CVE-2026-8888

Version 3.0.7 of the Securly Chrome Extension downloads config.json over HTTP and compiles server-provided patterns as JavaScript regular expressions via new RegExp() without complexity validation. An on-path attacker can inject specific patterns to cause catastrophic backtracking, resulting in denial of service on all browsing.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://kb.cert.org/vuls/id/595768	Third Party Advisory VDB Entry

Configurations

Configuration 1 (hide)

cpe:2.3:a:securly:securly:3.0.7:*:*:*:*:chrome:*:*

History

05 Jun 2026, 20:46

Type	Values Removed	Values Added
First Time		Securly securly Securly
CPE		cpe:2.3:a:securly:securly:3.0.7:::::chrome::
References	~~() https://kb.cert.org/vuls/id/595768 -~~	() https://kb.cert.org/vuls/id/595768 - Third Party Advisory, VDB Entry
CWE		CWE-917

04 Jun 2026, 20:16

Type	Values Removed	Values Added
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 7.5
CWE		CWE-1333

03 Jun 2026, 19:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-06-03 19:16

Updated : 2026-06-17 11:04

NVD link : CVE-2026-8888

Mitre link : CVE-2026-8888

CVE.ORG link : CVE-2026-8888

JSON object : View

Products Affected

securly

securly

CWE

CWE-917

Improper Neutralization of Special Elements used in an Expression Language Statement ('Expression Language Injection')

CWE-1333

Inefficient Regular Expression Complexity

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