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CVE-2026-48202VulnerabilityPublished

Brave Brave · Improper Neutralization of Script-Related HTML Tags

Source GCVE Database

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Authoritative record:CVE-2026-48202· Medium 5.3

Not known to be exploited · CVSS 5.3 Medium : upgrade to 0.8.9 when convenient.

Data as of 29 Oct 2026, 16:38 UTC

CVSS 3.1 base score
5.3Medium
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CNA (Patchstack)CVSS 3.15.3
Patch
Available – fixed in 0.8.9
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 29 Oct 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 29 Oct 2026.

What to do

Upgrade Brave to 0.8.9.

Affected software

ProductAffectedFixed in
Bravebrave-popup-builderAffected
  • <0.8.9
Fixed in
  • 0.8.9

AI-suggested

If you cannot patch yet, users should exercise caution when interacting with untrusted content in Brave versions up to 0.8.8.

Description

A Cross-Site Scripting (XSS) vulnerability exists in the Brave browser's brave-popup-builder component due to improper neutralization of script-related HTML tags. This vulnerability allows code injection. It affects Brave versions up to 0.8.8. The vulnerability has a medium severity with a CVSS score of 5.3. No known exploits in the wild or patches are currently documented.

References

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