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CVE-2026-28898

MEDIUM
5.3
CVSS 3.1
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.

Metadata

CVE ID
CVE-2026-28898
State
PUBLISHED
Assigner
apple
Reserved
2026-03-03 16:36 UTC
Published
2026-06-25 18:36 UTC
Last updated
2026-06-25 19:28 UTC
Primary CWE
CWE-116
CWE-116 Improper Encoding or Escaping of Output
Vendor / Product
Apple / swift-nio-http2
Sources
cve.org  ·  NVD

Severity & Metrics

5.3 MEDIUM CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
SSVC — CISA Coordinator
Exploitation
none
Automatable
yes
Tech. Impact
partial
Affected products (1)
VendorProductPlatformVersions
Apple swift-nio-http2 — 0 < 1.44.1
Weakness (CWE)
CWESourceDescription
— cna 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.
CWE-116 adp CWE-116 Improper Encoding or Escaping of Output
CVSS scores (1)
ScoreSeverityVersionSourceVector
5.3 MEDIUM 3.1 adp CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
References (1)
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