Incorrect Conversion between Numeric Types Affecting pki-deps:10.6/resteasy package, versions *


Severity

Recommended
0.0
medium
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.24% (15th percentile)

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  • Snyk IDSNYK-RHEL8-PKIDEPS-18835317
  • published15 Aug 2026
  • disclosed14 Aug 2026

Introduced: 14 Aug 2026

NewCVE-2026-19879  (opens in a new tab)
CWE-681  (opens in a new tab)

How to fix?

There is no fixed version for RHEL:8 pki-deps:10.6/resteasy.

NVD Description

Note: Versions mentioned in the description apply only to the upstream pki-deps:10.6/resteasy package and not the pki-deps:10.6/resteasy package as distributed by RHEL. See How to fix? for RHEL:8 relevant fixed versions and status.

A flaw was found in Undertow, an HTTP server, within its HTTP response header writing path. The writeString() method performs a silent narrowing cast from 16-bit Unicode characters to 8-bit bytes when writing HTTP response header values. A remote attacker can exploit this by supplying specific Unicode characters in user-controlled input that an application places into response headers. This can lead to the truncation of these characters into ASCII control characters or special symbols, potentially resulting in limited integrity impact or information disclosure if the application does not properly sanitize user input.

CVSS Base Scores

version 3.1