PT-2026-46053 · Google Chrome · Securly Chrome Extension

Santh · CVE-2026-8888 · Published 2026-06-03 · Updated 2026-06-05

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions Securly Chrome Extension version 3.0.7

Description The software downloads config.json over HTTP and compiles server-provided patterns as JavaScript regular expressions using the new RegExp() function without complexity validation. An on-path attacker can inject specific patterns to cause catastrophic backtracking, which is a state where a regular expression engine takes an exponential amount of time to determine if a string matches a pattern, resulting in a denial of service for all browsing.

Recommendations Update Securly Chrome Extension to a version newer than 3.0.7. As a temporary workaround, restrict the use of the new RegExp() function for processing server-provided patterns until a patch is applied.

Fix

DoS

Weakness Enumeration

CWE-1333

CWE-917

Related Identifiers

CVE-2026-8888

Affected Products

Securly Chrome Extension

References · 5

• https://nvd.nist.gov/vuln/detail/CVE-2026-8888 · Security Note
• https://twitter.com/CVEnew/status/2062404838584189075 · Twitter Post
• https://twitter.com/hieyz6838/status/2062696884293009457 · Twitter Post
• https://kb.cert.org/vuls/id/595768 · Note
• https://t.me/CVEtracker/55728 · Telegram Post