🛡️ CVE-2026-39821 on Go (Root.io) — net

🟠 CVSS 8.0 — High ✅ No Known Exploit OSV
8.0
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

CVE-2026-39821 in rootio-golang.org/x/net - Patched by Root

Root has patched CVE-2026-39821 in the rootio-golang.org/x/net package for Root:Go. Multiple fixed versions available.

Distribution advisory

This page covers CVE-2026-39821 as tracked by Go (Root.io), for the package net. The fix is available in version v0.42.0-aikido.2; earlier versions remain affected.

Affected software

ROOT-APP-GOBINARY-CVE-2026-39821 is recorded against 2 packages.

  • golang.org/x/net (fixed in v0.42.0-aikido.2)
  • rootio-golang.org/x/net (fixed in v0.42.0-root.io.2)

Timeline and source

Published on 22 July 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.

CVE-2026-39821 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Details

Severity HIGH
CVSS Score 8.0
CVSS Vector N/A
CWE N/A
Public Exploit ✅ No
Source OSV
Published 2026-07-22
Updated 2026-08-12
Modified 2026-07-22
Fix URL N/A

Affected Packages

Software From version Fixed in
golang.org/x/net — v0.42.0-aikido.2
rootio-golang.org/x/net — v0.42.0-root.io.2

References

N/A

Similar Threats

Site Security Check

Is net part of your stack?

ROOT-APP-GOBINARY-CVE-2026-39821 is rated CVSS 8.0 High. BotEraser scans your installation against known CVE records and tells you whether this vulnerability applies to the versions you actually run.

Scan My Site Free →

No credit card required  ·  Results in minutes

ⓘ Data Notice: The information presented above has been compiled from publicly available internet sources. Boteraser aggregates this data solely for informational purposes and does not independently classify, evaluate, or endorse any findings about the vulnerabilities listed. The accuracy and completeness of this information is the sole responsibility of the original publishers. Boteraser and its operators accept no liability for any decisions made based on this data.