{"answers":{"affected":"7 open source packages ship an affected version, including github.com/grafana/tempo. It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-21728 in the wild and no public exploit code.","fix":"Upgrade github.com/grafana/tempo to a fixed version for your release line: 2.8.4, 2.10.2 or 2.9.2.","what":"CVE-2026-21728 is a high-severity denial of service vulnerability in Grafana Enterprise Traces (GET), published on 24 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-21728 and fix it if it is affected.\n\nWhat it is: CVE-2026-21728 is a high-severity denial of service vulnerability in Grafana Enterprise Traces (GET), published on 24 Apr 2026. 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-2026-21728 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- github.com/grafana/tempo (Go): affected from 1.3.0; no fix listed\n- github.com/grafana/tempo (Go): affected from 1.3.0; fixed in 2.8.4\n- github.com/grafana/tempo (Go): affected from 1.3.0; fixed in 2.8.4\n- github.com/grafana/tempo (Go): affected from 2.10.0; fixed in 2.10.2\n- github.com/grafana/tempo (Go): affected from 2.10.0; fixed in 2.10.2\n- github.com/grafana/tempo (Go): affected from 2.9.0; fixed in 2.9.2\n- github.com/grafana/tempo (Go): affected from 2.9.0; fixed in 2.9.2\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-2026-21728/ (Markdown: https://insights.sbomify.com/CVE-2026-21728/index.md)","id":"CVE-2026-21728","markdown":"https://insights.sbomify.com/CVE-2026-21728/index.md","name":"CVE-2026-21728","record":{"aliases":["CLEANSTART-2026-DW50999","CLEANSTART-2026-IZ25531","CLEANSTART-2026-NL77468","CLEANSTART-2026-XP22570","ECHO-854a-eb69-2b5a","GHSA-p4r4-xvrq-gvmc","GO-2026-5528","MINI-27vv-29qw-7w5p","MINI-2ffq-pqq7-45cm","MINI-5qgm-jmph-7j6v","MINI-684r-fwh4-v977","MINI-6p7c-gvmv-4qw8","MINI-8jpj-8c3p-9p4x","MINI-93jq-29x4-hxw6","MINI-93pv-x94c-m252","MINI-c227-m969-wrch","MINI-f35m-wr67-cwpp","MINI-f4vx-c66r-89rg","MINI-hqwc-g687-88jx","MINI-hw3c-gjq9-gc6c","MINI-j34p-v3vw-v49h","MINI-vp4v-pxgg-f9rc","MINI-w5vp-7cxm-5qfj","MINI-wq8p-r9wc-26rc","MINI-x828-xq5p-q9f4"],"analysis":{"component_type":"server_software","fix_type":"configuration_change","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Grafana Tempo","requires_auth":"none","summary":"Attackers can cause denial of service in Grafana Tempo by sending queries with large limits, leading to unbounded memory allocation.","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":7.5,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/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"},{"id":"CWE-400","name":"Uncontrolled Resource Consumption"}],"description":"Tempo queries with large limits can cause large memory allocations which can impact the availability of the service, depending on its deployment strategy.\n\nMitigation can be done by setting max_result_limit in the search config, e.g. to 262144 (2^18). Alternatively, automatically restart the 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 query limit results in unbounded memory allocation","id":"CVE-2026-21728","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Go","product":null,"products":[],"type":"denial_of_service","year":"2026"},"n_packages":7,"n_references":1,"next":{"headline":"Loki detected_fields query limits results in unbounded memory allocation","id":"CVE-2026-21729"},"packages":[{"ecosystem":"Go","fixed":[],"introduced":["1.3.0"],"last_affected":[],"package":"github.com/grafana/tempo","purl":"pkg:golang/github.com/grafana/tempo","source":"GO-2026-5528"},{"ecosystem":"Go","fixed":["2.8.4"],"introduced":["1.3.0"],"last_affected":[],"package":"github.com/grafana/tempo","purl":null,"source":"GHSA-p4r4-xvrq-gvmc"},{"ecosystem":"Go","fixed":["2.8.4"],"introduced":["1.3.0"],"last_affected":[],"package":"github.com/grafana/tempo","purl":"pkg:golang/github.com/grafana/tempo","source":"GHSA-p4r4-xvrq-gvmc"},{"ecosystem":"Go","fixed":["2.10.2"],"introduced":["2.10.0"],"last_affected":[],"package":"github.com/grafana/tempo","purl":null,"source":"GHSA-p4r4-xvrq-gvmc"},{"ecosystem":"Go","fixed":["2.10.2"],"introduced":["2.10.0"],"last_affected":[],"package":"github.com/grafana/tempo","purl":"pkg:golang/github.com/grafana/tempo","source":"GHSA-p4r4-xvrq-gvmc"},{"ecosystem":"Go","fixed":["2.9.2"],"introduced":["2.9.0"],"last_affected":[],"package":"github.com/grafana/tempo","purl":null,"source":"GHSA-p4r4-xvrq-gvmc"},{"ecosystem":"Go","fixed":["2.9.2"],"introduced":["2.9.0"],"last_affected":[],"package":"github.com/grafana/tempo","purl":"pkg:golang/github.com/grafana/tempo","source":"GHSA-p4r4-xvrq-gvmc"}],"prev":{"headline":"Grafana Correlations: Cross-Tenant Data Disclosure and Permanent Deletion via Legacy org_id=0 Record","id":"CVE-2026-21727"},"products":["Enterprise Traces (GET)","Tempo"],"published":"2026-04-24","related":[{"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"},{"cvss_score":6.5,"headline":"Tempo TraceQL query with exemplar hint could result in unbounded memory usage","id":"CVE-2026-27878","kev_date_added":null,"published":"2026-06-19"}],"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":"yes","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-09-09","vendors":["Grafana"]},"summary":"Attackers can cause denial of service in Grafana Tempo by sending queries with large limits, leading to unbounded memory allocation.","url":"https://insights.sbomify.com/CVE-2026-21728/"}