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HighVulnerabilityupdated 27 Oct 2026, 12:23 UTC

Golang Go: several flaws allow unspecified attacks

Several bugs in the Go programming language can be abused by attackers. Some could crash a program or show users false information.

Official source
SeverityHighVulnerability
Being exploited?UnclearNo reports either way yet
Fix available?UnclearNo fixed version published in the sources yet
How sure is this?Official sourceBacked by an official source

What happened

Multiple vulnerabilities in the Go (Golang) programming language enable an unspecified attack, including denial of service and spoofing of information, according to CERT-Bund (BSI).

Why it is dangerous: Programs built with affected Go versions could be crashed or manipulated, which may disrupt services and mislead users.

Are you affected?

You are affected if you run software built with or using an affected version of Go (Golang Go); exact versions are not stated in the material.

Golang Go (versions not specified in the material)

What to do

  1. Check which version of Go your applications and build systems use.
  2. Update Go to the latest patched release published by the Go project.
  3. Rebuild and redeploy applications compiled with Go after updating.

Timeline

  1. 27 Oct 2026, 12:16 UTC
    Publicly disclosed
  2. 27 Oct 2026, 12:16 UTC
    Reported by CERT-Bund (BSI) · CERT-Bund (BSI)
  3. 27 Oct 2026, 12:17 UTC
    Reported by CERT-Bund (BSI) · CERT-Bund (BSI)
  4. 27 Oct 2026, 12:18 UTC
    Picked up by Zero Radar

Sources 2 reports, oldest first

Official vendor, government CERT or advisory database

Technical details

ID
ZR-8fc66dcc
Disclosed
27 Oct 2026, 12:16 UTC
On Zero Radar
27 Oct 2026, 12:18 UTC (1 min after disclosure)
Last change
27 Oct 2026, 12:23 UTC

The plain-language parts and the attack diagram were written by an AI model (anthropic/claude-haiku-5.5) from the sources above. Facts like versions, exploitation and dates come from the sources themselves. How Zero Radar works

Golang Go: several flaws allow unspecified attacks · Zero Radar