CVE-2022-36760: Apache HTTP Server: mod_proxy_ajp Possible request smuggling
Vulnerability summary
CVE-2022-36760 is a critical (CVSS 9.0) vulnerability in apache software foundation apache http server. EPSS estimates a 1.93% chance of exploitation in the next 30 days, higher than 80% of scored vulnerabilities.
Severe, CVSS 9 (CVE.org); no exploitation reported by the 5 checked sources; EPSS 2% (FIRST, 04-11-2026)
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 15 · Related 9Timeline
- 17-01-2023PublishedVulnerability first disclosed.
- 04-04-2025Last modifiedVulnerability information updated.
Description
Inconsistent Interpretation of HTTP Requests ('HTTP Request Smuggling') vulnerability in mod_proxy_ajp of Apache HTTP Server allows an attacker to smuggle requests to the AJP server it forwards requests to. This issue affects Apache HTTP Server Apache HTTP Server 2.4 version 2.4.54 and prior versions.
CVSS metrics
5 scores · 5 sources · 1 version- OSV · AlpineEcosystem advisory · calculated9.0CriticalCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
- OSV · UbuntuEcosystem advisory · calculated9.0CriticalCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated9.0CriticalCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
- NVDNIST9.0CriticalCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
EPSS trend
Probability
1.93%
Chance of exploitation in the next 30 days
Percentile
80%
Versus all other CVEs
30-day change
Increase +0.05 pp
From 1.88% on 05-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.
Alpine1 product
- apache2< 2.4.55-r0
Apache1 product
- http_server≥ 2.4.0, < 2.4.55
Apache software foundation1 product
- apache http server≥ 2.4, ≤ 2.4.54
Debian1 product
- apache2< 2.4.55-1
Ubuntu1 product
- apache2All versions (No fix recorded) | < 2.4.18-2ubuntu3.17+esm8 | < 2.4.29-1ubuntu4.26 | < 2.4.41-4ubuntu3.13 | < 2.4.52-1ubuntu4.3
5 vendors · 5 products
