{"id":"CVE-2026-66913","summary":"Zip Bomb in Lookyloo Capture Upload Allows Denial of Service","details":"Lookyloo did not enforce limits on the decompressed size of uploaded capture archives and compressed HAR files.\n\nAn attacker could submit a specially crafted ZIP, gzip, or zlib-compressed capture containing data that expands to a very large size during processing. Because the application decompressed this content directly in memory without first limiting the output size, processing the malicious capture could exhaust available memory, terminate a web or worker process, or make the Lookyloo instance unavailable.\n\nThe vulnerability affects both full Lookyloo capture archive imports and API submissions containing gzip-compressed HAR data. Repeated exploitation could cause a persistent denial-of-service condition until the affected processes or instance are restarted.\n\nThe patch introduces:\n\n  *  A 1 GB cumulative uncompressed-size limit for imported capture archives.\n  *  Size-limited gzip and zlib decompression for compressed HAR files.\n  *  Explicit detection and handling of suspected zip bombs.\n  *  An HTTP 400 response when an oversized compressed HAR file is submitted through the API.","modified":"2026-08-01T03:33:08.546006245Z","published":"2026-07-28T12:19:20.977Z","database_specific":{"cwe_ids":["CWE-400"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/66xxx/CVE-2026-66913.json","cna_assigner":"CIRCL"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/66xxx/CVE-2026-66913.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-66913"},{"type":"FIX","url":"https://github.com/Lookyloo/lookyloo/commit/96589da290f018e356db7c0eaddf1aa501630ca7"},{"type":"PACKAGE","url":"https://github.com/Lookyloo/lookyloo"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/lookyloo/lookyloo","events":[{"introduced":"0"},{"fixed":"96589da290f018e356db7c0eaddf1aa501630ca7"}],"database_specific":{"source":["AFFECTED_FIELD","REFERENCES"],"extracted_events":[{"introduced":"0"},{"last_affected":"1.40.0"}]}}],"versions":["v1.40.0","v1.39.4","v1.39.3","v1.39.0","v1.38.1","v1.38.0","v1.37.0","v1.36.1","v1.36.0","v1.35.3","v1.35.2","v1.35.1","v1.35.0","v1.34.0","v1.33.0","v1.32.0","v1.31.0","v1.30.0","v1.29.0","v1.28.1","v1.28.0","v1.27.0","v1.26.1","v1.26.0","v1.25.0","v1.24.0","v1.23.0","v1.22.0","v1.21.0","v1.20.0","v1.19.0","v1.18.0","v1.17.0","v1.16.0","v1.15.0","v1.14.0","v1.13.0","v1.12.0","v1.11.0","v1.10.0","v1.10","v1.9.2","v1.9.1","v1.9.0","v1.8.0","v1.7.0","v1.6.0","v1.5.0","v1.4.0","v1.3","v1.2","v1.1","v0.6","v1.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-66913.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"}]}