🛡️ CVE-2026-1229 on Go (Root.io) — circl

🔴 CVSS 9.5 — Critical ✅ No Known Exploit OSV
9.5
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

CVE-2026-1229 in rootio-github.com/cloudflare/circl - Patched by Root

Root has patched CVE-2026-1229 in the rootio-github.com/cloudflare/circl package for Root:Go. Multiple fixed versions available.

Distribution advisory

This page covers CVE-2026-1229 as tracked by Go (Root.io), for the package circl. The fix is available in version v1.6.1-aikido.2; earlier versions remain affected.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity high, availability high.

Affected software

ROOT-APP-GOBINARY-CVE-2026-1229 is recorded against 2 packages.

  • github.com/cloudflare/circl (fixed in v1.6.1-aikido.2)
  • rootio-github.com/cloudflare/circl (fixed in v1.6.1-root.io.2)

Timeline and source

Published on 18 June 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.

CVE-2026-1229 on other distributions

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

Details

Severity CRITICAL
CVSS Score 9.5
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE N/A
Public Exploit ✅ No
Source OSV
Published 2026-06-18
Updated 2026-08-12
Modified 2026-06-18
Fix URL N/A

Affected Packages

Software From version Fixed in
github.com/cloudflare/circl — v1.6.1-aikido.2
rootio-github.com/cloudflare/circl — v1.6.1-root.io.2

References

N/A

Similar Threats

Exploit Protection

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ROOT-APP-GOBINARY-CVE-2026-1229 carries CVSS 9.5 Critical rating. BotEraser checks your installation against this and other known CVE records, and blocks IPs associated with exploit activity.

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