{"answers":{"affected":"It affects 2 products.","exploited":"There is no known exploitation of CVE-2026-12891 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2026-12891 is a medium-severity vulnerability in Gstreamer Gstreamer, published on 23 Jun 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-2026-12891 and fix it if it is affected.\n\nWhat it is: CVE-2026-12891 is a medium-severity vulnerability in Gstreamer Gstreamer, published on 23 Jun 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-2026-12891 in the wild and no public exploit code.\n\nAffected product: Gstreamer Gstreamer. 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-2026-12891/ (Markdown: https://insights.sbomify.com/CVE-2026-12891/index.md)","id":"CVE-2026-12891","markdown":"https://insights.sbomify.com/CVE-2026-12891/index.md","name":"CVE-2026-12891","record":{"aliases":["DEBIAN-CVE-2026-12891","ECHO-fe2f-08ad-190b","GHSA-9j3r-2vv4-g5x8","UBUNTU-CVE-2026-12891"],"analysis":{"component_type":"library","fix_type":"patch","impacts":["data_read"],"network_reachable":"yes","non_default_config":false,"product_category":"GStreamer media library","requires_auth":"none","summary":"Attackers can leak limited memory contents by crafting malicious H.266 video files processed by GStreamer applications, exposing sensitive application data.","user_interaction":"required","vuln_class":"information_disclosure"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"redhat","cpe":[{"product":"gstreamer","vendor":"gstreamer"},{"product":"enterprise_linux","vendor":"redhat"}],"cvss":{"score":4.3,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N","version":"3.1"},"cwes":[{"id":"CWE-125","name":"Out-of-bounds Read"}],"description":"A flaw was found in the GStreamer gst-plugins-bad package. When processing a malformed H.266/VVC video stream with a crafted aspect ratio indicator value, the H.266 parser performs an out-of-bounds read of up to 8 bytes from adjacent memory. This flaw allows an attacker to craft a malicious H.266 video file or stream that, when processed by a GStreamer-based application, could leak limited memory contents through video metadata, potentially exposing sensitive information from the application's address space.","ecosystems":[],"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":"Information disclosure in Red Hat Enterprise Linux 10","id":"CVE-2026-12891","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"gstreamer:gstreamer","products":["gstreamer:gstreamer","redhat:enterprise_linux"],"type":"information_disclosure","year":"2026"},"n_packages":0,"n_references":3,"next":{"headline":"Gstreamer1-plugins-bad-free: gstreamer1-plugins-bad: 1-byte heap out-of-bounds read in h.264 nal extension slice parser","id":"CVE-2026-12892"},"packages":[],"prev":{"headline":"HTML injection in the Canarytoken Google Chat notification","id":"CVE-2026-12888"},"products":["Red Hat Enterprise Linux 10","Red Hat Enterprise Linux 8","Red Hat Enterprise Linux 9"],"published":"2026-06-23","related":[{"cvss_score":8.8,"headline":"GStreamer rtpqdm2depay Out-Of-Bounds Write Remote Code Execution Vulnerability","id":"CVE-2026-3083","kev_date_added":null,"published":"2026-03-13"},{"cvss_score":8.8,"headline":"GStreamer rtpqdm2depay Heap-based Buffer Overflow Remote Code Execution Vulnerability","id":"CVE-2026-3085","kev_date_added":null,"published":"2026-03-13"},{"cvss_score":8.8,"headline":"GStreamer PGS File Parsing Heap-based Buffer Overflow Remote Code Execution Vulnerability","id":"CVE-2023-37328","kev_date_added":null,"published":"2024-05-03"},{"cvss_score":8.8,"headline":"GStreamer SRT File Parsing Heap-based Buffer Overflow Remote Code Execution Vulnerability","id":"CVE-2023-37329","kev_date_added":null,"published":"2024-05-03"},{"cvss_score":8.8,"headline":"GStreamer RealMedia File Parsing Integer Overflow Remote Code Execution Vulnerability","id":"CVE-2023-38103","kev_date_added":null,"published":"2024-05-03"},{"cvss_score":8.8,"headline":"GStreamer RealMedia File Parsing Integer Overflow Remote Code Execution Vulnerability","id":"CVE-2023-38104","kev_date_added":null,"published":"2024-05-03"},{"cvss_score":8.8,"headline":"GStreamer MXF File Parsing Integer Overflow Remote Code Execution Vulnerability","id":"CVE-2023-40474","kev_date_added":null,"published":"2024-05-03"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"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":"2026-09-10","vendors":["Red Hat"]},"summary":"Attackers can leak limited memory contents by crafting malicious H.266 video files processed by GStreamer applications, exposing sensitive application data.","url":"https://insights.sbomify.com/CVE-2026-12891/"}