UBUNTU-CVE-2026-33515

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Source
https://ubuntu.com/security/CVE-2026-33515
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-33515.json
JSON Data
https://api.test.osv.dev/v1/vulns/UBUNTU-CVE-2026-33515
Upstream
Downstream
Related
Published
2026-03-26T01:16:00Z
Modified
2026-04-13T14:33:24.376761Z
Severity
  • 6.9 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:L/SI:N/SA:N CVSS Calculator
  • 6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

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 sensitive information when responding with errors to invalid ICP requests. This attack is limited to Squid deployments that explicitly enable ICP support (i.e. configure non-zero icp_port). This problem cannot be mitigated by denying ICP queries using icp_access rules. Version 7.5 contains a patch.

References

Affected packages

Ubuntu:22.04:LTS
squid

Package

Name
squid
Purl
pkg:deb/ubuntu/squid@5.9-0ubuntu0.22.04.5?arch=source&distro=jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
5.9-0ubuntu0.22.04.5

Affected versions

4.*
4.13-10ubuntu5
5.*
5.2-1ubuntu1
5.2-1ubuntu3
5.2-1ubuntu4
5.2-1ubuntu4.1
5.2-1ubuntu4.2
5.2-1ubuntu4.3
5.7-0ubuntu0.22.04.1
5.7-0ubuntu0.22.04.2
5.7-0ubuntu0.22.04.3
5.7-0ubuntu0.22.04.4
5.9-0ubuntu0.22.04.1
5.9-0ubuntu0.22.04.2
5.9-0ubuntu0.22.04.3
5.9-0ubuntu0.22.04.4

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "squid",
            "binary_version": "5.9-0ubuntu0.22.04.5"
        },
        {
            "binary_name": "squid-cgi",
            "binary_version": "5.9-0ubuntu0.22.04.5"
        },
        {
            "binary_name": "squid-common",
            "binary_version": "5.9-0ubuntu0.22.04.5"
        },
        {
            "binary_name": "squid-openssl",
            "binary_version": "5.9-0ubuntu0.22.04.5"
        },
        {
            "binary_name": "squid-purge",
            "binary_version": "5.9-0ubuntu0.22.04.5"
        },
        {
            "binary_name": "squidclient",
            "binary_version": "5.9-0ubuntu0.22.04.5"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-33515.json"
Ubuntu:24.04:LTS
squid

Package

Name
squid
Purl
pkg:deb/ubuntu/squid@6.14-0ubuntu0.24.04.2?arch=source&distro=noble

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
6.14-0ubuntu0.24.04.2

Affected versions

6.*
6.1-2ubuntu1
6.1-2ubuntu2
6.5-1ubuntu1
6.5-1ubuntu2
6.5-1ubuntu3
6.6-1ubuntu4
6.6-1ubuntu5
6.6-1ubuntu5.1
6.10-0ubuntu0.24.04.1
6.13-0ubuntu0.24.04.1
6.13-0ubuntu0.24.04.2
6.13-0ubuntu0.24.04.3
6.14-0ubuntu0.24.04.1

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "squid",
            "binary_version": "6.14-0ubuntu0.24.04.2"
        },
        {
            "binary_name": "squid-cgi",
            "binary_version": "6.14-0ubuntu0.24.04.2"
        },
        {
            "binary_name": "squid-common",
            "binary_version": "6.14-0ubuntu0.24.04.2"
        },
        {
            "binary_name": "squid-openssl",
            "binary_version": "6.14-0ubuntu0.24.04.2"
        },
        {
            "binary_name": "squid-purge",
            "binary_version": "6.14-0ubuntu0.24.04.2"
        },
        {
            "binary_name": "squidclient",
            "binary_version": "6.14-0ubuntu0.24.04.2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-33515.json"
Ubuntu:25.10
squid

Package

Name
squid
Purl
pkg:deb/ubuntu/squid@6.14-0ubuntu0.25.10.2?arch=source&distro=questing

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
6.14-0ubuntu0.25.10.2

Affected versions

6.*
6.13-1ubuntu1
6.13-1ubuntu2
6.13-1ubuntu3
6.13-1ubuntu4
6.13-1ubuntu4.1
6.14-0ubuntu0.25.10.1

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "squid",
            "binary_version": "6.14-0ubuntu0.25.10.2"
        },
        {
            "binary_name": "squid-cgi",
            "binary_version": "6.14-0ubuntu0.25.10.2"
        },
        {
            "binary_name": "squid-common",
            "binary_version": "6.14-0ubuntu0.25.10.2"
        },
        {
            "binary_name": "squid-openssl",
            "binary_version": "6.14-0ubuntu0.25.10.2"
        },
        {
            "binary_name": "squid-purge",
            "binary_version": "6.14-0ubuntu0.25.10.2"
        },
        {
            "binary_name": "squidclient",
            "binary_version": "6.14-0ubuntu0.25.10.2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-33515.json"
Ubuntu:Pro:16.04:LTS
squid3

Package

Name
squid3
Purl
pkg:deb/ubuntu/squid3@3.5.12-1ubuntu7.16+esm6?arch=source&distro=esm-infra/xenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

