Vulnerability-Lookup

CVE-2026-85242 (GCVE-0-2026-85242)

Vulnerability from cvelistv5 – Published: 2026-09-03 16:17 – Updated: 2026-09-03 17:37

Title

Server-Side Request Forgery via Favicon Redirect to Local Network Resources in PlaywrightCapture

Summary

PlaywrightCapture contains a server-side request forgery (SSRF) vulnerability in its favicon retrieval functionality. When only_global_lookup is enabled, the application validates the initial favicon URL to prevent requests to localhost, loopback, or other non-public network addresses. However, redirects followed by aiohttp were not subjected to the same validation. An attacker able to influence the content of a page processed by PlaywrightCapture could specify a publicly reachable favicon URL that responds with an HTTP redirect to a local or otherwise restricted address, such as 127.0.0.1, localhost, or an internal network service. Because aiohttp automatically followed the redirect, the resulting request could bypass the application's local-address restrictions and cause the PlaywrightCapture host to issue HTTP requests to resources that should not be externally reachable. Depending on the services reachable from the PlaywrightCapture host and how retrieved favicon data is subsequently exposed or processed, this could be used to probe internal HTTP services or potentially obtain information from otherwise inaccessible endpoints. The patch introduces an aiohttp request middleware that applies the existing local-URL validation to every request in the redirect chain. Requests resolving to restricted/local destinations are rejected before they are issued.

Severity

6.9 (Medium)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-03 17:37 UTC

CWE

CWE-918 - Server-Side Request Forgery (SSRF)

Assigner

CIRCL ENISA root

References

1 reference

URL	Tags
https://github.com/Lookyloo/PlaywrightCapture/com…	patch

Impacted products

1 product

Vendor	Product	Version	CPE status
Lookyloo	PlaywrightCapture	Affected: 0 , < v1.41.2 (semver)	guessed

Credits

Raphael Vinot Grant - avrlab233

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-85242

Vulnerability from fkie_nvd - Published: 2026-09-03 17:17 - Updated: 2026-09-03 18:17

Severity

6.9 (Medium) - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

Summary

References

	URL	Tags
	5a6e4751-2f3f-4070-9419-94fb35b644e8	https://github.com/Lookyloo/PlaywrightCapture/commit/b912a04f7b190807b5e14e497048896bc5016fb9

Impacted products

	Vendor	Product	Version

JSON

To clipboard

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      "source": "5a6e4751-2f3f-4070-9419-94fb35b644e8",
      "url": "https://github.com/Lookyloo/PlaywrightCapture/commit/b912a04f7b190807b5e14e497048896bc5016fb9"
    }
  ],
  "sourceIdentifier": "5a6e4751-2f3f-4070-9419-94fb35b644e8",
  "vulnStatus": "Received",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-918"
        }
      ],
      "source": "5a6e4751-2f3f-4070-9419-94fb35b644e8",
      "type": "Secondary"
    }
  ]
}

GCVE-1-2026-20029 (CVE-2026-85242)

Vulnerability from gna-1 – Published: 2026-09-03 16:17 – Updated: 2026-09-03 16:17

Title

Server-Side Request Forgery via Favicon Redirect to Local Network Resources in PlaywrightCapture

Summary

Severity

6.9 (Medium)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

CWE

CWE-918 - Server-Side Request Forgery (SSRF)

Assigner

GNA-1

References

1 reference

URL	Tags
https://github.com/Lookyloo/PlaywrightCapture/com…	patch

Impacted products

1 product

Vendor	Product	Version
Lookyloo	PlaywrightCapture	Affected: 0 , < v1.41.2 (semver)

Credits

Raphael Vinot Grant - avrlab233

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "PlaywrightCapture",
          "repo": "https://github.com/Lookyloo/PlaywrightCapture",
          "vendor": "Lookyloo",
          "versions": [
            {
              "lessThan": "v1.41.2",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "remediation developer",
          "value": "Raphael Vinot"
        },
        {
          "lang": "en",
          "type": "finder",
          "value": "Grant - avrlab233"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "\u003cp\u003ePlaywrightCapture contains a server-side request forgery (SSRF) vulnerability in its favicon retrieval functionality. When \u003ccode\u003eonly_global_lookup\u003c/code\u003e is enabled, the application validates the initial favicon URL to prevent requests to localhost, loopback, or other non-public network addresses. However, redirects followed by \u003ccode\u003eaiohttp\u003c/code\u003e were not subjected to the same validation.\u003c/p\u003e\n\u003cp\u003eAn attacker able to influence the content of a page processed by PlaywrightCapture could specify a publicly reachable favicon URL that responds with an HTTP redirect to a local or otherwise restricted address, such as \u003ccode\u003e127.0.0.1\u003c/code\u003e, \u003ccode\u003elocalhost\u003c/code\u003e, or an internal network service. Because \u003ccode\u003eaiohttp\u003c/code\u003e automatically followed the redirect, the resulting request could bypass the application\u0027s local-address restrictions and cause the PlaywrightCapture host to issue HTTP requests to resources that should not be externally reachable.\u003c/p\u003e\n\u003cp\u003eDepending on the services reachable from the PlaywrightCapture host and how retrieved favicon data is subsequently exposed or processed, this could be used to probe internal HTTP services or potentially obtain information from otherwise inaccessible endpoints.\u003c/p\u003e\n\u003cp\u003eThe patch introduces an \u003ccode\u003eaiohttp\u003c/code\u003e request middleware that applies the existing local-URL validation to every request in the redirect chain. Requests resolving to restricted/local destinations are rejected before they are issued.\u003c/p\u003e\u003cbr\u003e"
            }
          ],
          "value": "PlaywrightCapture contains a server-side request forgery (SSRF) vulnerability in its favicon retrieval functionality. When only_global_lookup is enabled, the application validates the initial favicon URL to prevent requests to localhost, loopback, or other non-public network addresses. However, redirects followed by aiohttp were not subjected to the same validation.\n\n\nAn attacker able to influence the content of a page processed by PlaywrightCapture could specify a publicly reachable favicon URL that responds with an HTTP redirect to a local or otherwise restricted address, such as 127.0.0.1, localhost, or an internal network service. Because aiohttp automatically followed the redirect, the resulting request could bypass the application\u0027s local-address restrictions and cause the PlaywrightCapture host to issue HTTP requests to resources that should not be externally reachable.\n\n\nDepending on the services reachable from the PlaywrightCapture host and how retrieved favicon data is subsequently exposed or processed, this could be used to probe internal HTTP services or potentially obtain information from otherwise inaccessible endpoints.\n\n\nThe patch introduces an aiohttp request middleware that applies the existing local-URL validation to every request in the redirect chain. Requests resolving to restricted/local destinations are rejected before they are issued."
        }
      ],
      "impacts": [
        {
          "capecId": "CAPEC-664",
          "descriptions": [
            {
              "lang": "en",
              "value": "CAPEC-664 Server Side Request Forgery"
            }
          ]
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "Automatable": "NOT_DEFINED",
            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 6.9,
            "baseSeverity": "MEDIUM",
            "privilegesRequired": "NONE",
            "providerUrgency": "NOT_DEFINED",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "valueDensity": "NOT_DEFINED",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "NONE",
            "vulnConfidentialityImpact": "LOW",
            "vulnIntegrityImpact": "NONE",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-918",
              "description": "CWE-918 Server-Side Request Forgery (SSRF)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "orgId": "00000000-0000-4000-9000-000000000000"
      },
      "references": [
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/Lookyloo/PlaywrightCapture/commit/b912a04f7b190807b5e14e497048896bc5016fb9"
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "Server-Side Request Forgery via Favicon Redirect to Local Network Resources in PlaywrightCapture",
      "x_generator": {
        "engine": "Vulnogram 0.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "00000000-0000-4000-9000-000000000000",
    "cveId": "CVE-2026-85242",
    "datePublished": "2026-09-03T16:17:09.342653Z",
    "dateReserved": "2026-09-03T16:17:17.294Z",
    "dateUpdated": "2026-09-03T16:17:17.365576Z",
    "requesterUserId": "00000000-0000-4000-9000-000000000000",
    "serial": 1,
    "state": "PUBLISHED",
    "vulnId": "gcve-1-2026-20029"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

GHSA-47HH-M5VW-329P

Vulnerability from github – Published: 2026-09-03 18:31 – Updated: 2026-09-03 18:31

Details

An attacker able to influence the content of a page processed by PlaywrightCapture could specify a publicly reachable favicon URL that responds with an HTTP redirect to a local or otherwise restricted address, such as 127.0.0.1, localhost, or an internal network service. Because aiohttp automatically followed the redirect, the resulting request could bypass the application's local-address restrictions and cause the PlaywrightCapture host to issue HTTP requests to resources that should not be externally reachable.

Depending on the services reachable from the PlaywrightCapture host and how retrieved favicon data is subsequently exposed or processed, this could be used to probe internal HTTP services or potentially obtain information from otherwise inaccessible endpoints.

The patch introduces an aiohttp request middleware that applies the existing local-URL validation to every request in the redirect chain. Requests resolving to restricted/local destinations are rejected before they are issued.

Severity

6.9 (Medium)


                  
                    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-85242"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-918"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-03T17:17:30Z",
    "severity": "MODERATE"
  },
  "details": "PlaywrightCapture contains a server-side request forgery (SSRF) vulnerability in its favicon retrieval functionality. When only_global_lookup is enabled, the application validates the initial favicon URL to prevent requests to localhost, loopback, or other non-public network addresses. However, redirects followed by aiohttp were not subjected to the same validation.\n\n\nAn attacker able to influence the content of a page processed by PlaywrightCapture could specify a publicly reachable favicon URL that responds with an HTTP redirect to a local or otherwise restricted address, such as 127.0.0.1, localhost, or an internal network service. Because aiohttp automatically followed the redirect, the resulting request could bypass the application\u0027s local-address restrictions and cause the PlaywrightCapture host to issue HTTP requests to resources that should not be externally reachable.\n\n\nDepending on the services reachable from the PlaywrightCapture host and how retrieved favicon data is subsequently exposed or processed, this could be used to probe internal HTTP services or potentially obtain information from otherwise inaccessible endpoints.\n\n\nThe patch introduces an aiohttp request middleware that applies the existing local-URL validation to every request in the redirect chain. Requests resolving to restricted/local destinations are rejected before they are issued.",
  "id": "GHSA-47hh-m5vw-329p",
  "modified": "2026-09-03T18:31:50Z",
  "published": "2026-09-03T18:31:50Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-85242"
    },
    {
      "type": "WEB",
      "url": "https://github.com/Lookyloo/PlaywrightCapture/commit/b912a04f7b190807b5e14e497048896bc5016fb9"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.

Action not permitted

CVE-2026-85242 (GCVE-0-2026-85242)

FKIE_CVE-2026-85242

GCVE-1-2026-20029 (CVE-2026-85242)

GHSA-47HH-M5VW-329P

Tags

Sightings

Nomenclature