🛡️ CVE-2026-39830 on Go (Root.io) — crypto

Distribution advisory

This page covers CVE-2026-39830 as tracked by Go (Root.io), for the package crypto. The fix is available in version v0.32.0-aikido.4; 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 none, availability high. (rating taken from the base CVE record.)

CVSS metrics in full

The score comes from this vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

• Attack vector: Network — reachable from anywhere that can route to the service.
• Attack complexity: Low — the attack works reliably, with no preparation.
• Privileges required: None — an unauthenticated stranger can try it.
• User interaction: None — nobody has to be tricked into anything.
• Scope: Unchanged — the damage stays inside the vulnerable component.
• Confidentiality impact: High — total loss, or loss the attacker controls.
• Integrity impact: None.
• Availability impact: High — total loss, or loss the attacker controls.

Weakness class

ROOT-APP-GOBINARY-CVE-2026-39830 is classified as CWE-119: Improper Restriction of Operations within Memory Buffer Bounds. A read or write is performed without confirming it stays inside the allocated buffer, corrupting adjacent memory.

Affected software

ROOT-APP-GOBINARY-CVE-2026-39830 is recorded against 2 packages.

• golang.org/x/crypto (fixed in v0.32.0-aikido.4)
• rootio-golang.org/x/crypto (fixed in v0.32.0-root.io.4)

Timeline and source

Published on 19 August 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.

Other advisories for this package

golang.org/x/crypto has other advisories on record. If you are patching this one, these are worth checking on the same host:

• ROOT-APP-GOBINARY-CVE-2026-39831 (9.5 Critical, published 19 Aug 2026)
• ROOT-APP-GOBINARY-CVE-2026-46595 (9.5 Critical, published 19 Aug 2026)
• ROOT-APP-GOBINARY-CVE-2025-22869 (8.0 High, published 19 Aug 2026)
• ROOT-APP-GOBINARY-CVE-2026-39829 (8.0 High, published 19 Aug 2026)
• ROOT-APP-GOBINARY-CVE-2026-42508 (9.5 Critical, published 19 Aug 2026)
• ROOT-APP-GOBINARY-CVE-2026-39828 (5.0 Medium, published 19 Aug 2026)
• ROOT-APP-GOBINARY-CVE-2026-39835 (5.0 Medium, published 19 Aug 2026)
• ROOT-APP-GOBINARY-CVE-2026-39827 (5.0 Medium, published 19 Aug 2026)

Same weakness in other software

These advisories are the same class of weakness (CWE-119: Improper Restriction of Operations within Memory Buffer Bounds) in other software:

• CVE-2017-12601 (8.0 High, published 9 Jul 2026)
• CVE-2017-12862 (8.0 High, published 9 Jul 2026)
• CVE-2022-1941 (8.0 High, published 7 Jul 2026)
• CVE-2013-4179 (published 6 Jul 2026)
• CVE-2013-4155 (published 6 Jul 2026)
• CVE-2013-0270 (published 2 Jul 2026)
• CVE-2022-33162 (7.3 High, published 16 Aug 2024)
• CVE-2022-33267 (6.7 Medium, published 6 Jun 2023)

CVE-2026-39830 on other distributions

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

Details

Affected Packages

References