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CVE-2026-68763 Apache Tomcat

Affected softwareApache Tomcat
Severity7.5 High CVSS 3.1
WeaknessUncontrolled resource consumption (CWE-400)
Published25 Aug 2026
Updated27 Aug 2026

Published 2 months ago. NVD often adds the list of affected products days or weeks after a CVE is published, and the other sources we check lag too. The scope and status here may change.

Description

Uncontrolled Resource Consumption vulnerability in Apache Tomcat via an allocation leak in the HTTP/2 backlog tracking when a stream is reset This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.24, from 10.1.0-M1 through 10.1.57, from 9.0.39 through 9.0.120. The following versions were EOL at the time the CVE was created but are known to be affected: from 8.5.59 through 8.5.100. Other unsupported versions may also be affected. Users are recommended to upgrade to version 11.0.25, 10.1.58 or 9.0.121, which fix the issue.

Exploitation status

No public exploit

No exploit has been reported in the sources we check.

  • CISA KEV not listed
  • VulnCheck KEV not listed
  • CISA Vulnrichment exploitation: none
  • Indexed PoC none indexed
  • EPSS 0.74% chance in 30 days

Waratek protection

No exploit published

Within Waratek scope. In the sources we check, nobody has published exploit code for this CVE or reported it being exploited.

VRT has not found a public code change for this CVE yet.

  • Protection none
  • Action not pursued
  • Review automated Upstream data
  • Record active
Decided by Nothing to build a rule from yet: no published exploit, no CISA record of exploitation and no source-level change to read
Finding This CVE affects a known product, but nothing published names a fix and nothing published shows an exploit. That is a statement about the evidence, not about the defect — it does not mean the vulnerability is unimportant or unreachable, only that neither of the two things VRT can act on exists.

Affected software and releases

Oracle advisories

AdvisoryTypeQuarterProducts Oracle names in its risk matrix
Oracle Critical Patch Update October 2026 ↗ CPU 2026-Q4 Oracle Supply Chain / Folders & Files Attachment (Apache Tomcat) (9.3.6)

Oracle components and versions

FamilyComponentVersions, as Oracle lists themRead as
Oracle Supply Chain Folders & Files Attachment (Apache Tomcat) 9.3.6 9.3.6

Products and versions

1 product, 3 version entries
SourceVendorProductSchemeAffected versions
nvd apache tomcat generic ≥ 8.5.59 and < 9.0.121 · ≥ 10.1.0 and < 10.1.58 · ≥ 11.0.0 and < 11.0.25

References

URLTags
https://lists.apache.org/thread/tv51ty39ppv41v04hdtkp9dp7tg02nzl Vendor Advisory, Mailing List
http://www.openwall.com/lists/oss-security/2026/08/26/9 Third Party Advisory, Mailing List

Timeline

Published2026-08-25By the CVE Program.
NVD record modified2026-08-27NVD's own last-modified date for this record.