CVE-2026-75596

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

• ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
• AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
• Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.37% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 31.0% of scored records. A rank, not a probability.

NVD base score

8.7 (CVSS v4.0), scored by the NVD independently of the CNA.

NVD CVSS vector

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

NVD analysis status

Analyzed. NVD last modified this record on 2026-10-26.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2026-08-19 20:56Z2 MO AGO

Last updated

2026-08-20 19:59Z2 MO AGO

Reserved

2026-08-17

Assigning CNA

GitHub_M

Record state

PUBLISHED

Severity

High (CVSS 8.7)

CNA CVSS vector

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

Weaknesses

• CWE-407Inefficient Algorithmic ComplexityClass

Data version

5.2

Document digest

5a34d8483c101dec6bd3c9cb455d235122c5a1a22a6c10c3d3f9741567dac32b

• github.comhttps://github.com/netty/netty/security/advisories/GHSA-fccg-mwvh-qqg4x_refsource_CONFIRM
• github.comhttps://github.com/netty/netty/pull/17213x_refsource_MISC
• github.comhttps://github.com/netty/netty/pull/17217x_refsource_MISC
• github.comhttps://github.com/netty/netty/commit/1b5abc6443b63726c72cdd285af2feb7ddbb8ff7x_refsource_MISC
• github.comhttps://github.com/netty/netty/commit/9e0519239108a69b7e9bbc5e9182ee139a0d7961x_refsource_MISC
• github.comhttps://github.com/netty/netty/releases/tag/netty-4.1.137.Finalx_refsource_MISC
• github.comhttps://github.com/netty/netty/releases/tag/netty-4.2.17.Finalx_refsource_MISC