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15 vulnerabilities found for lookyloo by lookyloo
CVE-2026-66913 (GCVE-0-2026-66913)
Vulnerability from nvd – Published: 2026-07-28 12:19 – Updated: 2026-07-28 19:20
VLAI
EPSS
VEX
Title
Zip Bomb in Lookyloo Capture Upload Allows Denial of Service
Summary
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.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-28 19:20 UTC
CWE
- CWE-400 - Uncontrolled Resource Consumption
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/Lookyloo/lookyloo/commit/96589… | patch |
Impacted products
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CVE-2026-66824 (GCVE-0-2026-66824)
Vulnerability from nvd – Published: 2026-07-27 19:58 – Updated: 2026-07-28 15:20
VLAI
EPSS
VEX
Title
Stored Cross-Site Scripting via Unsafe Capture Tree JSON Embedding
Summary
A stored cross-site scripting vulnerability existed in the capture tree visualization page. The application embedded the serialized capture tree directly into an inline JavaScript block using the Jinja safe filter.
Because the tree data can contain values derived from captured and potentially attacker-controlled web content, a specially crafted value could prematurely terminate the surrounding <script> element and inject arbitrary HTML or JavaScript. The malicious code would execute in the browser of a user viewing the affected capture tree.
Successful exploitation could allow an attacker to perform actions using the victim’s authenticated session, access information available to the victim, or modify application data within the permissions of the affected user.
The patch removes the JSON data from the HTML document and retrieves it through a dedicated API endpoint. The client then processes the response using response.json(), preventing capture data from being interpreted as executable content within the original page’s HTML or JavaScript context.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-28 15:08 UTC
CWE
- CWE-79 - Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting')
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/Lookyloo/lookyloo/commit/39518… | patch |
Impacted products
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CVE-2025-66460 (GCVE-0-2025-66460)
Vulnerability from nvd – Published: 2025-12-02 18:34 – Updated: 2025-12-02 19:14
VLAI
EPSS
VEX
Title
Lookyloo vulnerable to XSS due to lack of escaping in HTML elements passed to Datatables
Summary
Lookyloo is a web interface that allows users to capture a website page and then display a tree of domains that call each other. Prior to 1.35.3, Lookyloo passed improperly escaped values to cells rendered in datatables using the orthogonal-data feature. It is definitely exploitable from the popup view, but it is most probably also exploitable in many other places. This vulnerability is fixed in 1.35.3.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-12-02 19:14 UTC
CWE
- CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/Lookyloo/lookyloo/security/adv… | x_refsource_CONFIRM |
| https://github.com/Lookyloo/lookyloo/commit/63b39… | x_refsource_MISC |
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CVE-2025-66459 (GCVE-0-2025-66459)
Vulnerability from nvd – Published: 2025-12-02 18:32 – Updated: 2025-12-02 19:28
VLAI
EPSS
VEX
Title
Lookyloo vulnerable to XSS due to unescaped error message passed to innerHTML
Summary
Lookyloo is a web interface that allows users to capture a website page and then display a tree of domains that call each other. Prior to 1.35.3, a XSS vulnerability can be triggered when a user submits a list of URLs to capture, one of them contains a HTML element, and the capture fails. Then, the error field is populated with an error message that contains the bad URL they tried to capture, triggering the XSS. This vulnerability is fixed in 1.35.3.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-12-02 19:26 UTC
CWE
- CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/Lookyloo/lookyloo/security/adv… | x_refsource_CONFIRM |
| https://github.com/Lookyloo/lookyloo/commit/1850a… | x_refsource_MISC |
| https://github.com/Lookyloo/lookyloo/commit/8c3ab… | x_refsource_MISC |
| https://github.com/Lookyloo/lookyloo/commit/95cdc… | x_refsource_MISC |
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CVE-2025-66458 (GCVE-0-2025-66458)
Vulnerability from nvd – Published: 2025-12-02 18:30 – Updated: 2025-12-02 19:26
VLAI
EPSS
VEX
Title
Lookyloo has multiple XSS due to unsafe use of f-strings in Markup
Summary
Lookyloo is a web interface that allows users to capture a website page and then display a tree of domains that call each other. Prior to 1.35.3, there are multiple XSS due to unsafe use of f-strings in Markup. The issue requires a malicious 3rd party server responding with a JSON document containing JS code in a script element. This vulnerability is fixed in 1.35.3.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-12-02 19:26 UTC
CWE
- CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/Lookyloo/lookyloo/security/adv… | x_refsource_CONFIRM |
| https://github.com/Lookyloo/lookyloo/commit/b6ee2… | x_refsource_MISC |
