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).

Published 2026-06-03 · last modified 2026-07-22.

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.

EPSS exploit prediction

EPSS: 0.003 (22.3th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 22nd percentile — 22.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.003 · change: +0.001

Affected products

Securly — versions 3.0.7
Securly Chrome Extension — versions 0

Weakness classification (CWE)

CWE-407 — Inefficient Algorithmic Complexity

References

kb.cert.org/vuls/id/595768 (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.