Skip to content
VulniPulse
Sign in
High 3 vendors · 3 advisories

CVE-2026-53404: DoS (Denial of Service) org.apache.tomcat.embed:tomcat-embed-core Dependency in Bitbucket Data Center

CVE-2026-53404 key facts

CISA KEV
Not listed (catalogue checked )
Highest advisory rating
High
CVSS base score
7.3 (Atlassian), 7.3 (NetApp), 6.5 (Red Hat)
CVSS vector
  • CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N (Red Hat)
Weakness
CWE-358
Fixed releases
  • Atlassian: Bitbucket Data Center and Server: 10.5.1 Data Center Only, Bitbucket Data Center and Server: 10.2.8 (LTS) recommended Data Center Only, Bitbucket Data Center and Server: 9.4.26 (LTS) Data Center Only
  • Red Hat: 11.0.23, 10.1.56, 9.0.119, tomcat9-1:9.0.120-1.el10_2, tomcat9-1:9.0.120-1.el10_0, tomcat-1:9.0.120-1.el8_10 and 28 more in the advisory
Vendor advisories
3 from Atlassian, NetApp, Red Hat
Listed by VulniPulse
Record changed

Ratings, versions and fixes are quoted from the vendor advisories that cover only CVE-2026-53404; each belongs to its advisory, not to every product listed. How records are collected and checked.

How do I fix CVE-2026-53404?

Upgrade to a fixed release named by the vendor:

  • Atlassian: Bitbucket Data Center and Server: 10.5.1 Data Center Only, Bitbucket Data Center and Server: 10.2.8 (LTS) recommended Data Center Only, Bitbucket Data Center and Server: 9.4.26 (LTS) Data Center Only
  • Red Hat: 11.0.23, 10.1.56, 9.0.119, tomcat9-1:9.0.120-1.el10_2, tomcat9-1:9.0.120-1.el10_0, tomcat-1:9.0.120-1.el8_10
  • Upgrade to a fixed version listed by Atlassian: Bitbucket Data Center and Server: 10.5.1 Data Center Only; Bitbucket Data Center and Server: 10.2.8 (LTS) recommended Data Center Only; Bitbucket Data Center and Server: 9.4.26 (LTS) Data Center Only. (Atlassian)
  • This vulnerability only affects Tomcat deployments that use the RewriteValve with OR-chained rewrite conditions. Deployments that do not use the RewriteValve are not affected. Review rewrite rules for OR-chained conditions and test rule evaluation behavior. (Red Hat)

Vendor advisories for CVE-2026-53404

Atlassian

1 advisory
  • Advisory severityHigh7.3

    High [CVE-2026-53404] DoS (Denial of Service) org.apache.tomcat.embed:tomcat-embed-core Dependency in Bitbucket Data Center

    CVE-2026-53404Source published

    DoS (Denial of Service) org.apache.tomcat.embed:tomcat-embed-core Dependency in Bitbucket Data Center. Affected: Bitbucket Data Center and Server. Listed in Atlassian's Security Bulletin of October 20 2026.

    Affected products in this advisory
    • Bitbucket Data Center and Server
    Source-reported affected versions
    • Bitbucket Data Center and Server: 10.5.0
    • Bitbucket Data Center and Server: 10.4.1 to 10.4.3
    • Bitbucket Data Center and Server: 10.3.0 to 10.3.2
    • Bitbucket Data Center and Server: 10.2.0 to 10.2.7 (LTS)

    6 more entries in the full advisory.