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CVE-2025-65095 (GCVE-0-2025-65095)
Vulnerability from nvd – Published: 2025-11-19 17:38 – Updated: 2025-11-20 14:21
VLAI
EPSS
VEX
Title
Lookyloo is vulnerable due to improper user input sanitization
Summary
Lookyloo is a web interface that allows users to capture a website page and then display a tree of domains that call each other. Prior to version 1.35.1, there is potential cross-site scripting on index and tree page. This issue has been patched in version 1.35.1.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-11-20 14:21 UTC
CWE
- CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/Lookyloo/lookyloo/security/adv… | x_refsource_CONFIRM |
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| https://github.com/Lookyloo/lookyloo/blob/main/we… | x_refsource_MISC |
| https://vulnerability.circl.lu/vuln/gcve-1-2025-0018 | x_refsource_MISC |
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CVE-2026-66913 (GCVE-0-2026-66913)
Vulnerability from cvelistv5 – Published: 2026-07-28 12:19 – Updated: 2026-07-28 19:20
VLAI
EPSS
VEX
Title
Zip Bomb in Lookyloo Capture Upload Allows Denial of Service
Summary
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.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-28 19:20 UTC
CWE
- CWE-400 - Uncontrolled Resource Consumption
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/Lookyloo/lookyloo/commit/96589… | patch |
Impacted products
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CVE-2026-66824 (GCVE-0-2026-66824)
Vulnerability from cvelistv5 – Published: 2026-07-27 19:58 – Updated: 2026-07-28 15:20
VLAI
EPSS
VEX
Title
Stored Cross-Site Scripting via Unsafe Capture Tree JSON Embedding
Summary
A stored cross-site scripting vulnerability existed in the capture tree visualization page. The application embedded the serialized capture tree directly into an inline JavaScript block using the Jinja safe filter.
Because the tree data can contain values derived from captured and potentially attacker-controlled web content, a specially crafted value could prematurely terminate the surrounding <script> element and inject arbitrary HTML or JavaScript. The malicious code would execute in the browser of a user viewing the affected capture tree.
Successful exploitation could allow an attacker to perform actions using the victim’s authenticated session, access information available to the victim, or modify application data within the permissions of the affected user.
The patch removes the JSON data from the HTML document and retrieves it through a dedicated API endpoint. The client then processes the response using response.json(), preventing capture data from being interpreted as executable content within the original page’s HTML or JavaScript context.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-28 15:08 UTC
CWE
- CWE-79 - Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting')
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/Lookyloo/lookyloo/commit/39518… | patch |
Impacted products
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CVE-2025-66460 (GCVE-0-2025-66460)
Vulnerability from cvelistv5 – Published: 2025-12-02 18:34 – Updated: 2025-12-02 19:14
VLAI
EPSS
VEX
Title
Lookyloo vulnerable to XSS due to lack of escaping in HTML elements passed to Datatables
Summary
Lookyloo is a web interface that allows users to capture a website page and then display a tree of domains that call each other. Prior to 1.35.3, Lookyloo passed improperly escaped values to cells rendered in datatables using the orthogonal-data feature. It is definitely exploitable from the popup view, but it is most probably also exploitable in many other places. This vulnerability is fixed in 1.35.3.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-12-02 19:14 UTC
CWE
- CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/Lookyloo/lookyloo/security/adv… | x_refsource_CONFIRM |
| https://github.com/Lookyloo/lookyloo/commit/63b39… | x_refsource_MISC |
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CVE-2025-66459 (GCVE-0-2025-66459)
Vulnerability from cvelistv5 – Published: 2025-12-02 18:32 – Updated: 2025-12-02 19:28
VLAI
EPSS
VEX
Title
Lookyloo vulnerable to XSS due to unescaped error message passed to innerHTML
Summary
Lookyloo is a web interface that allows users to capture a website page and then display a tree of domains that call each other. Prior to 1.35.3, a XSS vulnerability can be triggered when a user submits a list of URLs to capture, one of them contains a HTML element, and the capture fails. Then, the error field is populated with an error message that contains the bad URL they tried to capture, triggering the XSS. This vulnerability is fixed in 1.35.3.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-12-02 19:26 UTC
CWE
- CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/Lookyloo/lookyloo/security/adv… | x_refsource_CONFIRM |
| https://github.com/Lookyloo/lookyloo/commit/1850a… | x_refsource_MISC |
| https://github.com/Lookyloo/lookyloo/commit/8c3ab… | x_refsource_MISC |
