{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-89011 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-89011 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-89011 is a high-severity unsafe deserialization vulnerability in isomorphic-git, published on 10 Sep 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-2026-89011 and fix it if it is affected.\n\nWhat it is: CVE-2026-89011 is a high-severity unsafe deserialization vulnerability in isomorphic-git, published on 10 Sep 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-2026-89011 in the wild and no public exploit code.\n\nAffected product: isomorphic-git. 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-2026-89011/ (Markdown: https://insights.sbomify.com/CVE-2026-89011/index.md)","id":"CVE-2026-89011","markdown":"https://insights.sbomify.com/CVE-2026-89011/index.md","name":"CVE-2026-89011","record":{"aliases":["GHSA-83vg-jxvh-fx76"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["data_read","security_bypass"],"network_reachable":"yes","non_default_config":false,"product_category":"Git JavaScript library","requires_auth":"none","summary":"A malicious Git server can pollute Object.prototype via crafted ref names, causing credential leakage and network rerouting in isomorphic-git.","user_interaction":"required","vuln_class":"deserialization"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"VulnCheck","cpe":[],"cvss":{"score":7.1,"severity":"high","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-1321","name":"Improperly Controlled Modification of Object Prototype Attributes"}],"description":"isomorphic-git before 1.42.0 contains a prototype pollution vulnerability in the getRemoteInfo function that allows a malicious Git server operator to pollute Object.prototype by advertising crafted ref names containing '__proto__' path segments during ref negotiation. Attackers controlling a Git server can advertise a specially crafted ref such as '__proto__/corsProxy' to reroute all subsequent network operations through an attacker-controlled proxy, causing isomorphic-git to invoke the victim's onAuth callback and transmit credentials to the attacker when the victim calls getRemoteInfo with an attacker-supplied URL.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":false,"headline":"isomorphic-git \u003c 1.42.0 Prototype Pollution via getRemoteInfo","id":"CVE-2026-89011","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"deserialization","year":"2026"},"n_packages":0,"n_references":5,"next":{"headline":"Dolibarr 24.0.0 \u003c 24.0.1 SQL Filter Denylist Bypass via sqlfilters Parameter","id":"CVE-2026-89012"},"packages":[],"prev":{"headline":"WAVLINK WN535M1/WN535M3 Unauthenticated OS Command Injection via sync_server","id":"CVE-2026-89010"},"products":["isomorphic-git"],"published":"2026-09-10","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":"yes","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-09-11","vendors":["isomorphic-git"]},"summary":"A malicious Git server can pollute Object.prototype via crafted ref names, causing credential leakage and network rerouting in isomorphic-git.","url":"https://insights.sbomify.com/CVE-2026-89011/"}