[UPDATE] [hoch] Golang Go: Mehrere Schwachstellen ermöglichen nicht spezifizierten Angriff

CSIRTS triage

What

Multiple vulnerabilities allow unspecified attack.

Who is affected

Deployments of Golang Go.

Urgency

Remediation is urgent due to the high severity of the vulnerabilities.

Action

Monitor for updates and apply patches when available.

AI-assisted analysis generated from the source advisory — verify against the original.

Details

Source

CERT-Bund (BSI) Security Advisories (DE · national-cert · site)

Severity

high

Published

2026-09-11

Exploitation

Not in CISA KEV at last sync

Original advisory: https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-0548

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

• Low exploitation riskCVE-2026-256790.73% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 52% of all EPSS-scored CVEs.
• Low exploitation riskCVE-2026-271370.61% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 47% of all EPSS-scored CVEs.
• Low exploitation riskCVE-2026-271380.35% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 28% of all EPSS-scored CVEs.
• Low exploitation riskCVE-2026-271390.20% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 10% of all EPSS-scored CVEs.
• Low exploitation riskCVE-2026-271420.33% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 26% of all EPSS-scored CVEs.

Referenced CVEs

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

• medium[UPDATE] [mittel] Golang Go: Mehrere Schwachstellencert-bund
• high[NEW] [high] IBM Concert: Multiple vulnerabilitiescert-bund
• mediumCVE-2026-27137: Incorrect enforcement of email constraints in crypto/x509msrc
• high[UPDATE] [high] IBM App Connect Enterprise Certified Container: Multiple vulnerabilitiescert-bund
• high[UPDATE] [high] IBM App Connect Enterprise: Multiple vulnerabilitiescert-bund

Recent advisories for Golang Go

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

• medium[UPDATE] [mittel] Golang Go-Module (Net, Image, Crypto: Mehrere Schwachstellencert-bund · 2026-09-11
• medium[UPDATE] [mittel] Golang Go: Mehrere Schwachstellencert-bund · 2026-09-11
• high[UPDATE] [hoch] Golang Go: Mehrere Schwachstellencert-bund · 2026-09-11
• high[UPDATE] [hoch] Golang Go: Mehrere Schwachstellencert-bund · 2026-09-11
• medium[UPDATE] [mittel] Golang Go: Mehrere Schwachstellencert-bund · 2026-09-11
• high[UPDATE] [hoch] Golang Go: Mehrere Schwachstellencert-bund · 2026-09-11

More from CERT-Bund (BSI) Security Advisories

• high[UPDATE] [hoch] Red Hat Enterprise Linux (postgis, virtuoso-opensource): Mehrere Schwachstellen2026-09-11
• medium[UPDATE] [mittel] Red Hat Enterprise Linux: Mehrere Schwachstellen2026-09-11
• medium[UPDATE] [mittel] Linux Kernel: Schwachstelle ermöglicht Denial of Service2026-09-11
• medium[UPDATE] [mittel] Linux Kernel: Mehrere Schwachstellen2026-09-11
• high[UPDATE] [hoch] OpenSSL: Mehrere Schwachstellen2026-09-11