squid-cache vulnerabilities (CVE)

CVE records published for squid-cache, newest first. Follow to get an email when a new one appears.

10 results
7.7High
CVE-2026-61642

Squid Request Smuggling in HTTP Transfer-Encoding

squid-cache squid

Squid is a caching proxy for the Web. From 3.3.0.1 to before 7.6, due to an improper enforcement of behavioral workflow bug, Squid is vulnerable to a Request Smuggling attack against HTTP/1.1 Transfer-Encoding. HTTP header parsing (`src/HttpHeader.cc`) accept…

2.0%EPSS
6.5Medium
CVE-2026-47729

Squid: Memory disclosure in FTP gateway

squid-cache squid

Squid is a caching proxy for the Web. Prior to 7.6, due to an improper validation of syntactic correctness of input in the FTP gateway (src/clients/FtpGateway.cc), Squid is vulnerable to an out-of-bounds read: when a listing entry date in the TypeA or TypeB d…

1.5%EPSS
5.5Medium
CVE-2026-50012

Squid: Memory corruption in cache_digest reply handling

squid-cache squid

Squid is a caching proxy for the Web. Prior to 7.6, due to an improper input validation bug in cache digest reply handling (peerDigestSwapInMask in src/peer_digest.cc), Squid is vulnerable to a heap-based buffer overflow: a cache digest's on-the-wire size may…

1.4%EPSS
9.2Critical
CVE-2026-33526

Squid vulnerable to Denial of Service in ICP Request handling

squid-cache squid; Red Hat Red Hat Enterprise Linux 10; Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support; Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support

Squid is a caching proxy for the Web. Prior to version 7.5, due to heap Use-After-Free, Squid is vulnerable to Denial of Service when handling ICP traffic. This problem allows a remote attacker to perform a reliable and repeatable Denial of Service attack aga…

9.1%EPSS
6.9Medium
CVE-2026-33515

Squid has issues in ICP message handling

squid-cache squid

Squid is a caching proxy for the Web. Prior to version 7.5, due to improper input validation, Squid is vulnerable to out of bounds read when handling ICP traffic. This problem allows a remote attacker to receive small amounts of memory potentially containing …

1.1%EPSS
8.7High
CVE-2026-32748

Squid has Denial of Service in ICP Response handling

squid-cache squid; Red Hat Red Hat Enterprise Linux 10; Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support; Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support

Squid is a caching proxy for the Web. Prior to version 7.5, due to premature release of resource during expected lifetime and heap Use-After-Free bugs, Squid is vulnerable to Denial of Service when handling ICP traffic. This problem allows a remote attacker t…

9.1%EPSS
4.0Medium
CVE-2025-59362
squid-cache squid

Squid through 7.1 mishandles ASN.1 encoding of long SNMP OIDs. This occurs in asn_build_objid in lib/snmplib/asn1.c.

9.3Critical
CVE-2025-54574

Squid's URN Handling can lead to Buffer Overflow

squid-cache squid

Squid is a caching proxy for the Web. In versions 6.3 and below, Squid is vulnerable to a heap buffer overflow and possible remote code execution attack when processing URN due to incorrect buffer management. This has been fixed in version 6.4. To work around…

22%EPSS
7.5High
CVE-2023-5824

Squid: dos against http and https

Red Hat Red Hat Enterprise Linux 8; Red Hat Red Hat Enterprise Linux 8.2 Advanced Update Support; Red Hat Red Hat Enterprise Linux 8.2 Telecommunications Update Service; Red Hat Red Hat Enterprise Linux 8.2 Update Services for SAP Solutions

A flaw was found in Squid. The limits applied for validation of HTTP response headers are applied before caching. However, Squid may grow a cached HTTP response header beyond the configured maximum size, causing a stall or crash of the worker process when a l…

3.3%EPSS