Vulnerability · CVE-2011-4968
nginx http proxy module does not verify peer identity of https origin server which could facilitate man-in-the-middle attack (MITM)
Published Nov 19, 2019 · catalog updated Oct 23, 2026 · nginx http proxy module
Check if you run it
No confirmed exploitation is on record for CVE-2011-4968. EPSS is 3.99%. Act only if a listed version of nginx http proxy module is installed.
Gaps on this record
- The stored product name is a package slug. The name on this page is taken from the title (nginx http proxy module).
- No vendor fix or required action is stored. Compare the linked advisory before you change production.
- Severity
- Unknown—
- Known exploitation
- Not in CISA/VulnCheck KEV
- EPSS
- 3.99%
- Remediation
- Advisory link
- Affected products
- Debian:12 nginx · Debian:13 nginx · Debian:14 nginx
nginx http proxy module does not verify peer identity of https origin server which could facilitate man-in-the-middle attack (MITM)
Are you affected?
Enter the version you run. The result uses only the ranges stored on this record.
The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.
- Debian:12 nginx0 → 1.9.1-1
- Debian:13 nginx0 → 1.9.1-1
- Debian:14 nginx0 → 1.9.1-1
How to fix CVE-2011-4968
Recommended remediation
A patch or advisory reference is linked. Open the original publisher for availability by product version.
Official advisories
What to do
Three questions, each answered from this record only. Confirm the vendor advisory before you patch.
Should you patch?
No confirmed exploitation is on record for CVE-2011-4968. EPSS is 3.99%. Act only if a listed version of nginx http proxy module is installed.
Which versions are affected?
Compare what you have installed with 0 → 1.9.1-1. Compare the installed version with the linked vendor advisory before you change production.
What should an analyst verify?
No weakness class is stored. EPSS 3.99%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.
Technology hubs
Code
The project this record applies to. Exploit listings stay in References.
No public source repository is identified for this product.
Timeline
Detection, updates, and resolution for this record.
Nov 19, 2019 · OpenSSF OSV / OSV Scanner
Detected
nginx http proxy module does not verify peer identity of https origin server which could facilitate man-in-the-middle attack (MITM)
Oct 23, 2026 · OpenSSF OSV / OSV Scanner
Fix available
nginx fixed in 1.9.1-1; nginx fixed in 1.9.1-1; nginx fixed in 1.9.1-1
Oct 23, 2026 · OpenSSF OSV / OSV Scanner
Fix available
nginx fixed in 1.9.1-1
Oct 23, 2026 · OpenSSF OSV / OSV Scanner
Updated
nginx http proxy module does not verify peer identity of https origin server which could facilitate man-in-the-middle attack (MITM)
Sources
- CVE.orgVulnerability recordCVE-2011-4968
Official CVE identifier
cve.org - FIRST EPSSExploitation probabilityCVE-2011-4968
30-day exploitation probability 3.99%
first.org - OpenSSF OSV / OSV ScannerPackage advisoryDEBIAN-CVE-2011-4968osv.dev
- Trivy Vulnerability DBPackage advisoryDEBIAN-CVE-2011-4968
nginx http proxy module does not verify peer identity of https origin server which could facilitate man-in-the-middle attack (MITM)
osv.dev
References
Freshness
Last verified in this catalog Oct 23, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.