--- title: Patch Package OTP 27.3.4.15 Released | daily.dev description: Erlang/OTP 27.3.4.15 patch release addresses multiple security vulnerabilities and bug fixes across several applications. Key security fixes include: a DoS... canonical: https://daily.dev/posts/patch-package-otp-27-3-4-15-released-tyuobuztj twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Patch Package OTP 27.3.4.15 Released | daily.dev og:description: Erlang/OTP 27.3.4.15 patch release addresses multiple security vulnerabilities and bug fixes across several applications. Key security fixes include: a DoS... og:url: https://daily.dev/posts/patch-package-otp-27-3-4-15-released-tyuobuztj og:image: https://api.daily.dev/og/posts/tyuObuzTj.png og:image:alt: Patch Package OTP 27.3.4.15 Released og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Patch Package OTP 27.3.4.15 Released **[Erlang Forums](https://daily.dev/sources/erlangforums)** · 6 min read · 0 upvotes · 0 comments ## Summary Erlang/OTP 27.3.4.15 patch release addresses multiple security vulnerabilities and bug fixes across several applications. Key security fixes include: a DoS mitigation in epmd (CVE-2026-42792), heap corruption fix in External Term Format decoding (CVE-2026-55737), a crafted ETF payload crash (CVE-2026-54890), zip path traversal vulnerability (CVE-2026-47078), TLS MITM prevention for pre-TLS-1.3 clients (CVE-2026-55953), DoS via certificate chain cycles in SSL (CVE-2026-58227), and exponential memory consumption via crafted policyMappings in TLS handshakes. Additional fixes cover crypto crashes, diameter infinite loops, megaco buffer overflow in the flex scanner C driver, and SSH DH key exchange hardening with stricter parameter validation. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [OTP 27.3.4.13 Released](https://daily.dev/posts/otp-27-3-4-13-released-7ejoshwng) · Erlang Forums · 0 upvotes · 0 comments --- Tags: [#security](https://daily.dev/tags/security), [#authentication](https://daily.dev/tags/authentication), [#cryptography](https://daily.dev/tags/cryptography), [#erlang](https://daily.dev/tags/erlang) [View this post on daily.dev](https://daily.dev/posts/patch-package-otp-27-3-4-15-released-tyuobuztj) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"Patch Package OTP 27.3.4.15 Released","url":"https://daily.dev/posts/patch-package-otp-27-3-4-15-released-tyuobuztj","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/patch-package-otp-27-3-4-15-released-tyuobuztj"},"datePublished":"2026-07-27T13:42:41.152Z","dateModified":"2026-07-27T13:43:07.840Z","description":"Erlang/OTP 27.3.4.15 patch release addresses multiple security vulnerabilities and bug fixes across several applications. 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