{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-33636 in the wild and no public exploit code.","fix":"Upgrade to a fixed version.","what":"CVE-2026-33636 is a high-severity memory corruption vulnerability in Libpng Libpng, published on 26 Mar 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2026-33636 and fix it if it is affected.\n\nWhat it is: CVE-2026-33636 is a high-severity memory corruption vulnerability in Libpng Libpng, published on 26 Mar 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.\nExploitation: There is no known exploitation of CVE-2026-33636 in the wild and no public exploit code.\n\nAffected product: Libpng Libpng. No package-level version data is available, so check the vendor advisory linked from the reference page.\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-33636/ (Markdown: https://insights.sbomify.com/CVE-2026-33636/index.md)","id":"CVE-2026-33636","markdown":"https://insights.sbomify.com/CVE-2026-33636/index.md","name":"CVE-2026-33636","record":{"aliases":["A-496616027","ALPINE-CVE-2026-33636","ALSA-2026:14790","ALSA-2026:14791","ASB-A-496616027","AZL-80993","AZL-81312","AZL-81348","BELL-CVE-2026-33636","CLEANSTART-2026-UY34738","DEBIAN-CVE-2026-33636","ECHO-42f8-ed7b-d9f3","GHSA-wjr5-c57x-95m2","JLSEC-2026-96","MINI-7h7v-xhfw-78q6","RHSA-2026:14790","RHSA-2026:14791","RHSA-2026:17524","RHSA-2026:17567","RHSA-2026:17603","RHSA-2026:17642","RHSA-2026:17685","RLSA-2026:14790","RLSA-2026:14791","ROOT-OS-ALPINE-315-CVE-2026-33636","UBUNTU-CVE-2026-33636"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["code_execution","denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"PNG image library","requires_auth":"none","summary":"An out-of-bounds read and write in libpng's ARM NEON palette expansion allows attackers to execute code or cause denial of service via crafted PNG files.","user_interaction":"required","vuln_class":"memory_corruption"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"libpng","vendor":"libpng"}],"cvss":{"score":7.6,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H","version":"3.1"},"cwes":[{"id":"CWE-787","name":"Out-of-bounds Write"},{"id":"CWE-125","name":"Out-of-bounds Read"}],"description":"LIBPNG is a reference library for use in applications that read, create, and manipulate PNG (Portable Network Graphics) raster image files. In versions 1.6.36 through 1.6.55, an out-of-bounds read and write exists in libpng's ARM/AArch64 Neon-optimized palette expansion path. When expanding 8-bit paletted rows to RGB or RGBA, the Neon loop processes a final partial chunk without verifying that enough input pixels remain. Because the implementation works backward from the end of the row, the final iteration dereferences pointers before the start of the row buffer (OOB read) and writes expanded pixel data to the same underflowed positions (OOB write). This is reachable via normal decoding of attacker-controlled PNG input if Neon is enabled. Version 1.6.56 fixes the issue.","ecosystems":["AlmaLinux:10","AlmaLinux:9","Red Hat:enterprise_linux:10.1","Red Hat:enterprise_linux:9::appstream","Red Hat:enterprise_linux:9::baseos","Red Hat:enterprise_linux_eus:10.0","Red Hat:rhel_e4s:9.0::appstream","Red Hat:rhel_e4s:9.0::baseos","Red Hat:rhel_e4s:9.2::appstream","Red