How many CVEs have patched PerMessageDeflate?

1 published CVEs changed PerMessageDeflate in nodejs/undici, in 1 distinct patches totalling 5 changed lines, between 2026 and 2026.

What is the latest CVE that changed PerMessageDeflate?

CVE-2026-85024 (undici vulnerable to Denial of Service via unhandled error in WebSocket permessage-deflate decompression), published 2026-09-04, changed lines 66 to 71 of lib/web/websocket/permessage-deflate.js.

How does PerMessageDeflate compare to the rest of nodejs/undici?

nodejs/undici has 32 CVEs with a located fix in total; 1 of them changed PerMessageDeflate.

What do the line numbers refer to?

Line numbers are in the fixed version of the file, as the upstream patch left it. A CVE whose fix was backported to several branches is listed once, with the lines from the upstream commit.

RadicalNotion.AI

Security data

Weaknesses (CWE)The MITRE CWE weakness catalog
Attack Patterns (CAPEC)MITRE CAPEC attack patterns
CNAsNumbering authorities and report cards
VendorsVulnerabilities by vendor
Patched FunctionsWhere CVE fixes land in code

Tools

CVSS CalculatorScore CVSS 4.0, 3.1, 3.0 & 2.0
Badge BuilderEmbeddable SVG badges for READMEs

Resources

LearnSecurity guides
Data SourcesCVE data sources

About Blog Pricing Demo

Home
Patched Functions
Nodejs
Undici
PerMessageDeflate

RadicalNotion.AI

We do not sell or share your personal information.

Security Data

CWE Directory
CAPEC Directory
CNA Directory
CNA Leaderboard
CNA Report Cards
Vendor Directory
Patched Functions
Data Sources

Calculators

CVSS Calculator
CVSS 4.0
CVSS 3.1
CVSS 3.0
CVSS 2.0
Badge Builder

Platform

My Vulnerabilities
Insights
Notifications
Pricing

Learn

Guides
What is a CVE?
What is CVSS?
The CISA KEV catalog
What is EPSS?

Company

About
Blog
Careers
Contact
Demo

Account

Legal

Security
Privacy
Terms

RadicalNotion.AI

Security data

Weaknesses (CWE)The MITRE CWE weakness catalog
Attack Patterns (CAPEC)MITRE CAPEC attack patterns
CNAsNumbering authorities and report cards
VendorsVulnerabilities by vendor
Patched FunctionsWhere CVE fixes land in code

Tools

CVSS CalculatorScore CVSS 4.0, 3.1, 3.0 & 2.0
Badge BuilderEmbeddable SVG badges for READMEs

Resources

LearnSecurity guides
Data SourcesCVE data sources

About Blog Pricing Demo

Home
Patched Functions
Nodejs
Undici
PerMessageDeflate

PerMessageDeflate in nodejs/undici: Patched by 1 CVEs

nodejs/undici

Class

PerMessageDeflate

Name: PerMessageDeflate in nodejs/undici: CVE fixes
Creator: RadicalNotion.AI
License: https://creativecommons.org/licenses/by-nc/4.0/

lib/web/websocket/permessage-deflate.js

Last patched September 4, 2026

CVEs

That changed this function

Distinct patches

Backports counted once

Lines changed

Added plus removed

2026

Years

By CVE publication date

Overview

PerMessageDeflate in nodejs/undici was changed by 1 published CVE fixes in 2026, in 1 distinct patches that added or removed 5 lines in total.

nodejs/undici has 32 CVEs with a located fix in total, so 3% of them touched this function.

CVEs that patched it

Every published CVE whose fix changed PerMessageDeflate, newest first, with the lines each fix touched.

undici vulnerable to Denial of Service via unhandled error in WebSocket permessage-deflate decompression
CVE-2026-85024 · lines 66–71 · +5 −0
Medium · CVSS 5.9
EPSS 0.4%2026-09-04

Get an alert when the next CVE fix lands in nodejs/undici, with the patched functions.

Monitor undici CVEs

Other hotspots in the repository

Functions in nodejs/undici changed by the most CVE fixes.

processHeader3 CVEs · lib/core/request.js canCacheResponse2 CVEs · lib/handler/cache-handler.js writeH12 CVEs · lib/dispatcher/client-h1.js httpRedirectFetch2 CVEs · lib/fetch/index.js shouldRetry2 CVEs · lib/handler/retry-handler.js parseCacheControlHeader2 CVEs · lib/util/cache.js

All patched functions in nodejs/undici

Frequently asked questions

Common questions about CVE fixes to PerMessageDeflate.

How many CVEs have patched PerMessageDeflate?: 1 published CVEs changed PerMessageDeflate in nodejs/undici, in 1 distinct patches totalling 5 changed lines, between 2026 and 2026.
What is the latest CVE that changed PerMessageDeflate?: CVE-2026-85024 (undici vulnerable to Denial of Service via unhandled error in WebSocket permessage-deflate decompression), published 2026-09-04, changed lines 66 to 71 of lib/web/websocket/permessage-deflate.js.
How does PerMessageDeflate compare to the rest of nodejs/undici?: nodejs/undici has 32 CVEs with a located fix in total; 1 of them changed PerMessageDeflate.
What do the line numbers refer to?: Line numbers are in the fixed version of the file, as the upstream patch left it. A CVE whose fix was backported to several branches is listed once, with the lines from the upstream commit.

References

lib/web/websocket/permessage-deflate.js on GitHub (opens in a new tab)
All patched functions in nodejs/undici
Patched functions directory

Fix locations are computed by RadicalNotion.AI from the upstream patch diff of each CVE. CVE data is sourced from the CVE Program.

Track nodejs/undici CVEs

Get an alert when a new CVE lands in this repository, with the patched functions and AI-written remediation guidance.

Create an account See pricing

On this page

Overview
CVEs that patched it
Other hotspots in the repository
FAQ
References