Cyber Resilience

CVE-2026-8889

High

Published: 03 June 2026

Published
03 June 2026
Modified
10 June 2026
KEV Added
—
Patch
—
CVSS Score v3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
EPSS Score 0.0019 8.7th percentile
Risk Priority 15 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2026-8889 is a high-severity Inefficient Algorithmic Complexity (CWE-407) vulnerability in Securly Securly. Its CVSS base score is 7.5 (High).

Operationally, ranked at the 8.7th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

EU & UK References

Vulnerability details

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).

CWE(s)
CWE-407

Related Threats

No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.

Affected Assets

securly
securly
3.0.7

Mitigating Controls

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

SC-5 Denial-of-service Protection
addresses: CWE-407

Addresses inefficient algorithms whose complexity can be exploited for DoS.

References