{"answers":{"affected":"1 open source package ship an affected version, including mastodon.","exploited":"There is no known exploitation of CVE-2026-46349 in the wild and no public exploit code.","fix":"Upgrade mastodon to 4.5.10 or later.","what":"CVE-2026-46349 is a medium-severity vulnerability in mastodon, published on 24 Jun 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-2026-46349 and fix it if it is affected.\n\nWhat it is: CVE-2026-46349 is a medium-severity vulnerability in mastodon, published on 24 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-46349 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- mastodon (Bitnami): affected from 4.5.0; fixed in 4.5.10\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-2026-46349/ (Markdown: https://insights.sbomify.com/CVE-2026-46349/index.md)","id":"CVE-2026-46349","markdown":"https://insights.sbomify.com/CVE-2026-46349/index.md","name":"CVE-2026-46349","record":{"aliases":["BIT-mastodon-2026-46349","GHSA-chgx-jx3p-rf73"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["security_bypass"],"network_reachable":"yes","non_default_config":false,"product_category":"Mastodon social network","requires_auth":"none","summary":"Attackers can spoof signed activities by restructuring JSON-LD graphs, bypassing Linked-Data Signature verification in Mastodon.","user_interaction":"not_required","vuln_class":"security_feature_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[],"cvss":{"score":5.3,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","version":"3.1"},"cwes":[{"id":"CWE-347","name":"Improper Verification of Cryptographic Signature"}],"description":"Mastodon is a free, open-source social network server based on ActivityPub. Prior to 4.5.10, 4.4.17, and 4.3.23, Mastodon's normalization of incoming activities signed with Linked-Data Signatures does not sufficiently protect the activities from a certain class of spoofing, allowing attackers to re-arrange a valid signed JSON-LD activity from a third-party actor to have it processed differently. This vulnerability is fixed in 4.5.10, 4.4.17, and 4.3.23.","ecosystems":["Bitnami"],"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":"Mastodon: LD-Signature Bypass via JSON-LD Named-Graph Restructuring","id":"CVE-2026-46349","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Bitnami","product":null,"products":[],"type":"security_feature_bypass","year":"2026"},"n_packages":1,"n_references":1,"next":{"headline":"BigBlueButton: Insecure Randomness allows to guess user's conference session token and impersonate them","id":"CVE-2026-46351"},"packages":[{"ecosystem":"Bitnami","fixed":["4.5.10"],"introduced":["4.5.0"],"last_affected":[],"package":"mastodon","purl":"pkg:bitnami/mastodon","source":"BIT-mastodon-2026-46349"}],"prev":{"headline":"Mastodon: SSRF Bypass via IPv6 Unspecified Address (::)","id":"CVE-2026-46348"},"products":["mastodon"],"published":"2026-06-24","related":[],"sources":[{"class":"attribution","licence":"Apache-2.0","name":"Bitnami","prefix":"BIT"},{"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":"yes","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-06-25","vendors":["mastodon"]},"summary":"Attackers can spoof signed activities by restructuring JSON-LD graphs, bypassing Linked-Data Signature verification in Mastodon.","url":"https://insights.sbomify.com/CVE-2026-46349/"}