3.*
3.3.8-1ubuntu16
3.3.8-1ubuntu17
3.5.12-1ubuntu6
3.5.12-1ubuntu7
3.5.12-1ubuntu7.1
3.5.12-1ubuntu7.2
3.5.12-1ubuntu7.3
3.5.12-1ubuntu7.4
3.5.12-1ubuntu7.5
3.5.12-1ubuntu7.6
3.5.12-1ubuntu7.7
3.5.12-1ubuntu7.8
3.5.12-1ubuntu7.9
3.5.12-1ubuntu7.10
3.5.12-1ubuntu7.11
3.5.12-1ubuntu7.12
3.5.12-1ubuntu7.13
3.5.12-1ubuntu7.14
3.5.12-1ubuntu7.15
3.5.12-1ubuntu7.16
3.5.12-1ubuntu7.16+esm1
3.5.12-1ubuntu7.16+esm2
3.5.12-1ubuntu7.16+esm3
3.5.12-1ubuntu7.16+esm4
3.5.12-1ubuntu7.16+esm5
3.5.12-1ubuntu7.16+esm6

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "squid",
            "binary_version": "3.5.12-1ubuntu7.16+esm6"
        },
        {
            "binary_name": "squid-cgi",
            "binary_version": "3.5.12-1ubuntu7.16+esm6"
        },
        {
            "binary_name": "squid-common",
            "binary_version": "3.5.12-1ubuntu7.16+esm6"
        },
        {
            "binary_name": "squid-purge",
            "binary_version": "3.5.12-1ubuntu7.16+esm6"
        },
        {
            "binary_name": "squid3",
            "binary_version": "3.5.12-1ubuntu7.16+esm6"
        },
        {
            "binary_name": "squidclient",
            "binary_version": "3.5.12-1ubuntu7.16+esm6"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-33515.json"
Ubuntu:Pro:18.04:LTS
squid3

Package

Name
squid3
Purl
pkg:deb/ubuntu/squid3@3.5.27-1ubuntu1.14+esm5?arch=source&distro=esm-infra/bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

3.*
3.5.23-5ubuntu1
3.5.23-5ubuntu2
3.5.27-1ubuntu1
3.5.27-1ubuntu1.1
3.5.27-1ubuntu1.2
3.5.27-1ubuntu1.3
3.5.27-1ubuntu1.4
3.5.27-1ubuntu1.5
3.5.27-1ubuntu1.6
3.5.27-1ubuntu1.7
3.5.27-1ubuntu1.8
3.5.27-1ubuntu1.9
3.5.27-1ubuntu1.10
3.5.27-1ubuntu1.11
3.5.27-1ubuntu1.12
3.5.27-1ubuntu1.13
3.5.27-1ubuntu1.14
3.5.27-1ubuntu1.14+esm1
3.5.27-1ubuntu1.14+esm2
3.5.27-1ubuntu1.14+esm3
3.5.27-1ubuntu1.14+esm4
3.5.27-1ubuntu1.14+esm5

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "squid",
            "binary_version": "3.5.27-1ubuntu1.14+esm5"
        },
        {
            "binary_name": "squid-cgi",
            "binary_version": "3.5.27-1ubuntu1.14+esm5"
        },
        {
            "binary_name": "squid-common",
            "binary_version": "3.5.27-1ubuntu1.14+esm5"
        },
        {
            "binary_name": "squid-purge",
            "binary_version": "3.5.27-1ubuntu1.14+esm5"
        },
        {
            "binary_name": "squid3",
            "binary_version": "3.5.27-1ubuntu1.14+esm5"
        },
        {
            "binary_name": "squidclient",
            "binary_version": "3.5.27-1ubuntu1.14+esm5"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-33515.json"
Ubuntu:Pro:20.04:LTS
squid

Package

Name
squid
Purl
pkg:deb/ubuntu/squid@4.10-1ubuntu1.13+esm2?arch=source&distro=esm-infra/focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

4.*
4.8-1ubuntu2
4.8-1ubuntu3
4.9-2ubuntu1
4.9-2ubuntu2
4.9-2ubuntu3
4.9-2ubuntu4
4.10-1ubuntu1
4.10-1ubuntu1.1
4.10-1ubuntu1.2
4.10-1ubuntu1.3
4.10-1ubuntu1.4
4.10-1ubuntu1.5
4.10-1ubuntu1.6
4.10-1ubuntu1.7
4.10-1ubuntu1.8
4.10-1ubuntu1.9
4.10-1ubuntu1.10
4.10-1ubuntu1.11
4.10-1ubuntu1.12
4.10-1ubuntu1.13
4.10-1ubuntu1.13+esm1
4.10-1ubuntu1.13+esm2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "squid",
            "binary_version": "4.10-1ubuntu1.13+esm2"
        },
        {
            "binary_name": "squid-cgi",
            "binary_version": "4.10-1ubuntu1.13+esm2"
        },
        {
            "binary_name": "squid-common",
            "binary_version": "4.10-1ubuntu1.13+esm2"
        },
        {
            "binary_name": "squid-purge",
            "binary_version": "4.10-1ubuntu1.13+esm2"
        },
        {
            "binary_name": "squidclient",
            "binary_version": "4.10-1ubuntu1.13+esm2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-33515.json"