm) | 5.6-1 | DEBIAN-CVE-2021-46784 | Jul 17, 2022 |
| squid · Debian 13.5 (trixie) | 5.6-1 | DEBIAN-CVE-2021-46784 | Jul 17, 2022 |
| squid · Debian 14 | 5.6-1 | DEBIAN-CVE-2021-46784 | Jul 17, 2022 |
| squid · RHEL 8 | 7:4.15-3.module+el8.6.0+15801+8fa20c64.1 | RHSA-2022:5526 | Jul 7, 2022 |
| squid · RHEL 9 | 7:5.2-1.el9_0.1 | RHSA-2022:5527 | Jul 7, 2022 |
| squid · Ubuntu 18.04.6 LTS (bionic) | 3.5.27-1ubuntu1.13 | squid 3.5.27-1ubuntu1.13 | Dec 30, 2021 |
| squid · Ubuntu 20.04 LTS (focal) | 4.10-1ubuntu1.6 | squid 4.10-1ubuntu1.6 | Dec 30, 2021 |
| squid · Ubuntu 22.04.1 LTS (jammy) | 5.2-1ubuntu4.1 | squid 5.2-1ubuntu4.1 | Dec 30, 2021 |
| squid · Ubuntu 24.10 (oracular) | 5.2-1ubuntu5 | squid 5.2-1ubuntu5 | Jan 16, 2026 |
| squid · Ubuntu 25.04 (plucky) | 5.2-1ubuntu5 | squid 5.2-1ubuntu5 | Jan 16, 2026 |
| squid · almalinux 8 | 7:4.15-3.module_el8.6.0+3010+383bc947.1 | ALSA-2022:5526 | Jul 7, 2022 |
| squid · almalinux 9 | 7:5.2-1.el9_0.1 | ALSA-2022:5527 | Jul 7, 2022 |
| squid · ol 8 | 7:4.15-3.module+el8.6.0+20699+8fa0a254.1 | ELSA-2022-5526 | Jul 8, 2022 |
| squid · ol 9 | 7:5.2-1.el9_0.1 | ELSA-2022-5527 | Jul 7, 2022 |
| squid · rocky 8 | 7:4.15-3.module+el8.6.0+1044+67ab5d0a.2 | RLSA-2022:5526 | Jul 7, 2022 |
| squid-cgi · Ubuntu 18.04.6 LTS (bionic) | 3.5.27-1ubuntu1.13 | squid-cgi 3.5.27-1ubuntu1.13 | Dec 30, 2021 |
| squid-cgi · Ubuntu 20.04 LTS (focal) | 4.10-1ubuntu1.6 | squid-cgi 4.10-1ubuntu1.6 | Dec 30, 2021 |
| squid-cgi · Ubuntu 22.04.1 LTS (jammy) | 5.2-1ubuntu4.1 | squid-cgi 5.2-1ubuntu4.1 | Dec 30, 2021 |
| squid-cgi · Ubuntu 24.10 (oracular) | 5.2-1ubuntu5 | squid-cgi 5.2-1ubuntu5 | Jan 16, 2026 |
| squid-cgi · Ubuntu 25.04 (plucky) | 5.2-1ubuntu5 | squid-cgi 5.2-1ubuntu5 | Jan 16, 2026 |
| squid-common · Ubuntu 18.04.6 LTS (bionic) | 3.5.27-1ubuntu1.13 | squid-common 3.5.27-1ubuntu1.13 | Dec 30, 2021 |
| squid-common · Ubuntu 20.04 LTS (focal) | 4.10-1ubuntu1.6 | squid-common 4.10-1ubuntu1.6 | Dec 30, 2021 |
| squid-common · Ubuntu 22.04.1 LTS (jammy) | 5.2-1ubuntu4.1 | squid-common 5.2-1ubuntu4.1 | Dec 30, 2021 |
| squid-common · Ubuntu 24.10 (oracular) | 5.2-1ubuntu5 | squid-common 5.2-1ubuntu5 | Jan 16, 2026 |
| squid-common · Ubuntu 25.04 (plucky) | 5.2-1ubuntu5 | squid-common 5.2-1ubuntu5 | Jan 16, 2026 |
| squid-openssl · Ubuntu 22.04.1 LTS (jammy) | 5.2-1ubuntu4.1 | squid-openssl 5.2-1ubuntu4.1 | Dec 30, 2021 |
| squid-openssl · Ubuntu 24.10 (oracular) | 5.2-1ubuntu5 | squid-openssl 5.2-1ubuntu5 | Jan 16, 2026 |
| squid-openssl · Ubuntu 25.04 (plucky) | 5.2-1ubuntu5 | squid-openssl 5.2-1ubuntu5 | Jan 16, 2026 |
| squid-purge · Ubuntu 18.04.6 LTS (bionic) | 3.5.27-1ubuntu1.13 | squid-purge 3.5.27-1ubuntu1.13 | Dec 30, 2021 |
| squid-purge · Ubuntu 20.04 LTS (focal) | 4.10-1ubuntu1.6 | squid-purge 4.10-1ubuntu1.6 | Dec 30, 2021 |
| squid-purge · Ubuntu 22.04.1 LTS (jammy) | 5.2-1ubuntu4.1 | squid-purge 5.2-1ubuntu4.1 | Dec 30, 2021 |
| squid-purge · Ubuntu 24.10 (oracular) | 5.2-1ubuntu5 | squid-purge 5.2-1ubuntu5 | Jan 16, 2026 |
| squid-purge · Ubuntu 25.04 (plucky) | 5.2-1ubuntu5 | squid-purge 5.2-1ubuntu5 | Jan 16, 2026 |
| squid3 · Ubuntu 18.04.6 LTS (bionic) | 3.5.27-1ubuntu1.13 | squid3 3.5.27-1ubuntu1.13 | Dec 30, 2021 |
| squidclient · Ubuntu 18.04.6 LTS (bionic) | 3.5.27-1ubuntu1.13 | squidclient 3.5.27-1ubuntu1.13 | Dec 30, 2021 |
| squidclient · Ubuntu 20.04 LTS (focal) | 4.10-1ubuntu1.6 | squidclient 4.10-1ubuntu1.6 | Dec 30, 2021 |
| squidclient · Ubuntu 22.04.1 LTS (jammy) | 5.2-1ubuntu4.1 | squidclient 5.2-1ubuntu4.1 | Dec 30, 2021 |
| squidclient · Ubuntu 24.10 (oracular) | 5.2-1ubuntu5 | squidclient 5.2-1ubuntu5 | Jan 16, 2026 |
| squidclient · Ubuntu 25.04 (plucky) | 5.2-1ubuntu5 | squidclient 5.2-1ubuntu5 | Jan 16, 2026 |
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