Hat:rhel_e4s:9.2::baseos","Red Hat:rhel_eus:9.4::appstream","Red Hat:rhel_eus:9.4::baseos","Red Hat:rhel_eus:9.6::appstream","Red Hat:rhel_eus:9.6::baseos","Rocky Linux:10","Rocky Linux:9"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"LIBPNG has ARM NEON Palette Expansion Out-of-Bounds Read on AArch64","id":"CVE-2026-33636","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"libpng:libpng","products":["libpng:libpng"],"type":"memory_corruption","year":"2026"},"n_packages":37,"n_references":3,"next":{"headline":"Faraday: Protocol-relative URI objects still bypass host scoping (possible incomplete fix for GHSA-33mh-2634-fwr2)","id":"CVE-2026-33637"},"packages":[{"ecosystem":"AlmaLinux:10","fixed":["2:1.6.40-8.el10_1.3"],"introduced":["0"],"last_affected":[],"package":"libpng","purl":"pkg:rpm/almalinux/libpng","source":"ALSA-2026:14790"},{"ecosystem":"AlmaLinux:10","fixed":["2:1.6.40-8.el10_1.3"],"introduced":["0"],"last_affected":[],"package":"libpng-devel","purl":"pkg:rpm/almalinux/libpng-devel","source":"ALSA-2026:14790"},{"ecosystem":"AlmaLinux:9","fixed":["2:1.6.37-12.el9_7.3"],"introduced":["0"],"last_affected":[],"package":"libpng","purl":"pkg:rpm/almalinux/libpng","source":"ALSA-2026:14791"},{"ecosystem":"AlmaLinux:9","fixed":["2:1.6.37-12.el9_7.3"],"introduced":["0"],"last_affected":[],"package":"libpng-devel","purl":"pkg:rpm/almalinux/libpng-devel","source":"ALSA-2026:14791"},{"ecosystem":"Red Hat:enterprise_linux:10.1","fixed":["2:1.6.40-8.el10_1.3"],"introduced":["0"],"last_affected":[],"package":"libpng","purl":"pkg:rpm/redhat/libpng","source":"RHSA-2026:14790"},{"ecosystem":"Red Hat:enterprise_linux:10.1","fixed":["2:1.6.40-8.el10_1.3"],"introduced":["0"],"last_affected":[],"package":"libpng-debuginfo","purl":"pkg:rpm/redhat/libpng-debuginfo","source":"RHSA-2026:14790"},{"ecosystem":"Red Hat:enterprise_linux:10.1","fixed":["2:1.6.40-8.el10_1.3"],"introduced":["0"],"last_affected":[],"package":"libpng-debugsource","purl":"pkg:rpm/redhat/libpng-debugsource","source":"RHSA-2026:14790"},{"ecosystem":"Red Hat:enterprise_linux:10.1","fixed":["2:1.6.40-8.el10_1.3"],"introduced":["0"],"last_affected":[],"package":"libpng-devel","purl":"pkg:rpm/redhat/libpng-devel","source":"RHSA-2026:14790"},{"ecosystem":"Red Hat:enterprise_linux:10.1","fixed":["2:1.6.40-8.el10_1.3"],"introduced":["0"],"last_affected":[],"package":"libpng-devel-debuginfo","purl":"pkg:rpm/redhat/libpng-devel-debuginfo","source":"RHSA-2026:14790"},{"ecosystem":"Red Hat:enterprise_linux:10.1","fixed":["2:1.6.40-8.el10_1.3"],"introduced":["0"],"last_affected":[],"package":"libpng-tools-debuginfo","purl":"pkg:rpm/redhat/libpng-tools-debuginfo","source":"RHSA-2026:14790"},{"ecosystem":"Red Hat:enterprise_linux:9::appstream","fixed":["2:1.6.37-12.el9_7.3"],"introduced":["0"],"last_affected":[],"package":"libpng","purl":"pkg:rpm/redhat/libpng","source":"RHSA-2026:14791"},{"ecosystem":"Red Hat:enterprise_linux:9::appstream","fixed":["2:1.6.37-12.el9_7.3"],"introduced":["0"],"last_affected":[],"package":"libpng-debuginfo","purl":"pkg:rpm/redhat/libpng-debuginfo","source":"RHSA-2026:14791"},{"ecosystem":"Red Hat:enterprise_linux:9::appstream","fixed":["2:1.6.37-12.el9_7.3"],"introduced":["0"],"last_affected":[],"package":"libpng-debugsource","purl":"pkg:rpm/redhat/libpng-debugsource","source":"RHSA-2026:14791"},{"ecosystem":"Red