CVE-2023-52263: Brave Browser before 1.59.40 does not properly restrict the schema for WebUI factory and redirect

Q: How do I fix CVE-2023-52263?

browser: upgrade to 1.59.40. Exact commands for each OS are on this page.

Q: Is CVE-2023-52263 being exploited?

CVE-2023-52263 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2023-52263 affect?

CVE-2023-52263 affects browser. Severity is medium (CVSS 6.1). Brave Browser before 1.59.40 does not properly restrict the schema for WebUI factory and redirect. This is related to browser/brave_content_browser_client.cc and browser/ui/webui/brave_web_ui_controller_factory.cc.

Q: How urgent is CVE-2023-52263?

Priority 31/100. No elevated risk signals yet.

Routine

MEDIUM 6.1UPGRADE

CVE-2023-52263 is a medium-severity flaw (CVSS 6.1) affecting browser. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Brave Browser before 1.59.40 does not properly restrict the schema for WebUI factory and redirect. This is related to browser/brave_content_browser_client.cc and browser/ui/webui/brave_web_ui_controller_factory.cc.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	6.1 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.5% (top 61%)
CISA exploited list	No
Weakness	CWE-601
Published	2023-12-30
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: brave

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2023-12-30 19:15 UTCPublished CVE record published
2026-06-17 06:42 UTCUpdated Record last modified

brave browser UPGRADE

Affected: < 1.59.40

Fixed in: 1.59.40

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy browser || rpm -q browser || browser --version

2. UPGRADE to 1.59.40 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade browser

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade browser

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2023-52263?

browser: upgrade to 1.59.40. Exact commands for each OS are on this page.

Is CVE-2023-52263 being exploited?

CVE-2023-52263 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2023-52263 affect?

CVE-2023-52263 affects browser. Severity is medium (CVSS 6.1). Brave Browser before 1.59.40 does not properly restrict the schema for WebUI factory and redirect. This is related to browser/brave_content_browser_client.cc and browser/ui/webui/brave_web_ui_controller_factory.cc.

How urgent is CVE-2023-52263?

Priority 31/100. No elevated risk signals yet.

Related CVEs

CVE-2025-6152 MEDIUM 6.3 DOWNGRADE A vulnerability, which was classified as critical, was found in Steel Browser up to 0.1.3

References

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