CVE-2026-28898
swift-nio-http2 HTTP/2 to HTTP/1.1 Codec Control Character Header Injection
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.
INFO
Published Date :
June 25, 2026, 6:36 p.m.
Last Modified :
June 25, 2026, 6:36 p.m.
Remotely Exploit :
No
Source :
apple
Affected Products
The following products are affected by CVE-2026-28898
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
Solution
- Update swift-nio-http2 to version 1.44.1.
- Validate pseudo-header values for control characters.
- Reject requests with invalid pseudo-header values.
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