--- title: CVE-2026-48979 in the PSL library | daily.dev description: A CVE (CVE-2026-48979) has been disclosed affecting the PHP Standard Library (PSL), a third-party library providing typed, async-ready APIs for collections,... canonical: https://daily.dev/posts/cve-2026-48979-in-the-psl-library-fnnq0runw twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: CVE-2026-48979 in the PSL library | daily.dev og:description: A CVE (CVE-2026-48979) has been disclosed affecting the PHP Standard Library (PSL), a third-party library providing typed, async-ready APIs for collections,... og:url: https://daily.dev/posts/cve-2026-48979-in-the-psl-library-fnnq0runw og:image: https://api.daily.dev/og/posts/FnnQ0rUNw.png og:image:alt: CVE-2026-48979 in the PSL library 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. # CVE-2026-48979 in the PSL library **[PHP Dev](https://daily.dev/sources/phpdev)** · [@damienseguy](https://daily.dev/damienseguy) · 1 min read · 2 upvotes · 1 comments ## Summary A CVE (CVE-2026-48979) has been disclosed affecting the PHP Standard Library (PSL), a third-party library providing typed, async-ready APIs for collections, networking, I/O, cryptography, and more as safer alternatives to native PHP functions. Developers using PSL should review the CVE details and apply any available patches. ## Content The PSL, or PHP Standard Library, is a third party library that "provides a consistent, centralized, well-typed set of APIs covering async, collections, networking, I/O, cryptography, terminal UI, and more - replacing PHP functions and primitives with safer, async-ready alternatives that error predictably." PSL: [https://github.com/php-standard-library/php-standard-library](https://github.com/php-standard-library/php-standard-library) CVE: [https://www.cvedetails.com/cve/CVE-2026-48979/](https://www.cvedetails.com/cve/CVE-2026-48979/) [Details on the CVE: https://www.valtersit.com/cve/CVE-2026-48979/](https://www.valtersit.com/cve/CVE-2026-48979/) ## Community discussion Top comments from developers on daily.dev. **@damienseguy** · 0 upvotes > Quick precision: this affect a library called PSL, PHP Standard Library, which is not a PHP library (sic), but a third party. > > > PHP has the SPL (Standard PHP library), and this is not affected. ## Similar posts on daily.dev - [CVE-2026-0915: GNU C Library Fixes A Security Issue Present Since 1996](https://daily.dev/posts/cve-2026-0915-gnu-c-library-fixes-a-security-issue-present-since-1996-ktmmzbe6o) · Phoronix · 0 upvotes · 0 comments --- [View this post on daily.dev](https://daily.dev/posts/cve-2026-48979-in-the-psl-library-fnnq0runw) ```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":"DiscussionForumPosting","mainEntityOfPage":"https://daily.dev/posts/cve-2026-48979-in-the-psl-library-fnnq0runw","headline":"CVE-2026-48979 in the PSL library","text":"A CVE (CVE-2026-48979) has been disclosed affecting the PHP Standard Library (PSL), a third-party library providing typed, async-ready APIs for collections, networking, I/O, cryptography, and more as safer alternatives to native PHP functions. 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