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Vulnerabilities

Security fix · CVE-2025-46712

Erlang/OTP is a set of libraries for the Erlang programming language.

Published May 8, 2025 · catalog updated Jan 12, 2026 · Erlang/OTP is a set

Check if you run it

No confirmed exploitation is on record for CVE-2025-46712. EPSS is 0.54%. Act only if a listed version of Erlang/OTP is a set is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (Erlang/OTP is a set).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Low3.7
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.54%
Remediation
Version ranges on file
Affected products
vendor erlang otp OTP 26.2.1, < OTP 26.2.5.12

Erlang/OTP is a set of libraries for the Erlang programming language. In versions prior to OTP-27.3.4 (for OTP-27), OTP-26.2.5.12 (for OTP-26), and OTP-25.3.2.21 (for OTP-25), Erlang/OTP SSH fails to enforce strict KEX handshake hardening measures by allowing optional messages to be exchanged. This allows a Man-in-the-Middle attacker to inject these messages in a connection during the handshake. This issue has been patched in versions OTP-27.3.4 (for OTP-27), OTP-26.2.5.12 (for OTP-26), and OTP-25.3.2.21 (for OTP-25).

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor erlang otp OTP 26.2.1, < OTP 26.2.5.12OTP 26.2.1, < OTP 26.2.5.12

How to fix CVE-2025-46712

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2025-46712. EPSS is 0.54%. Act only if a listed version of Erlang/OTP is a set is installed.

Which versions are affected?

Compare what you have installed with erlang otp OTP 26.2.1, < OTP 26.2.5.12 OTP 26.2.1, < OTP 26.2.5.12. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.54%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. May 8, 2025 · EUVD

    Detected

    Erlang/OTP is a set of libraries for the Erlang programming language. In versions prior to OTP-27.3.4 (for OTP-27), OTP-26.2.5.12 (for OTP-26), and OTP-25.3.2.21 (for OTP-25), Erlang/OTP SSH fails to enforce strict KEX handshake hardening measures by allowing optional messages to be exchanged. This allows a Man-in-the-Middle attacker to inject these messages in a connection during the handshake. T

  2. Jan 12, 2026 · EUVD

    Updated

    Erlang/OTP is a set of libraries for the Erlang programming language. In versions prior to OTP-27.3.4 (for OTP-27), OTP-26.2.5.12 (for OTP-26), and OTP-25.3.2.21 (for OTP-25), Erlang/OTP SSH fails to enforce strict KEX handshake hardening measures by allowing optional messages to be exchanged. This allows a Man-in-the-Middle attacker to inject these messages in a connection during the handshake. T

Sources

  • CVE.orgVulnerability recordCVE-2025-46712

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2025-46712

    30-day exploitation probability 0.5%

    first.org
  • EUVDVulnerability recordEUVD-2025-14034

    Erlang/OTP is a set of libraries for the Erlang programming language. In versions prior to OTP-27.3.4 (for OTP-27), OTP-26.2.5.12 (for OTP-26), and OTP-25.3.2.21 (for OTP-25), Erlang/OTP SSH fails to enforce strict KEX handshake hardening measures by allowing optional messages to

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.