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» 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.
NVD Status： Analyzed ，CVE State: published
Threat Intelligence & Risk Assessment for CVE-2026-8888
Conclusion & alert: CVE-2026-8888 is rated Low Risk (38.8/100) : CVSS High severity, with low exploitation likelihood (EPSS 0.33%).Mandatory action: Monitor for updates and reassess as exploit intelligence or EPSS changes.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
Exploit prediction scoring system (EPSS) score for CVE-2026-8888
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
#
Date
Old EPSS score
New EPSS score
Delta (New - Old)
1
2026-06-15
0.05%
0.33%
+0.27%
2
2026-06-09
0.02%
0.05%
+0.04%
3
2026-06-04
—
0.02%
—
Full EPSS history
(3 records total)
Common vulnerability scoring system (CVSS) metrics for CVE-2026-8888
CVSS metrics for this CVE.
Base score
Version
Severity
Vector
Exploitability
Impact
Score source
7.5
3.1
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
3.9
3.6
[email protected]
7.5
3.1
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
3.9
3.6
134c704f-9b21-4f2e-91b3-4a467353bcc0
Weakness enumeration for CVE-2026-8888
GitHub Security Advisory for CVE-2026-8888
GHSA-7w3m-2pw9-mg8x · Severity: high
— Version 3.0.7 of the Securly Chrome Extension downloads config.json over HTTP and compiles server...
Affected software / configurations for CVE-2026-8888
Vendor
Product
Version
Raw CPE
securly
securly
3.0.7
cpe:2.3:a:securly:securly:3.0.7:*:*:*:*:chrome:*:*
References for CVE-2026-8888
cvelogic
Threat Intelligence