[UPDATE] [medium] Erlang/OTP: Multiple vulnerabilities allow bypassing security measures

mediumCVE-2026-42789 CVE-2026-42790 CVE-2026-42791

A remote, anonymous attacker can exploit multiple vulnerabilities in Erlang/OTP to bypass security measures.

CSIRTS triage

vendor: Erlang/OTP product: Erlang/OTP Authentication bypass

What: A remote, anonymous attacker can exploit multiple vulnerabilities in Erlang/OTP to bypass security measures.
Who is affected: Deployments of Erlang/OTP.
Urgency: Remediation is medium urgency as it allows security measures to be bypassed.
Action: Apply security updates to Erlang/OTP as they become available.

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: medium
Published: 2026-08-25
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-2026-1719

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-2026-427890.33% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 26% of all EPSS-scored CVEs.
Low exploitation riskCVE-2026-427900.34% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 27% of all EPSS-scored CVEs.
Low exploitation riskCVE-2026-427910.32% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 24% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-42789	coverage & exploitation status	NVD · CVE.org
CVE-2026-42790	coverage & exploitation status	NVD · CVE.org
CVE-2026-42791	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

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

unknownDSA-6464-1 erlang - security updatedebian
unknownMultiple vulnerabilities in Tenable Identity Exposure (June 24, 2026)cert-fr-avis

Recent advisories for Erlang/OTP

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] Erlang/OTP: Schwachstelle ermöglicht Manipulation von Dateiencert-bund · 2026-09-10
medium[UPDATE] [mittel] Erlang/OTP: Mehrere Schwachstellencert-bund · 2026-09-09
high[UPDATE] [hoch] Erlang/OTP: Mehrere Schwachstellencert-bund · 2026-09-08
unknownCVE-2026-75538: A Signed Length Overflow in Erlang/OTP's inet TCP Driver Overflows the Receive Buffer Into BEA…msrc · 2026-09-08
unknownCVE-2026-73270: Improper Handling of Case Sensitivity vulnerability in Erlang/OTP inets httpd allows a remote …nvd · 2026-09-01
unknownCVE-2026-71562: Improper Validation of Specified Quantity in Input vulnerability in Erlang/OTP inets httpc all…nvd · 2026-09-01