CVE-2026-28898

MEDIUM

Apple swift-nio-http2 < 1.44.1 - Improper Encoding or Escaping of Output

Title source: rule

Description

swift-nio-http2's HTTP/2-to-HTTP/1.1 codec did not validate pseudo-header values for control characters before placing them into the translated HTTP/1.1 message. swift-nio-http2 1.44.1 adds validation of all pseudo-header values (:path, :authority, :scheme, :method, and :status) at both the HPACK header validation layer and the HTTP/2-to-HTTP/1.1 translation layer. Requests or responses containing CR, LF, or NUL bytes in any pseudo-header value are now rejected with a connection error. This issue is fixed in swift-nio-http2 1.44.1.

References (1)

Core 1

Core References

https://github.com/advisories/GHSA-4px2-pw77-vc85

Scores

CVSS v3 5.3

EPSS 0.0019

EPSS Percentile 9.0%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

CISA SSVC

Vulnrichment

Exploitation none

Automatable yes

Technical Impact partial

Details

CWE

CWE-116

Status published

Products (2)

Apple/swift-nio-http2 < 1.44.1

apple/swiftnio_http\/2 < 1.44.1

Published Jun 25, 2026

Tracked Since Jun 26, 2026