What is CVE-2026-8889?

CVE-2026-8889 is a high-severity vulnerability in Securly, classified under Inefficient Algorithmic Complexity. CVSS score: 7.5/10. Published 2026-06-03.

How severe is CVE-2026-8889?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Securly

CVE-2026-8889

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).

EPSS: 0.000 (2.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

Affected products

Securly — versions 3.0.7
Securly Chrome Extension — versions 0

Weakness classification (CWE)

CWE-407 — Inefficient Algorithmic Complexity

References

cret@cert.org (VDB Entry, Third Party Advisory)

Frequently asked questions

What is CVE-2026-8889?: CVE-2026-8889 is a high-severity vulnerability in Securly, classified under Inefficient Algorithmic Complexity. CVSS score: 7.5/10. Published 2026-06-03.
How severe is CVE-2026-8889?: High severity. CVSS v3 base score is 7.5 out of 10.