{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-13426 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-13426 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-13426 is a medium-severity path traversal vulnerability in github.com/mattermost/mattermost/server/public, published on 26 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-13426 and fix it if it is affected.\n\nWhat it is: CVE-2026-13426 is a medium-severity path traversal vulnerability in github.com/mattermost/mattermost/server/public, published on 26 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-13426 in the wild and no public exploit code.\n\nAffected product: github.com/mattermost/mattermost/server/public. 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-2026-13426/ (Markdown: https://insights.sbomify.com/CVE-2026-13426/index.md)","id":"CVE-2026-13426","markdown":"https://insights.sbomify.com/CVE-2026-13426/index.md","name":"CVE-2026-13426","record":{"aliases":["GHSA-72v2-v53v-4qmm"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["other"],"network_reachable":"yes","non_default_config":false,"product_category":"Mattermost Go module","requires_auth":"low_privilege","summary":"An attacker can redirect API calls to unintended endpoints by crafting IDs with path traversal components in the Mattermost Go module.","user_interaction":"not_required","vuln_class":"path_traversal"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Mattermost","cpe":[],"cvss":{"score":5.4,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N","version":"3.1"},"cwes":[{"id":"CWE-22","name":"Improper Limitation of a Pathname to a Restricted Directory"}],"description":"The Mattermost Go module github.com/mattermost/mattermost/server/public versions \u003c v0.1.22 fail to validate path parameters when constructing API route paths which allows an attacker to redirect API calls to unintended endpoints via crafted IDs containing path traversal components. Mattermost Advisory ID: MMSA-2025-00532","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":null,"headline":"Client4 fails to validate path parameters","id":"CVE-2026-13426","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"path_traversal","year":"2026"},"n_packages":0,"n_references":1,"next":{"headline":"File upload in Post Export Import with Media","id":"CVE-2026-13430"},"packages":[],"prev":{"headline":"Database for CF7 \u003c= 1.2.6 - Unauthenticated Stored Cross-Site Scripting via Array Form Field Values","id":"CVE-2026-13425"},"products":["github.com/mattermost/mattermost/server/public"],"published":"2026-06-26","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"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":"2026-06-26","vendors":["Mattermost"]},"summary":"An attacker can redirect API calls to unintended endpoints by crafting IDs with path traversal components in the Mattermost Go module.","url":"https://insights.sbomify.com/CVE-2026-13426/"}