{"answers":{"affected":"2 open source packages ship an affected version, including github.com/grafana/loki. It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-36156 in the wild and no public exploit code.","fix":"Upgrade github.com/grafana/loki to 2.3.0 or later.","what":"CVE-2021-36156 is a medium-severity path traversal vulnerability in n/a, published on 3 Aug 2021. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2021-36156 and fix it if it is affected.\n\nWhat it is: CVE-2021-36156 is a medium-severity path traversal vulnerability in n/a, published on 3 Aug 2021. 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-2021-36156 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- github.com/grafana/loki (Go): affected all versions; fixed in 2.3.0\n- github.com/grafana/loki (Go): affected all versions; fixed in 2.3.0\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-2021-36156/ (Markdown: https://insights.sbomify.com/CVE-2021-36156/index.md)","id":"CVE-2021-36156","markdown":"https://insights.sbomify.com/CVE-2021-36156/index.md","name":"CVE-2021-36156","record":{"aliases":["GHSA-grj5-8x6q-hc9q"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["data_read"],"network_reachable":"yes","non_default_config":false,"product_category":"Grafana Loki","requires_auth":"none","summary":"Attackers can read sensitive files via directory traversal in Grafana Loki by manipulating the X-Scope-OrgID header, leading to information disclosure.","user_interaction":"not_required","vuln_class":"path_traversal"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"mitre","cpe":[{"product":"loki","vendor":"grafana"}],"cvss":{"score":5.3,"severity":"medium","source":"nvd","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","version":"3.1"},"cwes":[{"id":"CWE-22","name":"Improper Limitation of a Pathname to a Restricted Directory"}],"description":"An issue was discovered in Grafana Loki through 2.2.1. The header value X-Scope-OrgID is used to construct file paths for rules files, and if crafted to conduct directory traversal such as ae ../../sensitive/path/in/deployment pathname, then Loki will attempt to parse a rules file at that location and include some of the contents in the error message.","ecosystems":["Go"],"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":"Path traversal in Grafana Loki","id":"CVE-2021-36156","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Go","product":null,"products":[],"type":"path_traversal","year":"2021"},"n_packages":2,"n_references":2,"next":{"headline":"Path traversal in Grafana Cortex","id":"CVE-2021-36157"},"packages":[{"ecosystem":"Go","fixed":["2.3.0"],"introduced":["0"],"last_affected":[],"package":"github.com/grafana/loki","purl":null,"source":"GHSA-grj5-8x6q-hc9q"},{"ecosystem":"Go","fixed":["2.3.0"],"introduced":["0"],"last_affected":[],"package":"github.com/grafana/loki","purl":"pkg:golang/github.com/grafana/loki","source":"GHSA-grj5-8x6q-hc9q"}],"prev":{"headline":"Uncontrolled Resource Consumption in LengthPrefixedMessageReader","id":"CVE-2021-36155"},"products":["n/a"],"published":"2021-08-03","related":[{"cvss_score":5.3,"headline":"Loki Path Traversal - CVE-2021-36156 Bypass","id":"CVE-2026-21726","kev_date_added":null,"published":"2026-04-15"}],"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":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2024-08-04","vendors":["n/a"]},"summary":"Attackers can read sensitive files via directory traversal in Grafana Loki by manipulating the X-Scope-OrgID header, leading to information disclosure.","url":"https://insights.sbomify.com/CVE-2021-36156/"}