CVE-2026-39821
A remote, anonymous attacker can exploit multiple vulnerabilities in Golang Go to cause a denial of service, perform cross site scripting, bypass security measures or manipulate data.
CSIRTS triage
- What
- Multiple vulnerabilities in Golang Go allow remote denial of service, cross-site scripting, security bypass, and data manipulation.
- Who is affected
- Go applications and systems running vulnerable Go versions are exposed to remote anonymous attackers.
- Urgency
- High; remote attackers can cause denial of service and bypass security controls without authentication.
- Action
- Upgrade Golang Go to the latest patched release addressing CVE-2026-33818, CVE-2026-39821, and related CVEs.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Low exploitation risk0.66% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 48% of all EPSS-scored CVEs.
Advisory coverage (6)
- high[NEW] [high] Golang Go: Multiple vulnerabilitiescert-bund · 2026-08-24
- medium[UPDATE] [medium] Golang Go-Module (Net, Image, Crypto): Multiple Vulnerabilitiescert-bund · 2026-08-24
- high[NEW] [high] Oracle Solaris third-party components: Multiple vulnerabilitiescert-bund · 2026-08-11
- unknownMultiple vulnerabilities in IBM products (July 31, 2026)cert-fr-avis · 2026-07-31
- unknownMultiple vulnerabilities in IBM products (July 17, 2026)cert-fr-avis · 2026-07-17
- unknownMultiple vulnerabilities in IBM products (June 26, 2026)cert-fr-avis · 2026-06-26
External references
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