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Critical · 10.0 Scanner template Public exploit CVE-2025-62168 EUVD-2025-34894

Squid vulnerable to information disclosure via authentication credential leakage in error handling

Published Oct 17, 2025 · Updated Feb 26, 2026 · Assigned by GitHub_M

Vendor: squid-cache Product: squid Package: squid Package: squid Package: squid Package: squid Package: squid3 Ecosystem: Alpine Ecosystem: Azure Linux Ecosystem: Debian Ecosystem: Ubuntu

Description

Squid is a caching proxy for the Web. In Squid versions prior to 7.2, a failure to redact HTTP authentication credentials in error handling allows information disclosure. The vulnerability allows a script to bypass browser security protections and learn the credentials a trusted client uses to authenticate. This potentially allows a remote client to identify security tokens or credentials used internally by a web application using Squid for backend load balancing. These attacks do not require Squid to be configured with HTTP authentication. The vulnerability is fixed in version 7.2. As a workaround, disable debug information in administrator mailto links generated by Squid by configuring squid.conf with email_err_data off.

Affected products

VendorProductAffectedFixed
squid-cache squid < 7.2 —

Fixed in Linux distributions

Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.

Debian

Security tracker ↗
ReleasePackageFixed inAdvisory
Debian 14 squid 7.2-1 —
Debian 13 squid 6.13-2+deb13u1 DSA-6047-1
Debian 12 squid 5.7-2+deb12u4 DSA-6047-1
Debian 11 squid 4.13-10+deb11u6 DLA-4369-1

Ubuntu

Security tracker ↗
ReleasePackageFixed inAdvisory
Ubuntu 25.10 squid 6.13-1ubuntu4.1 USN-7845-1
Ubuntu 24.04 LTS squid 6.13-0ubuntu0.24.04.3 USN-7845-1
Ubuntu 22.04 LTS squid 5.9-0ubuntu0.22.04.4 USN-7845-1
Show 3 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
Ubuntu Pro 20.04 LTS squid 4.10-1ubuntu1.13+esm1 USN-7845-1
Ubuntu Pro 18.04 LTS squid3 3.5.27-1ubuntu1.14+esm4 USN-7845-1
Ubuntu Pro 16.04 LTS squid3 3.5.12-1ubuntu7.16+esm5 USN-7845-1

Red Hat

Security tracker ↗
ReleasePackageFixed inAdvisory
RHEL 10 squid 7:6.10-6.el10_1.1 RHSA-2025:21002
RHEL 9 squid 7:5.5-22.el9_7.1 RHSA-2025:20935
RHEL 8 libecap +1 1.0.1-2.module+el8.9.0+19703+a1da7223 RHSA-2025:19107
RHEL 8 squid 7:4.15-10.module+el8.10.0+23592+d564ec65.9 RHSA-2025:19107
Show 14 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
RHEL 10.0 EUS squid 7:6.10-5.el10_0.1 RHSA-2025:21065
RHEL 9.6 EUS squid 7:5.5-19.el9_6.2 RHSA-2025:21066
RHEL 9.4 EUS squid 7:5.5-13.el9_4.4 RHSA-2025:19115
RHEL 9.2 E4S squid 7:5.5-5.el9_2.10 RHSA-2025:19114
RHEL 9.0 E4S squid 7:5.2-1.el9_0.9 RHSA-2025:19118
RHEL 8.8 TUS libecap +1 1.0.1-2.module+el8.1.0+4044+36416a77 RHSA-2025:19398
RHEL 8.8 TUS squid 7:4.15-6.module+el8.8.0+23607+473e38b5.8 RHSA-2025:19398
RHEL 8.8 E4S libecap +1 1.0.1-2.module+el8.1.0+4044+36416a77 RHSA-2025:19398
RHEL 8.8 E4S squid 7:4.15-6.module+el8.8.0+23607+473e38b5.8 RHSA-2025:19398
RHEL 8.6 TUS libecap +1 1.0.1-2.module+el8.1.0+4044+36416a77 RHSA-2025:19277
RHEL 8.6 TUS squid 7:4.15-3.module+el8.6.0+23600+226c63ed.8 RHSA-2025:19277
RHEL 8.6 E4S libecap +1 1.0.1-2.module+el8.1.0+4044+36416a77 RHSA-2025:19277
RHEL 8.6 E4S squid 7:4.15-3.module+el8.6.0+23600+226c63ed.8 RHSA-2025:19277
RHEL 8.6 AUS libecap +1 1.0.1-2.module+el8.1.0+4044+36416a77 RHSA-2025:19277
RHEL 8.6 AUS squid 7:4.15-3.module+el8.6.0+23600+226c63ed.8 RHSA-2025:19277
RHEL 8.4 EUS Long Life libecap +1 1.0.1-2.module+el8.1.0+4044+36416a77 RHSA-2025:21090
RHEL 8.4 EUS Long Life squid 7:4.11-4.module+el8.4.0+23593+1fc48abe.10 RHSA-2025:21090
RHEL 8.4 AUS libecap +1 1.0.1-2.module+el8.1.0+4044+36416a77 RHSA-2025:21090
RHEL 8.4 AUS squid 7:4.11-4.module+el8.4.0+23593+1fc48abe.10 RHSA-2025:21090
RHEL 8.2 AUS libecap +1 1.0.1-2.module+el8.1.0+4044+36416a77 RHSA-2025:19967
RHEL 8.2 AUS squid 7:4.4-8.module+el8.2.0+23601+6cdb820c.11 RHSA-2025:19967
RHEL 7 ELS squid 7:3.5.20-17.el7_9.15 RHSA-2025:19167

