SQ
Product
squid
by squid-cache · last CVE Oct 13, 2026
112
CVEs
0
On KEV
9.8
Max CVSS
1
New 30D
Severity mix
Critical 7High 49Medium 30Low 1
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CVECVSSEPSSPublishedSummary · affected versions
CVE-2020-15049
8.8
6%
Jun 30
An issue was discovered in http/ContentLengthInterpreter.cc in Squid before 4.12 and 5.x before 5.0.3
Affected: 2.0 through 2.6; 3.1 through 3.5.28; 4.0 before 4.12; 5.0 before 5.0.3; 2.7; 2.7; +7 more
CVE-2019-12527
8.8
49%
Jul 11
An issue was discovered in Squid 4.0.23 through 4.7
Affected: 4.0.23 through 4.7
CVE-2016-4051
8.8
18%
Apr 25
Buffer overflow in cachemgr.cgi in Squid 2.x, 3.x before 3.5.17, and 4.x before 4.0.9 might allow remote attackers to cause a denial of service or execute arbitrary code by…
Affected: 2.0; 2.1; 2.2; 2.3; 2.4; 2.5; +34 more
CVE-2022-41318
8.6
3%
Dec 25
A buffer over-read was discovered in libntlmauth in Squid 2.5 through 5.6
Affected: 2.5 before 5.7
CVE-2020-25097
8.6
7%
Mar 19
An issue was discovered in Squid through 4.13 and 5.x through 5.0.4
Affected: 2.0 before 4.14; 5.0.1 before 5.0.5
CVE-2016-4554
8.6
39%
May 10
mime_header.cc in Squid before 3.5.18 allows remote attackers to bypass intended same-origin restrictions and possibly conduct cache-poisoning attacks via a crafted HTTP Host…
Affected: through 3.5.17
CVE-2016-4553
8.6
80%
May 10
client_side.cc in Squid before 3.5.18 and 4.x before 4.0.10 does not properly ignore the Host header when absolute-URI is provided, which allows remote attackers to conduct…
Affected: through 3.5.17; 4.0.1; 4.0.2; 4.0.3; 4.0.4; 4.0.5; +4 more
CVE-2016-3947
8.2
15%
Apr 7
Heap-based buffer overflow in the Icmp6::Recv function in icmp/Icmp6.cc in the pinger utility in Squid before 3.5.16 and 4.x before 4.0.8 allows remote servers to cause a denial…
Affected: through 3.5.15; 4.0.1; 4.0.2; 4.0.3; 4.0.4; 4.0.5; +2 more
CVE-2016-4054
8.1
78%
Apr 25
Buffer overflow in Squid 3.x before 3.5.17 and 4.x before 4.0.9 allows remote attackers to execute arbitrary code via crafted Edge Side Includes (ESI) responses
Affected: 3.0; 3.1; 3.1.0.1; 3.1.0.2; 3.1.0.3; 3.1.0.4; +34 more
CVE-2016-4052
8.1
13%
Apr 25
Multiple stack-based buffer overflows in Squid 3.x before 3.5.17 and 4.x before 4.0.9 allow remote HTTP servers to cause a denial of service or execute arbitrary code via crafted…
Affected: 3.0; 3.1; 3.1.0.1; 3.1.0.2; 3.1.0.3; 3.1.0.4; +34 more
CVE-2026-61642
7.7
2%
Oct 13
Squid Request Smuggling in HTTP Transfer-Encoding
Affected: >= 3.3.0.1, < 7.6
CVE-2026-33526
7.5
9%
Mar 26
Squid vulnerable to Denial of Service in ICP Request handling
Affected: < 7.5
CVE-2026-32748
7.5
9%
Mar 26
Squid has Denial of Service in ICP Response handling
Affected: < 7.5
CVE-2025-62168
7.5
63%
Oct 17
Squid is a caching proxy for the Web
Affected: before 7.2
CVE-2024-45802
7.5
48%
Oct 28
Squid is an open source caching proxy for the Web supporting HTTP, HTTPS, FTP, and more
Affected: 3.0 before 6.10
CVE-2024-25111
7.5
65%
Mar 6
