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TI-2025-38486 Aliases CVE-2025-62168

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

Priority CRITICAL 85CWE-209Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Information disclosure
Confidentiality · integrity · availability
High · High · None
Fix status
Partial Red Hat: 17 fixed, 1 without a fix

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-209.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.64816 99th percentileScored 2026-11-07
Fix Partial squid (squid-cache): 7.2Red Hat: 13 advisoriesRed Hat: 17 fixed, 1 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
squid-cachesquidbefore 7.27.2Patch availableCNA
  • squid Vendorsquid-cache Affected before 7.2 Fixed in 7.2 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:squid-cache:squid:*:*:*:*:*:*:*:*before 7.2Vulnerablesquid-cache
  • cpe:2.3:a:squid-cache:squid:*:*:*:*:*:*:*:* Versions before 7.2 Vulnerable ·squid-cache

Remediation

  • Fix · CNA squid (squid-cache) Fixed in 7.2

Red Hat 13 advisories

  • RHSA-2025:21090 Released 2025-11-12 · Red Hat rating Important
    squid:4 security update
    • Red Hat Enterprise Linux AppStream AUS (v.8.4) libecap-1.0.1-2.module+el8.1.0+4044+36416a77.src::squid:4, libecap-1.0.1-2.module+el8.1.0+4044+36416a77.x86_64::squid:4, libecap-devel-1.0.1-2.module+el8.1.0+4044+36416a77.x86_64::squid:4 +2
    • Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4) libecap-1.0.1-2.module+el8.1.0+4044+36416a77.src::squid:4, libecap-1.0.1-2.module+el8.1.0+4044+36416a77.x86_64::squid:4, libecap-devel-1.0.1-2.module+el8.1.0+4044+36416a77.x86_64::squid:4 +2
  • RHSA-2025:21066 Released 2025-11-12 · Red Hat rating Important
    squid security update
    • Red Hat Enterprise Linux AppStream EUS (v.9.6) squid-7:5.5-19.el9_6.2
  • RHSA-2025:21065 Released 2025-11-12 · Red Hat rating Important
    squid security update
    • Red Hat Enterprise Linux AppStream EUS (v. 10.0) squid-7:6.10-5.el10_0.1
Show 10 more Red Hat advisories
  • RHSA-2025:21002 Released 2025-11-11 · Red Hat rating Important
    squid security update
    • Red Hat Enterprise Linux AppStream (v. 10) squid-7:6.10-6.el10_1.1
  • RHSA-2025:20935 Released 2025-11-11 · Red Hat rating Important
    squid security update
    • Red Hat Enterprise Linux AppStream (v. 9) squid-7:5.5-22.el9_7.1
  • RHSA-2025:19967 Released 2025-11-10 · Red Hat rating Important
    squid:4 security update
    • Red Hat Enterprise Linux AppStream AUS (v. 8.2) libecap-1.0.1-2.module+el8.1.0+4044+36416a77.src::squid:4, libecap-1.0.1-2.module+el8.1.0+4044+36416a77.x86_64::squid:4, libecap-devel-1.0.1-2.module+el8.1.0+4044+36416a77.x86_64::squid:4 +2
  • RHSA-2025:19398 Released 2025-11-03 · Red Hat rating Important
    squid:4 security update
    • Red Hat Enterprise Linux AppStream E4S (v.8.8) libecap-1.0.1-2.module+el8.1.0+4044+36416a77.ppc64le::squid:4, libecap-1.0.1-2.module+el8.1.0+4044+36416a77.src::squid:4, libecap-1.0.1-2.module+el8.1.0+4044+36416a77.x86_64::squid:4 +5
    • Red Hat Enterprise Linux AppStream TUS (v.8.8) libecap-1.0.1-2.module+el8.1.0+4044+36416a77.src::squid:4, libecap-1.0.1-2.module+el8.1.0+4044+36416a77.x86_64::squid:4, libecap-devel-1.0.1-2.module+el8.1.0+4044+36416a77.x86_64::squid:4 +2
  • RHSA-2025:19277 Released 2025-10-30 · Red Hat rating Important
    squid:4 security update
    • Red Hat Enterprise Linux AppStream AUS (v.8.6) libecap-1.0.1-2.module+el8.1.0+4044+36416a77.src::squid:4, libecap-1.0.1-2.module+el8.1.0+4044+36416a77.x86_64::squid:4, libecap-devel-1.0.1-2.module+el8.1.0+4044+36416a77.x86_64::squid:4 +2
    • Red Hat Enterprise Linux AppStream E4S (v.8.6) libecap-1.0.1-2.module+el8.1.0+4044+36416a77.aarch64::squid:4, libecap-1.0.1-2.module+el8.1.0+4044+36416a77.ppc64le::squid:4, libecap-1.0.1-2.module+el8.1.0+4044+36416a77.s390x::squid:4 +11
    • Red Hat Enterprise Linux AppStream TUS (v.8.6) libecap-1.0.1-2.module+el8.1.0+4044+36416a77.src::squid:4, libecap-1.0.1-2.module+el8.1.0+4044+36416a77.x86_64::squid:4, libecap-devel-1.0.1-2.module+el8.1.0+4044+36416a77.x86_64::squid:4 +2
  • RHSA-2025:19167 Released 2025-10-28 · Red Hat rating Important
    squid security update
    • Red Hat Enterprise Linux Server (v. 7 ELS) squid-7:3.5.20-17.el7_9.15
  • RHSA-2025:19115 Released 2025-10-28 · Red Hat rating Important
    squid security update
    • Red Hat Enterprise Linux AppStream EUS (v.9.4) squid-7:5.5-13.el9_4.4
  • RHSA-2025:19118 Released 2025-10-28 · Red Hat rating Important
    squid security update
    • Red Hat Enterprise Linux AppStream E4S (v.9.0) squid-7:5.2-1.el9_0.9
  • RHSA-2025:19114 Released 2025-10-28 · Red Hat rating Important
    squid security update
    • Red Hat Enterprise Linux AppStream E4S (v.9.2) squid-7:5.5-5.el9_2.10
  • RHSA-2025:19107 Released 2025-10-27 · Red Hat rating Important
    squid:4 security update
    • Red Hat Enterprise Linux AppStream (v. 8) libecap-1.0.1-2.module+el8.9.0+19703+a1da7223.aarch64::squid:4, libecap-1.0.1-2.module+el8.9.0+19703+a1da7223.ppc64le::squid:4, libecap-1.0.1-2.module+el8.9.0+19703+a1da7223.s390x::squid:4 +11

