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CVE Vulnerability Details :
CVE-2026-66913
PUBLISHED
More InfoOfficial Page
Assigner-CIRCL
Assigner Org ID-5a6e4751-2f3f-4070-9419-94fb35b644e8
View Known Exploited Vulnerability (KEV) details
Published At-28 Jul, 2026 | 12:19
Updated At-28 Jul, 2026 | 19:20
Rejected At-
▼CVE Numbering Authority (CNA)
Zip Bomb in Lookyloo Capture Upload Allows Denial of Service

Lookyloo did not enforce limits on the decompressed size of uploaded capture archives and compressed HAR files. An 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. The 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. The patch introduces: * A 1 GB cumulative uncompressed-size limit for imported capture archives. * Size-limited gzip and zlib decompression for compressed HAR files. * Explicit detection and handling of suspected zip bombs. * An HTTP 400 response when an oversized compressed HAR file is submitted through the API.

Affected Products
Vendor
lookyloo
Product
lookyloo
Repo
https://github.com/Lookyloo/lookyloo
Default Status
unaffected
Versions
Affected
  • From 0 through 1.40.0 (semver)
Problem Types
TypeCWE IDDescription
CWECWE-400CWE-400 Uncontrolled Resource Consumption
Type: CWE
CWE ID: CWE-400
Description: CWE-400 Uncontrolled Resource Consumption
Metrics
VersionBase scoreBase severityVector
4.06.9MEDIUM
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
Version: 4.0
Base score: 6.9
Base severity: MEDIUM
Vector:
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
Metrics Other Info
Impacts
CAPEC IDDescription
CAPEC-490CAPEC-490 Amplification
CAPEC ID: CAPEC-490
Description: CAPEC-490 Amplification
Solutions

Configurations

Workarounds

Exploits

Credits

remediation developer
Raphael Vinot
finder
https://github.com/EQSTLab
Timeline
EventDate
Replaced By

Rejected Reason

References
HyperlinkResource
https://github.com/Lookyloo/lookyloo/commit/96589da290f018e356db7c0eaddf1aa501630ca7
patch
Hyperlink: https://github.com/Lookyloo/lookyloo/commit/96589da290f018e356db7c0eaddf1aa501630ca7
Resource:
patch
▼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions

Configurations

Workarounds

Exploits

Credits

Timeline
EventDate
Replaced By

Rejected Reason

References
HyperlinkResource
Details not found