{"answers":{"affected":"It affects 2 products.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-34757 exists.","fix":"Upgrade to a fixed version.","what":"CVE-2026-34757 is a medium-severity use after free vulnerability in Debian Debian Linux, published on 9 Apr 2026. It can only be exploited from the same machine or local network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-34757 and fix it if it is affected.\n\nWhat it is: CVE-2026-34757 is a medium-severity use after free vulnerability in Debian Debian Linux, published on 9 Apr 2026. It can only be exploited from the same machine or local network, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-34757 exists.\n\nAffected product: Debian Debian Linux. 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-2026-34757/ (Markdown: https://insights.sbomify.com/CVE-2026-34757/index.md)","id":"CVE-2026-34757","markdown":"https://insights.sbomify.com/CVE-2026-34757/index.md","name":"CVE-2026-34757","record":{"aliases":["ALPINE-CVE-2026-34757","AZL-82643","AZL-85478","AZL-85481","AZL-85484","AZL-85487","AZL-85490","AZL-85493","BELL-CVE-2026-34757","CLEANSTART-2026-OQ43159","CLSA-2026-1778891359","CLSA-2026-1778928586","CLSA-2026-1779127797","CLSA-2026-1779129500","DEBIAN-CVE-2026-34757","ECHO-7edb-b098-20d5","GHSA-6fr7-g8h7-v645","JLSEC-2026-498","MINI-5xjv-chvq-q5f9","OESA-2026-2149","RHSA-2026:13719","SUSE-SU-2026:1601-1","SUSE-SU-2026:1602-1","SUSE-SU-2026:2057-1","SUSE-SU-2026:21239-1","SUSE-SU-2026:21251-1","SUSE-SU-2026:21262-1","SUSE-SU-2026:21364-1","UBUNTU-CVE-2026-34757","openSUSE-SU-2026:10564-1","openSUSE-SU-2026:20593-1"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["data_read","data_modify"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"PNG image library","requires_auth":"none","summary":"Attackers can trigger a use-after-free in libpng setters to leak heap data or corrupt chunk metadata by passing freed pointers back to the library.","user_interaction":"not_required","vuln_class":"use_after_free"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"debian_linux","vendor":"debian"},{"product":"libpng","vendor":"libpng"}],"cvss":{"score":5.1,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","version":"3.1"},"cwes":[{"id":"CWE-416","name":"Use After Free"}],"description":"LIBPNG is a reference library for use in applications that read, create, and manipulate PNG (Portable Network Graphics) raster image files. From 1.0.9 to before 1.6.57, passing a pointer obtained from png_get_PLTE, png_get_tRNS, or png_get_hIST back into the corresponding setter on the same png_struct/png_info pair causes the setter to read from freed memory and copy its contents into the replacement buffer. The setter frees the internal buffer before copying from the caller-supplied pointer, which now dangles. The freed region may contain stale data (producing silently corrupted chunk metadata) or data from subsequent heap allocations (leaking unrelated heap contents into the chunk struct). This vulnerability is fixed in 1.6.57.","ecosystems":["Red Hat:hummingbird:1","SUSE:Linux Enterprise Module for Basesystem 15 SP7","SUSE:Linux Enterprise Server LTSS Extended Security 12 SP5","SUSE:Linux Micro 6.0","SUSE:Linux Micro 6.1","SUSE:Linux Micro 6.2","openSUSE:Leap 16.0","openSUSE:Tumbleweed"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":true,"headline":"Use after free in libpng","id":"CVE-2026-34757","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"debian:debian_linux","products":["debian:debian_linux","libpng:libpng"],"type":"use_after_free","year":"2026"},"n_packages":11,"n_references":5,"next":{"headline":"OneUptime: Missing Authentication on Notification Endpoints","id":"CVE-2026-34758"},"packages":[{"ecosystem":"Red Hat:hummingbird:1","fixed":["0:1.6.57-0.1.hum1"],"introduced":["0"],"last_affected":[],"package":"libpng","purl":"pkg:rpm/redhat/libpng","source":"RHSA-2026:13719"},{"ecosystem":"Red