AlmaLinux

Errata ↗
ReleasePackageFixed inAdvisory
AlmaLinux 10 squid 7:6.10-6.el10_1.1 ALSA-2025:21002
AlmaLinux 9 squid 7:5.5-22.el9_7.1 ALSA-2025:20935
AlmaLinux 8 libecap +1 1.0.1-2.module_el8.6.0+2741+01592ae8 ALSA-2025:19107
AlmaLinux 8 squid 7:4.15-10.module_el8.10.0+4055+645078d8.9 ALSA-2025:19107

Rocky Linux

Errata ↗
ReleasePackageFixed inAdvisory
Rocky Linux 10 squid 7:6.10-6.el10_1.1 RLSA-2025:21002
Rocky Linux 9 squid 7:5.5-22.el9_7.1 RLSA-2025:20935
Rocky Linux 8 libecap 1.0.1-2.module+el8.9.0+1437+df5ea8f0 RLSA-2025:19107
Rocky Linux 8 squid 7:4.15-10.module+el8.10.0+2080+49064dbd.9 RLSA-2025:19107

SUSE

Security tracker ↗
ReleasePackageFixed inAdvisory
SLES 15 SP7 squid 6.10-150600.3.14.1 SUSE-SU-2025:4026-1
SLES 15 SP6 squid 6.10-150600.3.14.1 SUSE-SU-2025:4026-1
SLES 15 SP5 squid 5.7-150400.3.38.2 SUSE-SU-2026:4909-1, SUSE-SU-2025:3902-1
SLES 15 SP4 squid 5.7-150400.3.38.2 SUSE-SU-2026:4909-1, SUSE-SU-2025:3902-1
SLES 15 SP3 squid 4.17-150000.5.58.1 SUSE-SU-2025:4029-1
Show 12 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
SLES 12 SP5 squid 4.17-4.59.1 SUSE-SU-2025:4099-1
SLES for SAP 16.0 squid 6.12-160000.3.1 SUSE-SU-2026:20078-1
SLES for SAP 15 SP5 squid 5.7-150400.3.38.2 SUSE-SU-2026:4909-1, SUSE-SU-2025:3902-1
SLES for SAP 15 SP4 squid 5.7-150400.3.38.2 SUSE-SU-2026:4909-1, SUSE-SU-2025:3902-1
SLES for SAP 15 SP3 squid 4.17-150000.5.58.1 SUSE-SU-2025:4029-1
SLES 16.0 squid 6.12-160000.3.1 SUSE-SU-2026:20078-1
SLE HPC 15 SP5 squid 5.7-150400.3.38.2 SUSE-SU-2026:4909-1, SUSE-SU-2025:3902-1
SLE HPC 15 SP4 squid 5.7-150400.3.38.2 SUSE-SU-2026:4909-1, SUSE-SU-2025:3902-1
SLE HPC 15 SP3 squid 4.17-150000.5.58.1 SUSE-SU-2025:4029-1
SUSE Manager Server LTS 4.3 squid 5.7-150400.3.38.2 SUSE-SU-2025:3902-1
SUSE Manager Proxy LTS 4.3 squid 5.7-150400.3.38.2 SUSE-SU-2025:3902-1
SUSE Enterprise Storage 7.1 squid 4.17-150000.5.58.1 SUSE-SU-2025:4029-1

openSUSE

Security tracker ↗
ReleasePackageFixed inAdvisory
openSUSE Tumbleweed squid 7.3-1.1 openSUSE-SU-2025:15715-1
openSUSE Leap 16.0 squid 6.12-160000.3.1 openSUSE-SU-2026:20027-1
openSUSE Leap 15.6 squid 6.10-150600.3.14.1 SUSE-SU-2025:4026-1

Alpine

Security tracker ↗
ReleasePackageFixed inAdvisory
Alpine v3.24 squid 7.3-r0 —
Alpine v3.23 squid 7.3-r0 —

Amazon Linux

ReleasePackageFixed inAdvisory
Amazon Linux 2023 squid 7:6.13-1.amzn2023.0.3 ALAS2023-2025-1238
Amazon Linux 2 squid +2 7:3.5.20-17.amzn2.7.25 ALAS2-2025-3045

Azure Linux

ReleasePackageFixed inAdvisory
Azure Linux 3 squid 6.13-3 —
Azure Linux 2 (CBL-Mariner) squid No fix yet —

Oracle Linux

ReleasePackageFixed inAdvisory
Oracle Linux 10 squid 7:6.10-6.el10_1.1 ELSA-2025-21002
Oracle Linux 9 squid 7:5.5-22.el9_7.1 ELSA-2025-20935
Oracle Linux 8 libecap +1 1.0.1-2.module+el8.9.0+90083+f7556140 ELSA-2025-19107
Oracle Linux 8 squid 7:4.15-10.module+el8.10.0+90691+00cd6d19.9 ELSA-2025-19107
Oracle Linux 7 squid +2 7:3.5.20-17.0.9.el7_9.13 ELSA-2025-19167

Public exploits

Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.

Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.

GitHub 3 repositories

Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.

Automated scanner template

A ready-made Nuclei template detects this vulnerability automatically. Vulnerabilities with public scanner templates are typically probed across the internet soon after the template appears — exposed systems should be patched first.

Source: projectdiscovery/nuclei-templates (MIT) — updated daily. Only links are listed.

Advisories 38

References