CVE-2016-10003 Information disclosure in n/a
Incorrect header comparison in Squid's Collapsed Forwarding feature may leak private responses to multiple clients.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2016-10003?
CVE-2016-10003 is a high-severity vulnerability in Squid-Cache Squid, published on 27 Jan 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-697
Which versions are affected by CVE-2016-10003?
It affects 1 product.
Products include Squid-Cache Squid.
How do I fix CVE-2016-10003?
Upgrade to a fixed version.
Is CVE-2016-10003 being exploited?
There is no known exploitation of CVE-2016-10003 in the wild and no public exploit code.
Other vulnerabilities in Squid-Cache Squid
- CVE-2025-62168 Squid vulnerable to information disclosure via authentication credential leakage in error handling
- CVE-2025-54574 Squid's URN Handling can lead to Buffer Overflow
- CVE-2026-33526 Squid vulnerable to Denial of Service in ICP Request handling
- CVE-2026-32748 Squid has Denial of Service in ICP Response handling
- CVE-2023-50269 SQUID-2023:10 Denial of Service in HTTP Request parsing
Sources
Also known as ALPINE-CVE-2016-10003, GHSA-96r9-hr2x-h9g7, UBUNTU-CVE-2016-10003.