Hat:hummingbird:1","fixed":["0:1.6.57-0.1.hum1"],"introduced":["0"],"last_affected":[],"package":"libpng-devel","purl":"pkg:rpm/redhat/libpng-devel","source":"RHSA-2026:13719"},{"ecosystem":"Red Hat:hummingbird:1","fixed":["0:1.6.57-0.1.hum1"],"introduced":["0"],"last_affected":[],"package":"libpng-static","purl":"pkg:rpm/redhat/libpng-static","source":"RHSA-2026:13719"},{"ecosystem":"Red Hat:hummingbird:1","fixed":["0:1.6.57-0.1.hum1"],"introduced":["0"],"last_affected":[],"package":"libpng-tools","purl":"pkg:rpm/redhat/libpng-tools","source":"RHSA-2026:13719"},{"ecosystem":"SUSE:Linux Enterprise Module for Basesystem 15 SP7","fixed":["1.6.40-150600.3.20.1"],"introduced":["0"],"last_affected":[],"package":"libpng16","purl":"pkg:rpm/suse/libpng16\u0026distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP7","source":"SUSE-SU-2026:1602-1"},{"ecosystem":"SUSE:Linux Enterprise Server LTSS Extended Security 12 SP5","fixed":["1.6.8-15.24.1"],"introduced":["0"],"last_affected":[],"package":"libpng16","purl":"pkg:rpm/suse/libpng16\u0026distro=SUSE%20Linux%20Enterprise%20Server%20LTSS%20Extended%20Security%2012%20SP5","source":"SUSE-SU-2026:1601-1"},{"ecosystem":"SUSE:Linux Micro 6.0","fixed":["1.6.43-5.1"],"introduced":["0"],"last_affected":[],"package":"libpng16","purl":"pkg:rpm/suse/libpng16\u0026distro=SUSE%20Linux%20Micro%206.0","source":"SUSE-SU-2026:21251-1"},{"ecosystem":"SUSE:Linux Micro 6.1","fixed":["1.6.43-slfo.1.1_5.1"],"introduced":["0"],"last_affected":[],"package":"libpng16","purl":"pkg:rpm/suse/libpng16\u0026distro=SUSE%20Linux%20Micro%206.1","source":"SUSE-SU-2026:21262-1"},{"ecosystem":"SUSE:Linux Micro 6.2","fixed":["1.6.44-160000.7.1"],"introduced":["0"],"last_affected":[],"package":"libpng16","purl":"pkg:rpm/suse/libpng16\u0026distro=SUSE%20Linux%20Micro%206.2","source":"SUSE-SU-2026:21239-1"},{"ecosystem":"openSUSE:Leap 16.0","fixed":["1.6.44-160000.7.1"],"introduced":["0"],"last_affected":[],"package":"libpng16","purl":"pkg:rpm/opensuse/libpng16\u0026distro=openSUSE%20Leap%2016.0","source":"openSUSE-SU-2026:20593-1"},{"ecosystem":"openSUSE:Tumbleweed","fixed":["1.6.57-1.1"],"introduced":["0"],"last_affected":[],"package":"libpng16","purl":"pkg:rpm/opensuse/libpng16\u0026distro=openSUSE%20Tumbleweed","source":"openSUSE-SU-2026:10564-1"}],"prev":{"headline":"vLLM Affected by Unauthenticated OOM Denial of Service via Unbounded `n` Parameter in OpenAI API Server","id":"CVE-2026-34756"},"products":["libpng"],"published":"2026-04-09","related":[{"cvss_score":10,"headline":"ProFTPD Improper Access Control","id":"CVE-2015-3306","kev_date_added":"2026-10-08","published":"2015-05-18"},{"cvss_score":9.9,"headline":"RoundCube Webmail Deserialization of Untrusted Data","id":"CVE-2025-49113","kev_date_added":"2026-02-20","published":"2025-06-02"},{"cvss_score":9.8,"headline":"GNU InetUtils Argument Injection","id":"CVE-2026-24061","kev_date_added":"2026-01-26","published":"2026-01-21"},{"cvss_score":9.8,"headline":"Linux Kernel Improper Check for Unusual or Exceptional Conditions","id":"CVE-2025-39682","kev_date_added":"2026-09-18","published":"2025-09-05"},{"cvss_score":9.8,"headline":"Mozilla Firefox Use-After-Free","id":"CVE-2024-9680","kev_date_added":"2024-10-15","published":"2024-10-09"},{"cvss_score":9.8,"headline":"RARLAB UnRAR Directory Traversal","id":"CVE-2022-30333","kev_date_added":"2022-08-09","published":"2022-05-09"},{"cvss_score":9.8,"headline":"Roundcube Webmail SQL Injection","id":"CVE-2021-44026","kev_date_added":"2023-06-22","published":"2021-11-19"}],"sources":[{"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":"CC BY 4.0","name":"SUSE","prefix":"SUSE"},{"class":"attribution","licence":"CC BY 4.0","name":"SUSE","prefix":"openSUSE"},{"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":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-05-09","vendors":["pnggroup"]},"summary":"Attackers can trigger a use-after-free in libpng setters to leak heap data or corrupt chunk metadata by passing freed pointers back to the library.","url":"https://insights.sbomify.com/CVE-2026-34757/"}