Hat:enterprise_linux:9::appstream","fixed":["2:1.6.37-12.el9_7.3"],"introduced":["0"],"last_affected":[],"package":"libpng-devel","purl":"pkg:rpm/redhat/libpng-devel","source":"RHSA-2026:14791"},{"ecosystem":"Red Hat:enterprise_linux:9::appstream","fixed":["2:1.6.37-12.el9_7.3"],"introduced":["0"],"last_affected":[],"package":"libpng-devel-debuginfo","purl":"pkg:rpm/redhat/libpng-devel-debuginfo","source":"RHSA-2026:14791"},{"ecosystem":"Red Hat:enterprise_linux:9::appstream","fixed":["2:1.6.37-12.el9_7.3"],"introduced":["0"],"last_affected":[],"package":"libpng-tools-debuginfo","purl":"pkg:rpm/redhat/libpng-tools-debuginfo","source":"RHSA-2026:14791"},{"ecosystem":"Red Hat:enterprise_linux:9::baseos","fixed":["2:1.6.37-12.el9_7.3"],"introduced":["0"],"last_affected":[],"package":"libpng","purl":"pkg:rpm/redhat/libpng","source":"RHSA-2026:14791"},{"ecosystem":"Red Hat:enterprise_linux:9::baseos","fixed":["2:1.6.37-12.el9_7.3"],"introduced":["0"],"last_affected":[],"package":"libpng-debuginfo","purl":"pkg:rpm/redhat/libpng-debuginfo","source":"RHSA-2026:14791"},{"ecosystem":"Red Hat:enterprise_linux:9::baseos","fixed":["2:1.6.37-12.el9_7.3"],"introduced":["0"],"last_affected":[],"package":"libpng-debugsource","purl":"pkg:rpm/redhat/libpng-debugsource","source":"RHSA-2026:14791"},{"ecosystem":"Red Hat:enterprise_linux:9::baseos","fixed":["2:1.6.37-12.el9_7.3"],"introduced":["0"],"last_affected":[],"package":"libpng-devel-debuginfo","purl":"pkg:rpm/redhat/libpng-devel-debuginfo","source":"RHSA-2026:14791"},{"ecosystem":"Red Hat:enterprise_linux:9::baseos","fixed":["2:1.6.37-12.el9_7.3"],"introduced":["0"],"last_affected":[],"package":"libpng-tools-debuginfo","purl":"pkg:rpm/redhat/libpng-tools-debuginfo","source":"RHSA-2026:14791"},{"ecosystem":"Red Hat:enterprise_linux_eus:10.0","fixed":["2:1.6.40-8.el10_0.3"],"introduced":["0"],"last_affected":[],"package":"libpng","purl":"pkg:rpm/redhat/libpng","source":"RHSA-2026:17567"},{"ecosystem":"Red Hat:enterprise_linux_eus:10.0","fixed":["2:1.6.40-8.el10_0.3"],"introduced":["0"],"last_affected":[],"package":"libpng-devel","purl":"pkg:rpm/redhat/libpng-devel","source":"RHSA-2026:17567"},{"ecosystem":"Red Hat:rhel_e4s:9.0::appstream","fixed":["2:1.6.37-12.el9_0.3"],"introduced":["0"],"last_affected":[],"package":"libpng","purl":"pkg:rpm/redhat/libpng","source":"RHSA-2026:17685"},{"ecosystem":"Red Hat:rhel_e4s:9.0::appstream","fixed":["2:1.6.37-12.el9_0.3"],"introduced":["0"],"last_affected":[],"package":"libpng-devel","purl":"pkg:rpm/redhat/libpng-devel","source":"RHSA-2026:17685"},{"ecosystem":"Red Hat:rhel_e4s:9.0::baseos","fixed":["2:1.6.37-12.el9_0.3"],"introduced":["0"],"last_affected":[],"package":"libpng","purl":"pkg:rpm/redhat/libpng","source":"RHSA-2026:17685"},{"ecosystem":"Red Hat:rhel_e4s:9.2::appstream","fixed":["2:1.6.37-12.el9_2.3"],"introduced":["0"],"last_affected":[],"package":"libpng","purl":"pkg:rpm/redhat/libpng","source":"RHSA-2026:17642"},{"ecosystem":"Red Hat:rhel_e4s:9.2::appstream","fixed":["2:1.6.37-12.el9_2.3"],"introduced":["0"],"last_affected":[],"package":"libpng-devel","purl":"pkg:rpm/redhat/libpng-devel","source":"RHSA-2026:17642"},{"ecosystem":"Red