CVE-2026-8888 CVE-2026-8888
An on-path attacker can cause browser denial of service by injecting malicious regex patterns into the Securly Chrome Extension's configuration.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-8888?
CVE-2026-8888 is a high-severity denial of service vulnerability in Securly Chrome Extension, published on 3 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Which versions are affected by CVE-2026-8888?
It affects 1 product.
Products include Securly Securly.
How do I fix CVE-2026-8888?
No fix has been published for CVE-2026-8888 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-8888 being exploited?
There is no known exploitation of CVE-2026-8888 in the wild and no public exploit code.
Public exploit code: 1 proofs of concept on GitHub.
Other vulnerabilities in Securly Chrome Extension
Sources
Also known as GHSA-7w3m-2pw9-mg8x.