| https://github.com/Lookyloo/lookyloo/commit/95cdc… | x_refsource_MISC |
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CVE-2025-66458 (GCVE-0-2025-66458)
Vulnerability from cvelistv5 – Published: 2025-12-02 18:30 – Updated: 2025-12-02 19:26
VLAI
EPSS
VEX
Title
Lookyloo has multiple XSS due to unsafe use of f-strings in Markup
Summary
Lookyloo is a web interface that allows users to capture a website page and then display a tree of domains that call each other. Prior to 1.35.3, there are multiple XSS due to unsafe use of f-strings in Markup. The issue requires a malicious 3rd party server responding with a JSON document containing JS code in a script element. This vulnerability is fixed in 1.35.3.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-12-02 19:26 UTC
CWE
- CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/Lookyloo/lookyloo/security/adv… | x_refsource_CONFIRM |
| https://github.com/Lookyloo/lookyloo/commit/b6ee2… | x_refsource_MISC |
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CVE-2025-65095 (GCVE-0-2025-65095)
Vulnerability from cvelistv5 – Published: 2025-11-19 17:38 – Updated: 2025-11-20 14:21
VLAI
EPSS
VEX
Title
Lookyloo is vulnerable due to improper user input sanitization
Summary
Lookyloo is a web interface that allows users to capture a website page and then display a tree of domains that call each other. Prior to version 1.35.1, there is potential cross-site scripting on index and tree page. This issue has been patched in version 1.35.1.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-11-20 14:21 UTC
CWE
- CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/Lookyloo/lookyloo/security/adv… | x_refsource_CONFIRM |
| https://github.com/Lookyloo/lookyloo/commit/ac2f7… | x_refsource_MISC |
| https://github.com/Lookyloo/lookyloo/blob/main/we… | x_refsource_MISC |
| https://vulnerability.circl.lu/vuln/gcve-1-2025-0018 | x_refsource_MISC |
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GCVE-1-2026-20075 (CVE-2026-66913)
Vulnerability from gna-1 – Published: 2026-07-28 12:18 – Updated: 2026-07-28 12:19
VLAI
EPSS
VEX
Title
Zip Bomb in Lookyloo Capture Upload Allows Denial of Service
Summary
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.
Severity
CWE
- CWE-400 - Uncontrolled Resource Consumption
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/Lookyloo/lookyloo/commit/96589… | patch |
Impacted products
Relationships
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GCVE-1-2026-20140 (CVE-2026-66824)
Vulnerability from gna-1 – Published: 2026-07-27 19:56 – Updated: 2026-07-27 19:58
VLAI
EPSS
VEX
Title
Stored Cross-Site Scripting via Unsafe Capture Tree JSON Embedding
Summary
A stored cross-site scripting vulnerability existed in the capture tree visualization page. The application embedded the serialized capture tree directly into an inline JavaScript block using the Jinja safe filter.
Because the tree data can contain values derived from captured and potentially attacker-controlled web content, a specially crafted value could prematurely terminate the surrounding <script> element and inject arbitrary HTML or JavaScript. The malicious code would execute in the browser of a user viewing the affected capture tree.
Successful exploitation could allow an attacker to perform actions using the victim’s authenticated session, access information available to the victim, or modify application data within the permissions of the affected user.
The patch removes the JSON data from the HTML document and retrieves it through a dedicated API endpoint. The client then processes the response using response.json(), preventing capture data from being interpreted as executable content within the original page’s HTML or JavaScript context.
Severity
CWE
- CWE-79 - Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting')
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/Lookyloo/lookyloo/commit/39518… | patch |
Impacted products
Relationships
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GCVE-1-2025-0018 (CVE-2025-65095)
Vulnerability from gna-1 – Published: 2025-11-18 15:33 – Updated: 2025-11-18 20:39
VLAI
EPSS
VEX
Title
HTML injection issue was identified in Lookyloo’s web interface helper function
Summary
A HTML injection issue was identified in Lookyloo’s web interface helper function shorten_string (website/web/__init__.py). The function was used to truncate and render user-controlled values inside HTML (for example in a <span title="..."> attribute) without first escaping the string. This allowed crafted input containing HTML to be injected into the rendered page.
On a standard Lookyloo installation, the configured Content Security Policy (CSP) significantly limited the impact and prevented direct script execution in most scenarios, but the underlying HTML injection bug was still present and could become exploitable if CSP was relaxed or modified.
Severity
CWE
- CWE-74 - Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/Lookyloo/lookyloo/commit/ac2f7… | patch |
| https://github.com/Lookyloo/lookyloo/security/adv… | vendor-advisory |
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