Secuno
ENNL
Book demo

CVE-2026-52842

Lightpanda vulnerability

9.3 CRITICALEPSS 0.25%
  1. Published15 Jul 2026

Description

Lightpanda is a headless browser designed for AI and automation. Prior to 0.3.1, Lightpanda searched for @ across the entire URL string instead of only the authority component when computing a page origin, so a URL such as `http://attacker.com/@victim.com/` was fetched from attacker.com but treated as `http://victim.com`, allowing a complete Same-Origin Policy bypass. This issue is fixed in version 0.3.1.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionRequired
ScopeChanged
ConfidentialityHigh
IntegrityHigh
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N

Remediation

No fixed version is recorded in the NVD data. Check the vendor advisory for the latest guidance.

References

Related CVEs

Recent high-severity vulnerabilities sharing a weakness type.

CVE-2026-773638.8
obsidian-tc is a governed, agent-ready Model Context Protocol server for Obsidian…
CVE-2026-1092868.1
Open WebUI from 0.7.0 before 0.11.4 contains a cross-origin message handling…
CVE-2026-91919.6
Progress MarkLogic Server 12.x releases before 12.1.0 and 11.x releases before 11.3.7…
CVE-2026-1082619.3
Tina is a headless content management system. Prior to tinacms 3.14.0 and @tinacms/app…
CVE-2026-1057838.0
Joplin is an open source note-taking and to-do application that organises notes and…
CVE-2026-1040569.8
Authlib version 1.7.2 and below contains a vulnerability where discovery JSON metadata…

Frequently asked

Is CVE-2026-52842 being actively exploited?

CVE-2026-52842 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.25%.

How severe is CVE-2026-52842?

CVE-2026-52842 has a CVSS 3.1 base score of 9.3, rated critical. EPSS estimates a 0.25% probability of exploitation.

How do I fix CVE-2026-52842?

Apply the vendor's patch or advisory guidance, then verify no affected versions remain across your devices.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-52842 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

See how prioritisation worksBook a demo

Get Patch this first every Monday

Five vulnerabilities that matter this week, ranked on real exploitation. Plain language, one email, no spam.

You can unsubscribe with one click from every issue. We handle your details as described in our privacy policy.

Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.