GHSA-95rf-557x-44g5 · Severity: high · Ecosystem: maven — Undertow vulnerable to Dos via Large AJP request
When a POST request comes through AJP and the request exceeds the max-post-size limit (maxEntitySize), Undertow's AjpServerRequestConduit implementation closes a connection without sending any response to the client/proxy. This behavior results in that a front-end proxy marking the backend worker (application server) as an error state and not forward requests to the worker for a while. In mod_cluster, this continues until the next STATUS request (10 seconds intervals) from the application server updates the server state. So, in the worst case, it can result in "All workers are in error state" and mod_cluster responds "503 Service Unavailable" for a while (up to 10 seconds). In mod_proxy_balancer, it does not forward requests to the worker until the "retry" timeout passes. However, luckily, mod_proxy_balancer has "forcerecovery" setting (On by default; this parameter can force the immediate recovery of all workers without considering the retry parameter of the workers if all workers of a balancer are in error state.). So, unlike mod_cluster, mod_proxy_balancer does not result in responding "503 Service Unavailable". An attacker could use this behavior to send a malicious request and trigger server errors, resulting in DoS (denial of service). This flaw was fixed in Undertow 2.2.19.Final, Undertow 2.3.0.Alpha2.
Conclusion & alert: CVE-2022-2053 is rated Moderate Risk (49.4/100): CVSS High severity, with medium exploitation likelihood (EPSS 0.87%). Mandatory action: Review affected assets and schedule remediation.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2026-06-15 | 0.34% | 0.87% | +0.53% |
| 2 | 2026-01-19 | 0.39% | 0.34% | -0.05% |
| 3 | 2026-01-18 | — | 0.39% | — |
Full EPSS history (36 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 7.5 | 3.1 | HIGH |
|
3.9 | 3.6 | [email protected] |
GHSA-95rf-557x-44g5 · Severity: high · Ecosystem: maven — Undertow vulnerable to Dos via Large AJP request
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
not yet assigned | CVE-2022-2053 not yet assigned priority: Debian including 1 source packages (undertow), 2 status rows across 2 suites (forky, sid): resolved 2. | https://security-tracker.debian.org/tracker/CVE-2022-2053 |
redhat
|
medium | — | https://access.redhat.com/security/cve/CVE-2022-2053 |
ubuntu
|
medium | CVE-2022-2053 medium priority: Ubuntu including 1 source packages (undertow), 13 status rows across 13 suites (bionic, focal, impish, jammy, kinetic, lunar, mantic, noble, oracular, plucky, questing, upstream, xenial): needs-triage 7, ignored 4, DNE 2. | https://ubuntu.com/security/CVE-2022-2053 |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| redhat | integration_camel_k | — | cpe:2.3:a:redhat:integration_camel_k:-:*:*:*:*:*:*:* |
| redhat | jboss_fuse | 7.0.0 | cpe:2.3:a:redhat:jboss_fuse:7.0.0:*:*:*:*:*:*:* |
| redhat | undertow | < 2.2.19 | cpe:2.3:a:redhat:undertow:*:*:*:*:*:*:*:* |
| redhat | undertow | 2.3.0 | cpe:2.3:a:redhat:undertow:2.3.0:alpha1:*:*:*:*:*:* |
| URL | Tags |
|---|---|
| https://bugzilla.redhat.com/show_bug.cgi?id=2095862&comment#0 | Issue Tracking Vendor Advisory |
| https://issues.redhat.com/browse/UNDERTOW-2133 | Vendor Advisory |