CVE-2026-25205

/* * PoC Concept for Heap-based Buffer Overflow in Escargot * This code demonstrates the concept of triggering a heap overflow. * Specific payload would depend on the internal structure of Escargot objects. */ #include <stdio.h> #include <string.h> #include <stdlib.h> void vulnerable_function(char *input) { // Simulating the vulnerability: lack of bounds checking char *heap_buffer = (char *)malloc(10 * sizeof(char)); printf("Buffer allocated at: %p\n", heap_buffer); // Vulnerable copy: Writing beyond the 10-byte buffer // In Escargot, this might be triggered by specific JS array operations strcpy(heap_buffer, input); printf("Data written: %s\n", heap_buffer); free(heap_buffer); } int main(int argc, char **argv) { if (argc > 1) { // Payload larger than buffer size (10 bytes) to cause overflow char *malicious_input = argv[1]; printf("Triggering overflow with payload: %s\n", malicious_input); vulnerable_function(malicious_input); } else { printf("Usage: %s <payload_string>\n", argv[0]); } return 0; }

{"cve": {"id": "CVE-2026-25205", "sourceIdentifier": "[email protected]", "published": "2026-04-13T05:16:02.407", "lastModified": "2026-04-28T21:09:30.303", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Heap-based buffer overflow vulnerability in Samsung Open Source Escargot allows out-of-bounds write.This issue affects Escargot:commit hash \n97e8115ab1110bc502b4b5e4a0c689a71520d335\n\n."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.4, "baseSeverity": "HIGH", "attackVector": "LOCAL", "attackComplexity": "HIGH", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 1.4, "impactScore": 5.9}, {"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 9.8, "baseSeverity": "CRITICAL", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 3.9, "impactScore": 5.9}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-122"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:samsung:escargot:2026-03-26:*:*:*:*:*:*:*", "matchCriteriaId": "E56434D9-B453-4690-8092-5F07D266E58D"}]}]}], "references": [{"url": "https://github.com/Samsung/escargot/pull/1554", "source": "[email protected]", "tags": ["Issue Tracking"]}]}}