Hat:rhel_e4s:9.2::baseos","fixed":["2:1.6.37-12.el9_2.3"],"introduced":["0"],"last_affected":[],"package":"libpng","purl":"pkg:rpm/redhat/libpng","source":"RHSA-2026:17642"},{"ecosystem":"Red Hat:rhel_eus:9.4::appstream","fixed":["2:1.6.37-12.el9_4.3"],"introduced":["0"],"last_affected":[],"package":"libpng","purl":"pkg:rpm/redhat/libpng","source":"RHSA-2026:17603"},{"ecosystem":"Red Hat:rhel_eus:9.4::appstream","fixed":["2:1.6.37-12.el9_4.3"],"introduced":["0"],"last_affected":[],"package":"libpng-devel","purl":"pkg:rpm/redhat/libpng-devel","source":"RHSA-2026:17603"},{"ecosystem":"Red Hat:rhel_eus:9.4::baseos","fixed":["2:1.6.37-12.el9_4.3"],"introduced":["0"],"last_affected":[],"package":"libpng","purl":"pkg:rpm/redhat/libpng","source":"RHSA-2026:17603"},{"ecosystem":"Red Hat:rhel_eus:9.6::appstream","fixed":["2:1.6.37-12.el9_6.3"],"introduced":["0"],"last_affected":[],"package":"libpng","purl":"pkg:rpm/redhat/libpng","source":"RHSA-2026:17524"},{"ecosystem":"Red Hat:rhel_eus:9.6::appstream","fixed":["2:1.6.37-12.el9_6.3"],"introduced":["0"],"last_affected":[],"package":"libpng-devel","purl":"pkg:rpm/redhat/libpng-devel","source":"RHSA-2026:17524"},{"ecosystem":"Red Hat:rhel_eus:9.6::baseos","fixed":["2:1.6.37-12.el9_6.3"],"introduced":["0"],"last_affected":[],"package":"libpng","purl":"pkg:rpm/redhat/libpng","source":"RHSA-2026:17524"},{"ecosystem":"Rocky Linux:10","fixed":["2:1.6.40-8.el10_1.3"],"introduced":["0"],"last_affected":[],"package":"libpng","purl":"pkg:rpm/rocky-linux/libpng?distro=rocky-linux-10\u0026epoch=2","source":"RLSA-2026:14790"},{"ecosystem":"Rocky Linux:9","fixed":["2:1.6.37-12.el9_7.3"],"introduced":["0"],"last_affected":[],"package":"libpng","purl":"pkg:rpm/rocky-linux/libpng?distro=rocky-linux-9\u0026epoch=2","source":"RLSA-2026:14791"}],"prev":{"headline":"iCalendar has ICS injection via unsanitized URI property values","id":"CVE-2026-33635"},"products":["libpng"],"published":"2026-03-26","related":[{"cvss_score":9.8,"headline":"Denial of service in n/a","id":"CVE-2017-12652","kev_date_added":null,"published":"2019-07-10"},{"cvss_score":8.8,"headline":"Out-of-bounds write in libpng","id":"CVE-2018-14550","kev_date_added":null,"published":"2019-07-10"},{"cvss_score":8.3,"headline":"LIBPNG has a heap buffer overflow in png_set_quantize","id":"CVE-2026-25646","kev_date_added":null,"published":"2026-02-10"},{"cvss_score":7.5,"headline":"LIBPNG has use-after-free via pointer aliasing in `png_set_tRNS` and `png_set_PLTE`","id":"CVE-2026-33416","kev_date_added":null,"published":"2026-03-26"},{"cvss_score":7.5,"headline":"Null dereference in n/a","id":"CVE-2016-10087","kev_date_added":null,"published":"2017-01-30"},{"cvss_score":7.5,"headline":"Memory corruption in n/a","id":"CVE-2011-3464","kev_date_added":null,"published":"2012-07-22"}],"sources":[{"class":"attribution","licence":"MIT","name":"AlmaLinux","prefix":"ALSA"},{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"Red Hat","prefix":"RHSA"},{"class":"attribution","licence":"BSD","name":"Rocky Linux","prefix":"RLSA"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-03-26","vendors":["pnggroup"]},"summary":"An out-of-bounds read and write in libpng's ARM NEON palette expansion allows attackers to execute code or cause denial of service via crafted PNG files.","url":"https://insights.sbomify.com/CVE-2026-33636/"}