Squid is a web proxy cache
Affected: 3.5.27 before 6.8
CVE-2024-25617
7.5
88%
Feb 14
Squid is an open source caching proxy for the Web supporting HTTP, HTTPS, FTP, and more
Affected: 3.0 before 6.5
CVE-2023-50269
7.5
58%
Dec 14
Squid is a caching proxy for the Web
Affected: 3.1 through 5.9; 6.0.1 through 6.5; 2.6; 2.7; 2.7; 2.7; +7 more
CVE-2023-49288
7.5
5%
Dec 4
Squid is a caching proxy for the Web supporting HTTP, HTTPS, FTP, and more
Affected: 3.5 through 5.9
CVE-2023-49286
7.5
10%
Dec 4
Squid is a caching proxy for the Web supporting HTTP, HTTPS, FTP, and more
Affected: through 6.4
CVE-2023-49285
7.5
88%
Dec 4
Squid is a caching proxy for the Web supporting HTTP, HTTPS, FTP, and more
Affected: through 6.4
CVE-2023-46728
7.5
6%
Nov 6
Squid is a caching proxy for the Web supporting HTTP, HTTPS, FTP, and more
Affected: before 6.0.1
CVE-2023-5824
7.5
3%
Nov 3
A flaw was found in Squid
Affected: before 6.4
CVE-2023-46848
7.5
11%
Nov 3
Squid is vulnerable to Denial of Service, where a remote attacker can perform DoS by sending ftp:// URLs in HTTP Request messages or constructing ftp:// URLs from FTP Native…
Affected: 5.0.3 before 6.4
CVE-2023-46847
7.5
79%
Nov 3
Squid is vulnerable to a Denial of Service, where a remote attacker can perform buffer overflow attack by writing up to 2 MB of arbitrary data to heap memory when Squid is…
Affected: 3.2.0.1 before 6.4
CVE-2023-46724
7.5
4%
Nov 1
Squid is a caching proxy for the Web
Affected: 3.3.0.1 before 6.4
CVE-2021-41611
7.5
3%
Oct 18
An issue was discovered in Squid 5.0.6 through 5.1.x before 5.2
Affected: 5.0.6 before 5.2
CVE-2021-28651
7.5
7%
May 27
An issue was discovered in Squid before 4.15 and 5.x before 5.0.6
Affected: 2.0 before 4.15; 5.0 before 5.0.6
CVE-2020-24606
7.5
5%
Aug 24
Squid before 4.13 and 5.x before 5.0.4 allows a trusted peer to perform Denial of Service by consuming all available CPU cycles during handling of a crafted Cache Digest response…
Affected: 3.0 before 4.13; 5.0.1 before 5.0.4
CVE-2020-14058
7.5
3%
Jun 30
An issue was discovered in Squid before 4.12 and 5.x before 5.0.3
Affected: 3.1 through 3.5.28; 4.0 before 4.12; 5.0 before 5.0.3
CVE-2019-12520
7.5
4%
Apr 15
An issue was discovered in Squid through 4.7 and 5
Affected: through 4.7
CVE-2019-12528
7.5
10%
Feb 4
An issue was discovered in Squid before 4.10
Affected: before 4.10
CVE-2020-8517
7.5
7%
Feb 4
An issue was discovered in Squid before 4.10
Affected: before 4.10
CVE-2020-8449
7.5
8%
Feb 4
An issue was discovered in Squid before 4.10
Affected: before 4.10
CVE-2019-18679
7.5
41%
Nov 26
An issue was discovered in Squid 2.x, 3.x, and 4.x through 4.8
Affected: 2.0 through 2.7; 3.0 through 3.5.28; 4.0 through 4.8; 2.7; 2.7; 2.7; +5 more
CVE-2019-18676
7.5
9%
Nov 26
An issue was discovered in Squid 3.x and 4.x through 4.8
Affected: 3.0 through 3.5.28; 4.0 through 4.8
CVE-2019-12854
7.5
12%
Aug 15
Due to incorrect string termination, Squid cachemgr.cgi 4.0 through 4.7 may access unallocated memory
Affected: 4.0 through 4.7
