{"answers":{"affected":"2 open source packages ship an affected version, including @lobehub/chat.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-23835 exists.","fix":"Upgrade @lobehub/chat to 1.143.3 or later.","what":"CVE-2026-23835 is a medium-severity path traversal vulnerability in lobehub lobe-chat, published on 30 Jan 2026. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-23835 and fix it if it is affected.\n\nWhat it is: CVE-2026-23835 is a medium-severity path traversal vulnerability in lobehub lobe-chat, published on 30 Jan 2026. Any signed-in user can exploit it over the network, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-23835 exists.\n\nAffected packages and fixed versions:\n- @lobehub/chat (npm): affected all versions; fixed in 1.143.3\n- @lobehub/chat (npm): affected all versions; fixed in 1.143.3\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-2026-23835/ (Markdown: https://insights.sbomify.com/CVE-2026-23835/index.md)","id":"CVE-2026-23835","markdown":"https://insights.sbomify.com/CVE-2026-23835/index.md","name":"CVE-2026-23835","record":{"aliases":["GHSA-wrrr-8jcv-wjf5"],"analysis":{"component_type":"web_application","fix_type":"upgrade","impacts":["data_modify","denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"LobeHub web application","requires_auth":"low_privilege","summary":"Attackers can manipulate upload parameters to write files to arbitrary paths and bypass storage quotas, causing financial loss and service degradation.","user_interaction":"not_required","vuln_class":"path_traversal"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[],"cvss":{"score":5.7,"severity":"medium","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N/E:P","version":"4.0"},"cwes":[{"id":"CWE-73","name":"External Control of File Name or Path"}],"description":"LobeHub is an open source human-and-AI-agent network. Prior to version 1.143.3, the file upload feature in `Knowledge Base \u003e File Upload` does not validate the integrity of the upload request, allowing users to intercept and modify the request parameters. As a result, it is possible to create arbitrary files in abnormal or unintended paths. In addition, since `lobechat.com` relies on the size parameter from the request to calculate file usage, an attacker can manipulate this value to misrepresent the actual file size, such as uploading a `1 GB` file while reporting it as `10 MB`, or falsely declaring a `10 MB` file as a `1 GB` file. By manipulating the size value provided in the client upload request, it is possible to bypass the monthly upload quota enforced by the server and continuously upload files beyond the intended storage and traffic limits. This abuse can result in a discrepancy between actual resource consumption and billing calculations, causing direct financial impact to the service operator. Additionally, exhaustion of storage or related resources may lead to degraded service availability, including failed uploads, delayed content delivery, or temporary suspension of upload functionality for legitimate users. A single malicious user can also negatively affect other users or projects sharing the same subscription plan, effectively causing an indirect denial of service (DoS). Furthermore, excessive and unaccounted-for uploads can distort monitoring metrics and overload downstream systems such as backup processes, malware scanning, and media processing pipelines, ultimately undermining overall operational stability and service reliability. Version 1.143.3 contains a patch for the issue.","ecosystems":["npm"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":true,"headline":"LobeHub Vulnerable to Improper Authorization in Presigned Upload","id":"CVE-2026-23835","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"npm","product":null,"products":[],"type":"path_traversal","year":"2026"},"n_packages":2,"n_references":1,"next":{"headline":"HotCRP vulnerable to remote code execution through formulas","id":"CVE-2026-23836"},"packages":[{"ecosystem":"npm","fixed":["1.143.3"],"introduced":["0"],"last_affected":[],"package":"@lobehub/chat","purl":null,"source":"GHSA-wrrr-8jcv-wjf5"},{"ecosystem":"npm","fixed":["1.143.3"],"introduced":["0"],"last_affected":[],"package":"@lobehub/chat","purl":"pkg:npm/%40lobehub/chat","source":"GHSA-wrrr-8jcv-wjf5"}],"prev":{"headline":"ESPHome vulnerable to denial-of-service via out-of-bounds check bypass in the API component","id":"CVE-2026-23833"},"products":["lobe-chat"],"published":"2026-01-30","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":"partial"},"state":"PUBLISHED","updated":"2026-01-30","vendors":["lobehub"]},"summary":"Attackers can manipulate upload parameters to write files to arbitrary paths and bypass storage quotas, causing financial loss and service degradation.","url":"https://insights.sbomify.com/CVE-2026-23835/"}