CVSS 3.1
7.5 highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HCVE-2020-27782
High (7.5) in redhat. EPSS 1.4% chance of exploitation in the next 30 days. Fixed in io.undertow:undertow-core 2.0.33, 2.1.5.
A flaw was found in the Undertow AJP connector. Malicious requests and abrupt connection closes could be triggered by an attacker using query strings with non-RFC compliant characters resulting in a denial of service. The highest threat from this vulnerability is to system availability. This affects Undertow 2.1.5.SP1, 2.0.33.SP2, and 2.2.3.SP1.
Severity
- EPSS
- 1.4% chance of exploitation in the next 30 days; higher than 72% of CVEs (scores of 2026-10-31)
- CWE
- CWE-400
- Published
- Modified
- Record from
- the NVD, synced
Affected
- redhat:jboss_fuse
- redhat:openshift_application_runtimes
- redhat:undertow
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-rhcw-wjcm-9h6g | Maven | io.undertow:undertow-core | >=2.1.0 <2.1.5 | 2.1.5 |
| GHSA-rhcw-wjcm-9h6g | Maven | io.undertow:undertow-core | <2.0.33 | 2.0.33 |