Detections
Analytics
SCA: security update for io.netty:netty-codec-http2 (GHSA-c69g-56f8-xwqj)
medium Tenable Cloud Security Plugin ID 445203
Description
There are packages installed that are affected by a vulnerability referenced in the following CVE:- Netty is an asynchronous, event-driven network application framework. Prior to versions 4.1.136.Final and
4.2.16.Final, Netty's HTTP/2-to-HTTP/1.x translation layer (`Http2StreamFrameToHttpObjectCodec` and
`InboundHttp2ToHttpAdapter`) fails to deduplicate or validate `Host` headers when an HTTP/2 client
supplies both the `:authority` pseudo-header and a literal `host` header in a single HEADERS frame. The
translator maps `:authority` to `Host` and separately copies the literal `host` header, producing an
`HttpRequest` object containing two `Host` headers with attacker-controlled differing values. This issue
has been fixed in versions 4.1.136.Final and 4.2.16.Final. (CVE-2026-59900)
Solution
Update the io.netty:netty-codec-http2 library and its related packages to version 4.1.136.Final or later.See Also
Plugin Details
Severity: Medium
ID: 445203
Version: Revision 1.6
Type: Local
Family: SCA Checks
Published: 7/23/2026
Updated: 8/7/2026
Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security
Risk Information
VPR
Risk Factor: Low
Score: 1.2
Percentile: 0.01
Vendor
Vendor Severity: Medium
CVSS v2
Risk Factor: Medium
Base Score: 5
Temporal Score: 3.7
Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:P/A:N
CVSS Score Source: CVE-2026-59900
CVSS v3
Risk Factor: Medium
Base Score: 5.3
Temporal Score: 4.6
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C
CVSS v4
Risk Factor: Medium
Base Score: 6.9
Threat Score: 2.7
Threat Vector: CVSS:4.0/E:U
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
Vulnerability Information
Exploit Ease: No known exploits are available
Patch Publication Date: 7/22/2026
Vulnerability Publication Date: 7/22/2026
Reference Information
CVE: CVE-2026-59900
cwe: CWE-444