{"answers":{"affected":"3 open source packages ship an affected version, including github.com/grafana/tempo. It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-27878 in the wild and no public exploit code.","fix":"Upgrade github.com/grafana/tempo to 1.5.1-0.20260303204923-b13f74291d48 or later.","what":"CVE-2026-27878 is a medium-severity denial of service vulnerability in Grafana Enterprise Traces (GET), published on 19 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-2026-27878 and fix it if it is affected.\n\nWhat it is: CVE-2026-27878 is a medium-severity denial of service vulnerability in Grafana Enterprise Traces (GET), published on 19 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-27878 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- github.com/grafana/tempo (Go): affected all versions; fixed in 1.5.1-0.20260303204923-b13f74291d48\n- github.com/grafana/tempo (Go): affected all versions; fixed in 1.5.1-0.20260303204923-b13f74291d48\n- github.com/grafana/tempo (Go): affected all versions; fixed in 1.5.1-0.20260303204923-b13f74291d48\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-2026-27878/ (Markdown: https://insights.sbomify.com/CVE-2026-27878/index.md)","id":"CVE-2026-27878","markdown":"https://insights.sbomify.com/CVE-2026-27878/index.md","name":"CVE-2026-27878","record":{"aliases":["ECHO-f767-d344-5c3e","GHSA-6xff-cpcq-vpw2","GO-2026-6325","MINI-2w7p-cc6j-3prm","MINI-3pwp-mrjg-5cpj","MINI-5pp6-48x6-4xr9","MINI-64g3-6mm4-85m7","MINI-8cpc-m34m-2fm9","MINI-9q62-5j3m-xc4g","MINI-9rxx-7f55-v4rp","MINI-c7hh-g5wv-hfv5","MINI-c8q8-82r6-m65v","MINI-cjwf-2r4v-3prj","MINI-cmxg-g4xg-6cr7","MINI-f5fm-qfv4-rmhp","MINI-q6gh-6qv2-5c3m","MINI-v8f9-695f-23vg","MINI-vwhw-5gmj-6hgq","MINI-wcjx-3rm7-2hh8"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Grafana Tempo","requires_auth":"low_privilege","summary":"An authenticated user can cause an out-of-memory crash in Grafana Tempo by submitting a TraceQL query with a large exemplar hint.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GRAFANA","cpe":[{"product":"tempo","vendor":"grafana"}],"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-400","name":"Uncontrolled Resource Consumption"}],"description":"A TraceQL query in Grafana Tempo with a large exemplars hint value can cause the Tempo instance to allocate an excessive amount of memory, resulting in an out-of-memory crash. This could allow an authenticated user to trigger a denial of service against the Tempo service.","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":"Tempo TraceQL query with exemplar hint could result in unbounded memory usage","id":"CVE-2026-27878","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":"Query resampling can cause unbounded memory allocations","id":"CVE-2026-27879"},"packages":[{"ecosystem":"Go","fixed":["1.5.1-0.20260303204923-b13f74291d48"],"introduced":["0"],"last_affected":[],"package":"github.com/grafana/tempo","purl":null,"source":"GHSA-6xff-cpcq-vpw2"},{"ecosystem":"Go","fixed":["1.5.1-0.20260303204923-b13f74291d48"],"introduced":["0"],"last_affected":[],"package":"github.com/grafana/tempo","purl":"pkg:golang/github.com/grafana/tempo","source":"GHSA-6xff-cpcq-vpw2"},{"ecosystem":"Go","fixed":["1.5.1-0.20260303204923-b13f74291d48"],"introduced":["0"],"last_affected":[],"package":"github.com/grafana/tempo","purl":"pkg:golang/github.com/grafana/tempo","source":"GO-2026-6325"}],"prev":{"headline":"Public dashboards discloses all direct mode datasources","id":"CVE-2026-27877"},"products":["Enterprise Traces (GET)","Tempo"],"published":"2026-06-19","related":[{"cvss_score":7.5,"headline":"Tempo query limit results in unbounded memory allocation","id":"CVE-2026-21728","kev_date_added":null,"published":"2026-04-24"},{"cvss_score":7.5,"headline":"S3 SSE-C Encryption Key Exposed in Plaintext via Config Endpoint (CVE-2025-41118 Pattern)","id":"CVE-2026-28377","kev_date_added":null,"published":"2026-03-26"}],"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":"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":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-08-27","vendors":["Grafana"]},"summary":"An authenticated user can cause an out-of-memory crash in Grafana Tempo by submitting a TraceQL query with a large exemplar hint.","url":"https://insights.sbomify.com/CVE-2026-27878/"}