Vulnerability · Published Jun 10, 2020 · Assigned by redhat

CVE-2020-10705

High 7.5

In plain English

A high-severity security flaw in Undertow. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.5% (higher than 74% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS NVD)7.5High
Exploit odds (30 days)1.5%top 26.2% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known

Official description

A flaw was discovered in Undertow in versions before Undertow 2.1.1.Final where certain requests to the "Expect: 100-continue" header may cause an out of memory error. This flaw may potentially lead to a denial of service.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:14undertow2.1.1-1DEBIAN-CVE-2020-10705
Mavenio.undertow:undertow-core2.1.1.FinalGHSA-g4cp-h53p-v3v8
Ubuntu:25.10undertowno fix listedUBUNTU-CVE-2020-10705
Ubuntu:26.04:LTSundertowno fix listedUBUNTU-CVE-2020-10705
Ubuntu:26.10undertowno fix listedUBUNTU-CVE-2020-10705

Affected products (as reported)

VendorProductVersions
n/a Undertow Versions before Undertow 2.1.1.Final.

References