CVE Explorer
CVE-2026-43894
jq is a command-line JSON processor. In 1.8.1 and earlier, when decNumberFromString is given a number literal of INT_MAX-1 (2147483646) digits, the D2U() macro overflows during signed-int arithmetic. The wrapped negative value bypasses the heap-allocation size check, causes the function to use a 30-byte stack buffer, and then writes ≈715 million 16-bit units (≈1.4 GiB) at an offset 1.43 GiB below the stack frame. The written content is fully attacker-controlled (the parsed decimal digits, packed
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0
Affected products and versions
1 source assertion{"product":"jq","vendor":"jqlang","versions":[{"status":"affected","version":"<= 1.8.1"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:590295bcd6828c20a149df49bda10cc097134397dac24609bac8f8b2e9b66cea · sha256:7a603c4b68caf29d… · /containers/cna/affected/0
Provider-owned CVSS observations
1 source assertion{"metric":{"attackComplexity":"LOW","attackVector":"LOCAL","availabilityImpact":"HIGH","baseScore":6.2,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
- cve_program_cvelist_v5cvssurn:baitaphish:normalized-source-record:v2:590295bcd6828c20a149df49bda10cc097134397dac24609bac8f8b2e9b66cea · sha256:7a603c4b68caf29d… · /containers/cna/metrics/0/cvssV3_1
CWE assertions
1 source assertion{"cweId":"CWE-190","description":"CWE-190: Integer Overflow or Wraparound","lang":"en","type":"CWE"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:590295bcd6828c20a149df49bda10cc097134397dac24609bac8f8b2e9b66cea · sha256:7a603c4b68caf29d… · /containers/cna/problemTypes/0/descriptions/0
Source references
2 source assertions{"tags":["exploit"],"url":"https://github.com/jqlang/jq/security/advisories/GHSA-5v7p-2r57-2g4g"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:590295bcd6828c20a149df49bda10cc097134397dac24609bac8f8b2e9b66cea · sha256:7a603c4b68caf29d… · /containers/adp/0/references/0
{"name":"https://github.com/jqlang/jq/security/advisories/GHSA-5v7p-2r57-2g4g","tags":["x_refsource_CONFIRM"],"url":"https://github.com/jqlang/jq/security/advisories/GHSA-5v7p-2r57-2g4g"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:590295bcd6828c20a149df49bda10cc097134397dac24609bac8f8b2e9b66cea · sha256:7a603c4b68caf29d… · /containers/cna/references/0
Attribution and limitations
- CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →
Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.