ZDF
Sign inSign up

Vulnerabilities

Vulnerability · OSV-2025-1097

Security exception in org.htmlunit.cyberneko.HTMLTagBalancer.reopenFormattingElements

Published Oct 10, 2026 · catalog updated Oct 22, 2026 · Security exception in org.htmlunit.cyberneko.HTMLTagBalancer.reopenFormattingElements

Open the advisory

Exploitation likelihood is not on this record for OSV-2025-1097. A missing EPSS score is not a low risk. Compare Security exception in org.htmlunit.cyberneko.HTMLTagBalancer.reopenFormattingElements with the linked advisory before you change production.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (Security exception in org.htmlunit.cyberneko.HTMLTagBalancer.reopenFormattingElements).
  • No version range is stored. A customer cannot check an installed version against this record.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
  • EPSS is missing. A missing score is not a low risk.
Severity
Unknown—
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
Awaiting synchronization with FIRST
Remediation
Not established
Affected products
OSS-Fuzz htmlunit

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=571721880

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • OSS-Fuzz htmlunit0747862ca9e6 → 4610a7a39a9f (github.com/HtmlUnit/htmlunit)

How to fix OSV-2025-1097

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

Exploitation likelihood is not on this record for OSV-2025-1097. A missing EPSS score is not a low risk. Compare Security exception in org.htmlunit.cyberneko.HTMLTagBalancer.reopenFormattingElements with the linked advisory before you change production.

Which versions are affected?

Compare what you have installed with 0747862ca9e6 → 4610a7a39a9f (github.com/HtmlUnit/htmlunit). Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS is not on this record yet. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Oct 10, 2026 · OpenSSF OSV / OSV Scanner

    Detected

    OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=571721880

  2. Oct 22, 2026 · OpenSSF OSV / OSV Scanner

    Fix available

    htmlunit fixed in 4610a7a39a9f

  3. Oct 22, 2026 · OpenSSF OSV / OSV Scanner

    Fix available

    htmlunit fixed in 4610a7a39a9f (github.com/HtmlUnit/htmlunit)

  4. Oct 22, 2026 · OpenSSF OSV / OSV Scanner

    Updated

    OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=571721880

Sources

References

Freshness

Last verified in this catalog Oct 22, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.