    Source-reported fixed versions
    • Bitbucket Data Center and Server: 10.5.1 Data Center Only
    • Bitbucket Data Center and Server: 10.2.8 (LTS) recommended Data Center Only
    • Bitbucket Data Center and Server: 9.4.26 (LTS) Data Center Only
    Mitigation guidance
    • Upgrade to a fixed version listed by Atlassian: Bitbucket Data Center and Server: 10.5.1 Data Center Only; Bitbucket Data Center and Server: 10.2.8 (LTS) recommended Data Center Only; Bitbucket Data Center and Server: 9.4.26 (LTS) Data Center Only.
    Full advisory and evidenceOpen source bulletin

NetApp

1 advisory
  • Advisory severityHigh7.3

    High [CVE-2026-53404] Apache Tomcat Vulnerability in NetApp Products

    NTAP-20260703-0017Source published Source updated

    Apache Tomcat versions 11.0.0-M1 through 11.0.22, 10.1.0-M1 through 10.1.55, 9.0.0-M1 through 9.0.118, and 8.5.0 through 8.5.100 are susceptible to a vulnerability which when successfully exploited could lead to disclosure of sensitive information, addition or modification of data, or Denial of Service (DoS). NetApp reports that one or more additional products remain under investigation; review the canonical advisory for current status. NetApp states there is no workaround available at this time.

    Affected products in this advisory
    No product details extracted. Check the source bulletin.
    Source-reported affected versions
    • 11.0.0
    • 11.0.22
    • 10.1.0
    • 10.1.55

    4 more entries in the full advisory.

    Source-reported fixed versions
    No fixed-version detail extracted. This does not mean no fix exists.
    Mitigation guidance
    No mitigation guidance extracted; consult the source.
    Full advisory and evidenceOpen source bulletin

Red Hat

1 advisory
  • Advisory severityMedium6.5

    Medium [CVE-2026-53404] Incorrect control flow in rewrite valve allows unexpected rule processing

    CVE-2026-53404Source published Source updated

    Always-Incorrect Control Flow Implementation vulnerability in Apache Tomcat's rewrite valve meant that if the first condition in an OR chain matched, subsequent non-OR conditions were skipped. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.22, from 10.1.0-M1 through 10.1.55, from 9.0.0.M1 through 9.0.118, from 8.5.0 through 8.5.100. Other versions that have reached end of support may also be affected. Users are recommended to upgrade to version 11.0.23, 10.1.56 or 9.0.119, which fix the issue. This can lead to unintended rule processing, potentially allowing for security bypasses or unauthorized access due to misapplied configurations. A flaw was found in Apache Tomcat's RewriteValve. When rewrite rules use OR-chained conditions followed by non-OR conditions, the…

    Affected products in this advisory
    • Red Hat Enterprise Linux 10.0 Extended Update Support
    • Red Hat Enterprise Linux 8.8 Telecommunications Update Service
    • Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions
    • Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions

    17 more entries in the full advisory.

    Source-reported affected versions
    • 11.0.0
    • 11.0.22
    • 10.1.0
    • 10.1.55

    4 more entries in the full advisory.

    Source-reported fixed versions
    • 11.0.23
    • 10.1.56
    • 9.0.119
    • tomcat9-1:9.0.120-1.el10_2

    30 more entries in the full advisory.

    Mitigation guidance
    • This vulnerability only affects Tomcat deployments that use the RewriteValve with OR-chained rewrite conditions. Deployments that do not use the RewriteValve are not affected. Review rewrite rules for OR-chained conditions and test rule evaluation behavior.
    Full advisory and evidenceOpen source bulletin

References

More Atlassian advisories

All Atlassian advisories

Get an email when Atlassian publishes the next one.

See Atlassian's last 90 days of advisories first. Then choose one product with live alerts free for life, or a free month of real-time alerts on everything with the severity, the fixed version and the vendor's link (card needed, then US$15/month; we email you before the first charge).

Alert me about Atlassian

iPhone and Android apps · New on the App Store

Get alerts for new CVEs on your phone.

Choose a whole vendor or a precise platform, then receive matching security advisories by phone notification, email, or both. Coverage follows 34 official vendor sources and 160+ reviewed platform categories.

Matching phone alertsOptional email delivery
Download on the App StoreGet CVE alerts on AndroidSee app features