CVE-2025-62168
A public proof of concept exists; no exploitation attested.
- Published2025-10-17
- Fixed in7.2
- WeaknessCWE-209 · CWE-550
Am I affected?
Debian, Ubuntu or Red Hat sometimes backport a fix without changing the upstream version number: such a version reads « to verify », never « affected ».With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.
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.
Timeline
dates in UTC- 2025-10-1717:15CVE publishedNVD
Observed activity
isMalicious corpus · updated 2026-10-27 15:37 UTCBlock these indicators
- Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2025-62168?format=txt
- CSV export: https://api.ismalicious.com/edl/cve/CVE-2025-62168?format=csv
- TAXII collection of exploited CVEs
- The EDL and CSV take an API key on the Pro plan.
Versions per branch
NVD| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 7.2 | < 7.2 | 7.2 | NVD |
as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.
Distribution builds and vendor advisories
Packages from OSV.dev and products from the vendors' CSAF advisories.
version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.
Packages
- libecapAlmaLinux:8all versions · fixed in 1.0.1-2.module_el8.6.0+3048+383bc947and 1 other package
- libecapAlmaLinux:8all versions · fixed in 1.0.1-2.module_el8.6.0+2741+01592ae8and 1 other package
- squidAlmaLinux:10all versions · fixed in 7:6.10-6.el10_1.1
- squidAlmaLinux:9all versions · fixed in 7:5.5-22.el9_7.1
- squidAlmaLinux:8all versions · fixed in 7:4.15-10.module_el8.10.0+4055+645078d8.9
Vendor advisories
squid-cache: Squid vulnerable to information disclosure via authentication credential leakage in error handling
squid as a component of Red Hat Enterprise Linux 6 · squid.src as a component of Red Hat Enterprise Linux 6 · squid34 as a component of Red Hat Enterprise Linux 6 · +1 more
Red Hat Security Advisory: squid:4 security update
Red Hat Security Advisory: squid security update
Red Hat Security Advisory: squid security update
Red Hat Security Advisory: squid security update
Red Hat Security Advisory: squid security update
8 more advisories
Fix
- Update Squid-cache squid to 7.2
- Vendor fix Red Hat Product Security RHSA-2025:21090 · 18 productsFor details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
- Workaround from the vendor Red Hat Product Security RHSA-2025:21090 · 18 productsThis vulnerability can be mitigated by disabling debug information in administration mailto links generated by Squid package. This can be accomplished in Red Hat Enterprise Linux by the following steps: 1) With administrative privileges, edit the squid configuration file located at ~~~/etc/squid/s…
Advisories and patches
- github.comPatch
- github.comMitigation
Detection
read 2026-10-27 00:21 UTC- Nuclei template
- none so far ProjectDiscovery
- Exploit-DB
- no entry Exploit-DB
- Proof-of-concept repositories
- 3 repositories, unverifiedmonzaviman/CVE-2025-62168shahroodcert/CVE-2025-62168nehkark/CVE-2025-62168 PoC-in-GitHub
Sources
- CISA-ADPSSVC decisionnone2025-10-18
- OpenCVESSVC decisionnone—
- CNACVSS 3.110read 2026-10-23
- NVDCVSS 3.17.5read 2026-10-23
- CNAweakness (CWE)CWE-209, CWE-550read 2026-10-23
- FIRST EPSSEPSS score63.4 %read 2026-10-27
- PoC-in-GitHubproof of concept3read 2026-10-27
- OSVaffected packages—
Technical details
- CVSS v3 Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- Published
- 2025-10-17
- Last Modified
- 2026-10-19
- NVD status
- Modified
Frequently asked questions
What is CVE-2025-62168?
Is CVE-2025-62168 actively exploited?
What is the CVSS score for CVE-2025-62168?
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Related vulnerabilities
Same product first, then the same vendor advisory and the same publication week.