[UPDATE] [high] Ruby and Ruby on Rails (erb gem): Vulnerability allows code execution

highCVE-2026-41316

A remote, anonymous attacker can exploit a vulnerability in Ruby and Ruby on Rails to bypass security measures and execute arbitrary code.

CSIRTS triage

vendor: Ruby product: Ruby and Ruby on Rails Remote code execution

What: A vulnerability allows a remote attacker to execute arbitrary code.
Who is affected: Deployments of Ruby and Ruby on Rails.
Urgency: Remediation is high urgency due to the potential for exploitation.
Action: Update to the latest version of Ruby and Ruby on Rails.

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

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Details

Source: CERT-Bund (BSI) Security Advisories (DE · national-cert · site)
Severity: high
Published: 2026-08-12
Exploitation: Not in CISA KEV at last sync
Language: Machine-translated to English — verify against the original

Original advisory: https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-1187

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.

Moderate exploitation riskCVE-2026-413161.1% 30-day exploitation probability. Patch within normal cadence, watch for KEV listing. Riskier than 64% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-41316	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

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

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