CVE-2026-8889

Status: ModifiedHigh (7.5)—

Version 3.0.7 of the Securly Chrome Extension uses deprecated SHA-1 hashing for IWF CSAM URL matching (25,020 hashes) and CIPA blocklist matching (12,352 hashes).

CVSS

Version: 3.1
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Base score: 7.5

Exploitation probability (EPSS)

Probability of exploitation in the next 30 days: 0.32%
Percentile among all scored CVEs: 23
Score date: 10/5/2026

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

🎯 ATT&CK techniques

How this vulnerability is exploited and what the attacker gains, in MITRE ATT&CK terms.

ExploitationT1190 Exploit Public-Facing Applicationinitial access85 %

Extensión Chrome expuesta en red con SHA-1 débil permite acceso no autenticado a 25k hashes CSAM y 12k URLs bloqueadas (CWE-407: información sensible).

Inferred by our analysis agent from the official description, CVSS vector and CWE, and checked by a supervisor. May contain errors.

🛡️ ATT&CK mitigations that cover these techniques

Vulnerability Scanning Privileged Account Management Network Segmentation Limit Access to Resource Over Network Filter Network Traffic Application Isolation and Sandboxing

Affected technologies (1)

Securly — Securly

CWEs

CWE-407

References

https://kb.cert.org/vuls/id/595768

Raw JSON (NVD)

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{
  "id": "CVE-2026-8889",
  "cveTags": [],
  "metrics": {
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          "options": [
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              "exploitation": "none"
            },
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              "automatable": "yes"
            },
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              "technicalImpact": "partial"
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          ],
          "version": "2.0.3",
          "timestamp": "2026-06-04T19:49:34.564362Z"
        }
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  "published": "2026-06-03T19:16:39.950",
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      "source": "cret@cert.org"
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      "value": "Version 3.0.7 of the Securly Chrome Extension uses deprecated SHA-1 hashing for IWF CSAM URL matching (25,020 hashes) and CIPA blocklist matching (12,352 hashes)."
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      "lang": "es",
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    }
  ],
  "lastModified": "2026-07-22T20:10:00.127",
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          "cpeMatch": [
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  "sourceIdentifier": "cret@cert.org"
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