{"id":"CVE-2026-49839","summary":"jq --rawfile invalid-state reuse after String too long causes heap-buffer-overflow","details":"jq is a command-line JSON processor. Prior to 1.8.2,` jq --rawfile` can turn a handled oversized-string error into invalid-state reuse and a real heap out-of-bounds write in assertion-disabled builds. When jv_load_file(raw=1) reads an attacker-controlled file, it repeatedly appends file chunks to the same jv string accumulator. Once jv_string_append_buf() returns jv_invalid_with_msg(\"String too long\"), the raw-file loop does not stop. If the file contains at least one more byte, the next loop iteration appends a new chunk to an object that is already invalid. With assertions enabled this aborts in jvp_string_ptr(). With assertions disabled, the invalid object is interpreted as a string object and ASan reports heap-buffer-overflow. This vulnerability is fixed in 1.8.2.","aliases":["GHSA-cfh2-vwfq-qfmm"],"modified":"2026-07-08T08:13:40.439620343Z","published":"2026-06-25T17:17:46.181Z","related":["openSUSE-SU-2026:11133-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/49xxx/CVE-2026-49839.json","cna_assigner":"GitHub_M","cwe_ids":["CWE-787"]},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/49xxx/CVE-2026-49839.json"},{"type":"ADVISORY","url":"https://github.com/jqlang/jq/security/advisories/GHSA-cfh2-vwfq-qfmm"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-49839"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/jqlang/jq","events":[{"introduced":"0"},{"fixed":"34f7186b86743a083a589741b6cea95293524108"}],"database_specific":{"source":["AFFECTED_FIELD","CPE_RANGE"],"cpe":"cpe:2.3:a:jqlang:jq:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"0"},{"fixed":"1.8.2"}]}}],"versions":["jq-1.8.2rc1","jq-1.8.1","jq-1.8.0","jq-1.7.1","jq-1.7","jq-1.7rc2","jq-1.7rc1","jq-1.6","1.6rc2","jq-1.6rc1","jq-1.5rc2","jq-1.5rc1","jq-1.4","jq-1.3","jq-1.2","jq-1.1","jq-1.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-49839.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H"}]}