{"answers":{"affected":"5 open source packages ship an affected version, including github.com/tomwright/dasel/v3, github.com/tomwright/dasel and github.com/tomwright/dasel/v2.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-62866 exists.","fix":"Upgrade github.com/tomwright/dasel/v3 to 3.11.2 or later.","what":"CVE-2026-62866 is a medium-severity denial of service vulnerability in TomWright dasel, published on 21 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-62866 and fix it if it is affected.\n\nWhat it is: CVE-2026-62866 is a medium-severity denial of service vulnerability in TomWright dasel, published on 21 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-62866 exists.\n\nAffected packages and fixed versions:\n- github.com/tomwright/dasel/v3 (Go): affected from 3.0.0; fixed in 3.11.2\n- github.com/tomwright/dasel/v3 (Go): affected from 3.0.0; fixed in 3.11.2\n- github.com/tomwright/dasel/v3 (Go): affected from 3.0.0; fixed in 3.11.2\n- github.com/tomwright/dasel (Go): affected all versions; no fix listed\n- github.com/tomwright/dasel/v2 (Go): affected all versions; no fix listed\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-2026-62866/ (Markdown: https://insights.sbomify.com/CVE-2026-62866/index.md)","id":"CVE-2026-62866","markdown":"https://insights.sbomify.com/CVE-2026-62866/index.md","name":"CVE-2026-62866","record":{"aliases":["DEBIAN-CVE-2026-62866","GHSA-65gg-g7rw-6cpc","GO-2026-6548","UBUNTU-CVE-2026-62866"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Go data transformation library","requires_auth":"none","summary":"A remote attacker can cause a denial of service by providing a selector with trailing whitespace, triggering a panic in the Dasel library.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[],"cvss":{"score":6.2,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-129","name":"Improper Validation of Array Index"}],"description":"Dasel is a command-line tool and library for querying, modifying, and transforming data structures. From 3.0.0 until 3.11.2, selector/lexer/tokenize.go parseCurRune advances the input index across trailing whitespace and then reads the source at the exhausted index without an end-of-input check. A selector ending in whitespace, including input passed through lexer.NewTokenizer(...).Tokenize() or dasel.Query, can therefore cause an index-out-of-range panic and terminate the process. This issue is fixed in version 3.11.2.","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":"Dasel: Selector lexer panics on trailing whitespace in `parseCurRune`","id":"CVE-2026-62866","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Go","product":null,"products":[],"type":"denial_of_service","year":"2026"},"n_packages":5,"n_references":3,"next":{"headline":"Incus has an argument injection in storage volume block.create_options that leads to arbitrary command execution","id":"CVE-2026-62867"},"packages":[{"ecosystem":"Go","fixed":[],"introduced":["0"],"last_affected":[],"package":"github.com/tomwright/dasel","purl":"pkg:golang/github.com/tomwright/dasel","source":"GO-2026-6548"},{"ecosystem":"Go","fixed":[],"introduced":["0"],"last_affected":[],"package":"github.com/tomwright/dasel/v2","purl":"pkg:golang/github.com/tomwright/dasel/v2","source":"GO-2026-6548"},{"ecosystem":"Go","fixed":["3.11.2"],"introduced":["3.0.0"],"last_affected":[],"package":"github.com/tomwright/dasel/v3","purl":null,"source":"GHSA-65gg-g7rw-6cpc"},{"ecosystem":"Go","fixed":["3.11.2"],"introduced":["3.0.0"],"last_affected":[],"package":"github.com/tomwright/dasel/v3","purl":"pkg:golang/github.com/tomwright/dasel/v3","source":"GHSA-65gg-g7rw-6cpc"},{"ecosystem":"Go","fixed":["3.11.2"],"introduced":["3.0.0"],"last_affected":[],"package":"github.com/tomwright/dasel/v3","purl":"pkg:golang/github.com/tomwright/dasel/v3","source":"GO-2026-6548"}],"prev":{"headline":"TypeBot: Arbitrary server file read via Send Email block attachment path","id":"CVE-2026-62865"},"products":["dasel"],"published":"2026-09-21","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":"2026-09-21","vendors":["TomWright"]},"summary":"A remote attacker can cause a denial of service by providing a selector with trailing whitespace, triggering a panic in the Dasel library.","url":"https://insights.sbomify.com/CVE-2026-62866/"}