CVE-2026-56745 - Vulnerability details

8.7/10

CVSS 4.0

CVE-2026-56745

resolved Published 2026-07-21 Updated 2026-07-30

NVD

MITRE

OpenCVE

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Vulnerability Data from Dependency-Track

Affected versions

5.7

5.7.2 5.7.1 5.7.0

5.6

5.6.8 5.6.7 5.6.6 5.6.5 5.6.4 5.6.3 5.6.2 5.6.1 5.6.0

5.5

5.5.19 5.5.18 5.5.17 5.5.16 5.5.15 5.5.14 5.5.13 5.5.12 5.5.11 5.5.10 5.5.9 5.5.8 5.5.7 5.5.6 5.5.5 5.5.4 5.5.3 5.5.2 5.5.1 5.5.0

5.4

5.4.13 5.4.12 5.4.11 5.4.10 5.4.9 5.4.8 5.4.7 5.4.6 5.4.5 5.4.4 5.4.3 5.4.2 5.4.1 5.4.0

Fixed in version 5.7.3 No fix yet in 5.6, 5.5, 5.4

Scores

8.7 CVSS 4.0 NVD CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N displayed

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

Description

Netty is a network application framework for development of protocol servers and clients. In versions 4.2.0.Final through 4.2.15.Final and 4.1.0.Final through 4.1.135.Final, the `SpdyHttpDecoder` handler in Netty's SPDY-to-HTTP codec allocates a pooled `ByteBuf` when processing a client-initiated `SYN_STREAM` frame with `FLAG_FIN=0` and stores the partially constructed `FullHttpRequest` in `messageMap`; when the remote peer sends `RST_STREAM` for that stream or the accumulated content exceeds `maxContentLength`, the decoder removes the entry but does not release the pooled `ByteBuf`, causing native memory exhaustion. This issue is fixed in versions 4.1.136.Final and 4.2.16.Final.

Same vulnerability as

GHSA-jppx-w49h-x2qq resolved according to EUVD-2026-46452

Analysis Read only

State

Justification

Recommandation

Workaround

The analysis can only be edited by the BlueMind security teams: log in.

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