CVE-2016-10003

Name: CVE-2016-10003
Creator: NVD / NIST
Published: 2017-01-27T17:59:00.18+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 4.77%

Last modified Jun 17, 2026

CVE-2016-10003 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. Incorrect HTTP Request header comparison in Squid HTTP Proxy 3.5.0.1 through 3.5.22, and 4.0.1 through 4.0.16 results in Collapsed Forwarding feature mistakenly identifying some private responses as being suitable for delivery to multiple clients.. EPSS estimates a 4.77% chance of exploitation in the next 30 days.

Description

Incorrect HTTP Request header comparison in Squid HTTP Proxy 3.5.0.1 through 3.5.22, and 4.0.1 through 4.0.16 results in Collapsed Forwarding feature mistakenly identifying some private responses as being suitable for delivery to multiple clients.

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

4.77%

90.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-697

Affected Software

Vendor	Product	Versions
Squid-Cache	Squid	>= 3.5.0.1, < 3.5.23
Squid-Cache	Squid	>= 4.0.1, < 4.0.17

References

http://www.openwall.com/lists/oss-security/2016/12/18/1Mailing List, Patch, Third Party Advisory
http://www.securityfocus.com/bid/94953Broken Link, Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1037512Broken Link, Third Party Advisory, VDB Entry
http://www.squid-cache.org/Advisories/SQUID-2016_10.txtPatch, Vendor Advisory
http://www.openwall.com/lists/oss-security/2016/12/18/1Mailing List, Patch, Third Party Advisory
http://www.securityfocus.com/bid/94953Broken Link, Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1037512Broken Link, Third Party Advisory, VDB Entry
http://www.squid-cache.org/Advisories/SQUID-2016_10.txtPatch, Vendor Advisory

Timeline

Published: Jan 27, 2017
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2016-10003?

How severe is CVE-2016-10003?

CVE-2016-10003 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 4.77% probability of exploitation in the next 30 days.

How do I fix CVE-2016-10003?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2016-10003?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST