CVE-2026-8874 (GCVE-0-2026-8874)

Vulnerability from cvelistv5 – Published: 2026-06-03 18:03 – Updated: 2026-06-04 14:43
VLAI?
Title
CVE-2026-8874
Summary
Version 3.0.7 of the Securly Chrome Extension downloads JSON files containing crisis alert keywords and filtering rules over unencrypted HTTP via the Fetch API. Other endpoints in the same extension correctly fetch IWF and CIPA data over HTTPS, demonstrating an inconsistent implementation of TLS.
Severity ?
7.1 (High)
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N
CWE
Assigner
References
Impacted products
Vendor Product Version
Securly Securly Chrome Extension Affected: 0 , < 3.0.7 (custom)
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    "adp": [
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        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "ADJACENT_NETWORK",
              "availabilityImpact": "NONE",
              "baseScore": 7.1,
              "baseSeverity": "HIGH",
              "confidentialityImpact": "LOW",
              "integrityImpact": "HIGH",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N",
              "version": "3.1"
            }
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              "content": {
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                "options": [
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                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-06-04T14:42:14.501953Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
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        "problemTypes": [
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                "description": "CWE-319 Cleartext Transmission of Sensitive Information",
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        ],
        "providerMetadata": {
          "dateUpdated": "2026-06-04T14:43:00.488Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "Securly Chrome Extension",
          "vendor": "Securly",
          "versions": [
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              "lessThan": "3.0.7",
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              "version": "0",
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      "descriptions": [
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          "value": "Version 3.0.7 of the Securly Chrome Extension downloads JSON files containing crisis alert keywords and filtering rules over unencrypted HTTP via the Fetch API. Other endpoints in the same extension correctly fetch IWF and CIPA data over HTTPS, demonstrating an inconsistent implementation of TLS."
        }
      ],
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      "providerMetadata": {
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        "orgId": "37e5125f-f79b-445b-8fad-9564f167944b",
        "shortName": "certcc"
      },
      "references": [
        {
          "url": "https://kb.cert.org/vuls/id/595768"
        }
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      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "CVE-2026-8874",
      "x_generator": {
        "engine": "VINCE 3.0.42",
        "env": "prod",
        "origin": "https://cveawg.mitre.org/api/cve/CVE-2026-8874"
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    "assignerShortName": "certcc",
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    "datePublished": "2026-06-03T18:03:04.592Z",
    "dateReserved": "2026-05-18T20:26:19.787Z",
    "dateUpdated": "2026-06-04T14:43:00.488Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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  • 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.