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Is Erlang/OTP 23.3.4.20 patched?

Erlang · cycle 23.3
23.3.4.200/100Critical · exploited

Current stable (29.1.2): 100/100

Minimum safe version27.3.4.15

23.3.4.20 has 9 open critical-or-high vulnerabilities. Run 27.3.4.15 or later to clear them. See what 27.3.4.15 fixes →

Upgrade impact: Major upgrade (4 major versions). Crossing a major version usually means breaking changes. Review the vendor’s upgrade / migration guide and test before you roll it out.

Health score0/100
Open issues22
Exploited now1
Cycle 23.3 EOL—
Latest release29.1.2

Summary iPlain-English security status for Erlang/OTP 23.3.4.20, built from its CVEs, active-exploitation data, end-of-life date and latest release.

Erlang/OTP 23.3.4.20 is part of the 23.3 release line. 1 actively-exploited vulnerability affects it (CISA KEV). The minimum safe version is 27.3.4.15 — upgrade to it or later to clear the open critical/high issues. The latest supported Erlang/OTP release is 29.1.2.

Known issues affecting 23.3.4.20

Exploited first, then by exploitation probability.

CVE-2025-32433 CRITICAL exploited EPSS 99% → fixed in 27.3.3 CVE-2026-23943 MEDIUM EPSS 1% → fixed in 28.4.1 CVE-2026-28808 CRITICAL EPSS 1% → fixed in 28.4.2 CVE-2026-49759 HIGH EPSS 0% → fixed in 29.0.2 CVE-2026-23941 CRITICAL EPSS 0% → fixed in 28.4.1 CVE-2026-55952 HIGH EPSS 0% → fixed in 29.0.3 CVE-2026-42792 HIGH EPSS 0% → fixed in 29.0.4 CVE-2026-58227 HIGH EPSS 0% → fixed in 29.0.4 CVE-2026-23942 MEDIUM EPSS 0% → fixed in 28.4.1 CVE-2026-42789 MEDIUM EPSS 0% → fixed in 29.0.1 CVE-2026-32147 MEDIUM EPSS 0% → fixed in 28.4.3 CVE-2026-42790 HIGH EPSS 0% → fixed in 29.0.1 CVE-2026-48856 MEDIUM EPSS 0% → fixed in 29.0.2 CVE-2026-54886 MEDIUM EPSS 0% → fixed in 29.0.3 CVE-2026-48855 MEDIUM EPSS 0% → fixed in 29.0.2 CVE-2026-28810 LOW EPSS 0% → fixed in 28.4.2 CVE-2026-53422 MEDIUM EPSS 0% → fixed in 29.0.3 CVE-2026-54887 MEDIUM EPSS 0% → fixed in 29.0.3 CVE-2026-48858 MEDIUM EPSS 0% → fixed in 29.0.2 CVE-2026-55953 HIGH EPSS 0% → fixed in 29.0.4

Other Erlang/OTP versions

Check another release line of Erlang/OTP.

Erlang/OTP 29.1.2Erlang/OTP 28.5.0.8Erlang/OTP 27.3.4.19Erlang/OTP 26.2.5.21Erlang/OTP 25.3.2.21Erlang/OTP 24.3.4.17Erlang/OTP 22.3.4.27Erlang/OTP 21.3.8.24Erlang/OTP 20.3.8.26Erlang/OTP 19.3.6.13Erlang/OTP 18.3.4.11Erlang/OTP 17.5.6.10

Frequently asked

Is Erlang/OTP 23.3.4.20 patched?

No — 1 actively-exploited vulnerability affects Erlang/OTP 23.3.4.20. Upgrade to at least 27.3.4.15.

What version should I upgrade Erlang/OTP 23.3.4.20 to?

Upgrade Erlang/OTP 23.3.4.20 to at least 27.3.4.15 to clear its 9 open critical-or-high vulnerabilities.

What is the latest version of Erlang/OTP?

The latest supported Erlang/OTP release is 29.1.2.

Is Erlang/OTP 23.3.4.20 still receiving security updates?

Yes — the 23.3 line is still supported and receiving security updates. The latest release is 29.1.2.

Informational only, from public data (NVD · CISA KEV · EPSS · endoflife.date), and can lag or miss vendor-specific fixes. Always confirm against Erlang's official advisory before you patch or upgrade.