{"answers":{"affected":"3 open source packages ship an affected version, including github.com/nezhahq/nezha.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-53522 exists.","fix":"Upgrade github.com/nezhahq/nezha to 2.2.0 or later.","what":"CVE-2026-53522 is a medium-severity denial of service vulnerability in nezhahq nezha, published on 12 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-2026-53522 and fix it if it is affected.\n\nWhat it is: CVE-2026-53522 is a medium-severity denial of service vulnerability in nezhahq nezha, published on 12 Jun 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-2026-53522 exists.\n\nAffected packages and fixed versions:\n- github.com/nezhahq/nezha (Go): affected from 1.0.0; no fix listed\n- github.com/nezhahq/nezha (Go): affected from 1.0.0; fixed in 2.2.0\n- github.com/nezhahq/nezha (Go): affected from 1.0.0; fixed in 2.2.0\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-2026-53522/ (Markdown: https://insights.sbomify.com/CVE-2026-53522/index.md)","id":"CVE-2026-53522","markdown":"https://insights.sbomify.com/CVE-2026-53522/index.md","name":"CVE-2026-53522","record":{"aliases":["GHSA-jg62-j5h6-8mpq","GO-2026-5831"],"analysis":{"component_type":"web_application","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Nezha Monitoring","requires_auth":"low_privilege","summary":"Attackers can exhaust server resources by creating unlimited WebSocket streams via unbounded endpoints, causing denial of service.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[],"cvss":{"score":6.5,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-770","name":"Allocation of Resources Without Limits or Throttling"}],"description":"Nezha Monitoring is a self-hostable, lightweight, servers and websites monitoring and O\u0026M tool. From version 1.0.0 to before version 2.2.0, the Nezha dashboard exposes two endpoints that create long-lived WebSocket streams to monitored agents: POST /api/v1/terminal → createTerminal() (terminal.go:27-67) and POST /api/v1/file → createFM() (fm.go:28-67). Both call rpc.NezhaHandlerSingleton.CreateStream(streamId, ...) which inserts a new ioStreamContext into an unbounded map[string]*ioStreamContext (s.ioStreams in io_stream.go:59-67). There is no per-user rate limit, no global semaphore, and no per-server connection cap. This issue has been patched in version 2.2.0.","ecosystems":["Go"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":true,"headline":"Nezha Monitoring: Unbounded WebSocket Streams — Resource Exhaustion DoS","id":"CVE-2026-53522","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Go","product":null,"products":[],"type":"denial_of_service","year":"2026"},"n_packages":3,"n_references":1,"next":{"headline":"Nezha Monitoring: OAuth2 Redirect URL — Host Header Injection","id":"CVE-2026-53523"},"packages":[{"ecosystem":"Go","fixed":[],"introduced":["1.0.0"],"last_affected":[],"package":"github.com/nezhahq/nezha","purl":"pkg:golang/github.com/nezhahq/nezha","source":"GO-2026-5831"},{"ecosystem":"Go","fixed":["2.2.0"],"introduced":["1.0.0"],"last_affected":[],"package":"github.com/nezhahq/nezha","purl":null,"source":"GHSA-jg62-j5h6-8mpq"},{"ecosystem":"Go","fixed":["2.2.0"],"introduced":["1.0.0"],"last_affected":[],"package":"github.com/nezhahq/nezha","purl":"pkg:golang/github.com/nezhahq/nezha","source":"GHSA-jg62-j5h6-8mpq"}],"prev":{"headline":"Nezha Monitoring: Stored future DDNS profile ID allows unauthorized use of another user's DDNS profile context","id":"CVE-2026-53521"},"products":["nezha"],"published":"2026-06-12","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":"CC BY 4.0","name":"Go Vulnerability Database","prefix":"GO"},{"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":"2026-06-15","vendors":["nezhahq"]},"summary":"Attackers can exhaust server resources by creating unlimited WebSocket streams via unbounded endpoints, causing denial of service.","url":"https://insights.sbomify.com/CVE-2026-53522/"}