CVE-2018-1000027
7.5
13%
Feb 9
The Squid Software Foundation Squid HTTP Caching Proxy version prior to version 4.0.23 contains a NULL Pointer Dereference vulnerability in HTTP Response X-Forwarded-For header…
Affected: before 4.0.23
CVE-2018-1000024
7.5
8%
Feb 9
The Squid Software Foundation Squid HTTP Caching Proxy version 3.0 to 3.5.27, 4.0 to 4.0.22 contains a Incorrect Pointer Handling vulnerability in ESI Response Processing that can…
Affected: 3.0 through 3.5.27; 4.0 through 4.0.22
CVE-2016-10003
7.5
5%
Jan 27
Incorrect HTTP Request header comparison in Squid HTTP Proxy 3.5.0.1 through 3.5.22, and 4.0.1 through 4.0.16 results in Collapsed Forwarding feature mistakenly identifying some…
Affected: 3.5.0.1 before 3.5.23; 4.0.1 before 4.0.17
CVE-2016-10002
7.5
7%
Jan 27
Incorrect processing of responses to If-None-Modified HTTP conditional requests in Squid HTTP Proxy 3.1.10 through 3.1.23, 3.2.0.3 through 3.5.22, and 4.0.1 through 4.0.16 leads…
Affected: 3.1.10; 3.1.11; 3.1.12; 3.1.14; 3.1.15; 3.1.16; +34 more
CVE-2016-4556
7.5
23%
May 10
Double free vulnerability in Esi.cc in Squid 3.x before 3.5.18 and 4.x before 4.0.10 allows remote servers to cause a denial of service (crash) via a crafted Edge Side Includes…
Affected: 3.0; 3.1; 3.1.0.1; 3.1.0.2; 3.1.0.3; 3.1.0.4; +34 more
CVE-2016-4555
7.5
18%
May 10
client_side_request.cc in Squid 3.x before 3.5.18 and 4.x before 4.0.10 allows remote servers to cause a denial of service (crash) via crafted Edge Side Includes (ESI) responses
Affected: 3.0; 3.1; 3.1.0.1; 3.1.0.2; 3.1.0.3; 3.1.0.4; +34 more
CVE-2016-3948
7.5
35%
Apr 7
Squid 3.x before 3.5.16 and 4.x before 4.0.8 improperly perform bounds checking, which allows remote attackers to cause a denial of service via a crafted HTTP response, related to…
Affected: 3.0; 3.0; 3.0; 3.0; 3.0; 3.0; +34 more
CVE-2016-2572
7.5
10%
Feb 27
http.cc in Squid 4.x before 4.0.7 relies on the HTTP status code after a response-parsing failure, which allows remote HTTP servers to cause a denial of service (assertion failure…
Affected: 4.0.1; 4.0.2; 4.0.3; 4.0.4; 4.0.5; 4.0.6
CVE-2016-2571
7.5
9%
Feb 27
http.cc in Squid 3.x before 3.5.15 and 4.x before 4.0.7 proceeds with the storage of certain data after a response-parsing failure, which allows remote HTTP servers to cause a…
Affected: 3.0; 3.0; 3.0; 3.0; 3.0; 3.0; +34 more
CVE-2016-2570
7.5
9%
Feb 27
The Edge Side Includes (ESI) parser in Squid 3.x before 3.5.15 and 4.x before 4.0.7 does not check buffer limits during XML parsing, which allows remote HTTP servers to cause a…
Affected: 3.0; 3.0; 3.0; 3.0; 3.0; 3.0; +34 more
CVE-2016-2569
7.5
31%
Feb 27
Squid 3.x before 3.5.15 and 4.x before 4.0.7 does not properly append data to String objects, which allows remote servers to cause a denial of service (assertion failure and…
Affected: 3.0; 3.0; 3.0; 3.0; 3.0; 3.0; +34 more
CVE-2020-8450
7.3
72%
Feb 4
An issue was discovered in Squid before 4.10
Affected: before 4.10
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