OpenClaw versions prior to 2026.2.15 contain a denial of service vulnerability in the web_fetch tool that allows attackers to crash the Gateway process through memory exhaustion by parsing oversized or deeply nested HTML responses. Remote attackers can social-engineer users into fetching malicious URLs with pathological HTML structures to exhaust server memory and cause service unavailability.
{
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/28xxx/CVE-2026-28394.json",
"cwe_ids": [
"CWE-770"
],
"cna_assigner": "VulnCheck",
"unresolved_ranges": [
{
"extracted_events": [
{
"fixed": "2026.2.15"
}
],
"source": "AFFECTED_FIELD"
},
{
"extracted_events": [
{
"fixed": "2026.2.15"
}
],
"source": "CPE_FIELD"
}
]
}