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CVE-2016-10003

26
FAUCET Score

CVE-2016-10003 describes a vulnerability in Squid HTTP Proxy versions 3.5.0.1 through 3.5.22 and 4.0.1 through 4.0.16, where incorrect HTTP header comparison leads the Collapsed Forwarding feature to incorrectly serve private responses to multiple clients. This vulnerability has a CVSS score of 7.5 (High), indicating a network-based attack with low complexity and high confidentiality impact, but no integrity or availability impact. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
>= 3.5.0.1, < 3.5.23CPE matchmatch criteria
cpe:2.3:a:squid-cache:squid:*:*:*:*:*:*:*:*
>= 4.0.1, < 4.0.17CPE matchmatch criteria
cpe:2.3:a:squid-cache:squid:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
4.77%
Probability of exploitation in next 30 days
EPSS Percentile
91.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0477 is in the 84th percentile among its peer group of 51,551 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (2)

redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: squid
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: squid

Vendor Advisories (1)

redhatCVE-2016-10003Low

squid: Information disclosure in Collapsed forwarding

Dec 16, 2016

References

openwall.com / lists/oss-security/2016/12/18/1
Mailing ListPatchThird Party Advisory
securityfocus.com / bid/94953
Broken LinkThird Party AdvisoryVDB Entry
securitytracker.com / id/1037512
Broken LinkThird Party AdvisoryVDB Entry
squid-cache.org / Advisories/SQUID-2016_10.txt
PatchVendor Advisory