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 6AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux AppStream (v. 10)Fixed RHSA-2025:21002
Red Hat Enterprise Linux AppStream (v. 8)Fixed RHSA-2025:19107
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2025:20935
Red Hat Enterprise Linux AppStream AUS (v. 8.2)Fixed RHSA-2025:19967
Red Hat Enterprise Linux AppStream AUS (v.8.4)Fixed RHSA-2025:21090
Red Hat Enterprise Linux AppStream AUS (v.8.6)Fixed RHSA-2025:19277
Red Hat Enterprise Linux AppStream E4S (v.8.6)Fixed RHSA-2025:19277
Red Hat Enterprise Linux AppStream E4S (v.8.8)Fixed RHSA-2025:19398
Red Hat Enterprise Linux AppStream E4S (v.9.0)Fixed RHSA-2025:19118
Red Hat Enterprise Linux AppStream E4S (v.9.2)Fixed RHSA-2025:19114
Red Hat Enterprise Linux AppStream EUS (v. 10.0)Fixed RHSA-2025:21065
Red Hat Enterprise Linux AppStream EUS (v.9.4)Fixed RHSA-2025:19115
Red Hat Enterprise Linux AppStream EUS (v.9.6)Fixed RHSA-2025:21066
Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4)Fixed RHSA-2025:21090
Red Hat Enterprise Linux AppStream TUS (v.8.6)Fixed RHSA-2025:19277
Red Hat Enterprise Linux AppStream TUS (v.8.8)Fixed RHSA-2025:19398
Red Hat Enterprise Linux Server (v. 7 ELS)Fixed RHSA-2025:19167
Not affected: 2 products
  • Red Hat Enterprise Linux Server (v. 7 ELS)
  • Red Hat Enterprise Linux Server Optional (v. 7 ELS)

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-62168
  2. 2026-11-07 Priority changed: HIGH → CRITICAL

References

Patch 1

Advisory 1

  • TI-2024-16845 Denial of Service in HTTP Header parser in squid proxy CVSS 3.1HIGH 7.5
  • TI-2024-16566 SQUID-2024:1 Denial of Service in HTTP Chunked Decoding CVSS 3.1HIGH 8.6
  • TI-2023-26921 Denial of Service in HTTP Message Processing in Squid CVSS 3.1HIGH 8.6
  • TI-2023-27496 SQUID-2023:10 Denial of Service in HTTP Request parsing CVSS 3.1HIGH 8.6
  • TI-2023-25306 Squid: denial of service in http digest authentication CVSS 3.1HIGH 8.6
  • TI-2016-03919 client_side.cc in Squid before 3.5.18 and 4.x before 4.0.10 does not properly ignore the… CVSS 3.0HIGH 8.6
See all 110 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences