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Highest advisory severityHigh 3 vendors · 3 advisories

CVE-2026-77791

CVE-2026-77791: 3 tracked advisory records across Apache, NetApp, Red Hat. Compare vendor sources and published fix guidance.

Compare the source-linked records below. Ratings and product/version details belong to each advisory; they are not a single CVE-wide score or proof that every listed product is affected. How VulniPulse collects and checks evidence.

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Vendor advisory comparison

Apache

1 advisory
  • Advisory severityHigh7.5

    High [CVE-2026-77791] Uncontrolled Resource Consumption vulnerability in Apache Tomcat during sending of WebSocket close message enabled a DoS attack

    CVE-2026-77791Source published Source updated

    Uncontrolled Resource Consumption vulnerability in Apache Tomcat during sending of WebSocket close message enabled a DoS attack. This issue affects Apache Tomcat: from 11.0.0-M5 through 11.0.25, from 10.1.8 through 10.1.59, from 9.0.74 through 9.0.121. The following versions were EOL at the time the CVE was created but are known to be affected: from 8.5.88 through 8.5.100. Other unsupported versions may also be affected. Users are recommended to upgrade to version 11.0.26, 10.1.60 or 9.0.122, which fix the issue.

    Affected products in this advisory
    • Apache Tomcat
    Source-reported affected versions
    • 11.0.0-M5 through 11.0.25
    • 10.1.8 through 10.1.59
    • 9.0.74 through 9.0.121.
    • 8.5.88 through 8.5.100.

    2 more entries in the full advisory.

    Source-reported fixed versions
    • 11.0.26
    • 10.1.60
    • 9.0.122
    Mitigation guidance
    • Users are recommended to upgrade to version 11.0.26, 10.1.60 or 9.0.122, which fix the issue.
    Full advisory and evidenceOpen source bulletin

NetApp

1 advisory
  • Advisory severityHigh7.5

    High [CVE-2026-77791] Apache Tomcat Vulnerability in NetApp Products

    NTAP-20261002-0008Source published Source updated

    Apache Tomcat versions 9.0.74 through 9.0.121, 10.1.8 through 10.1.59, and 11.0.0-M5 through 11.0.25 are susceptible to a vulnerability which when successfully exploited could lead to Denial of Service (DoS). Successful exploitation of this vulnerability could lead to 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
    • 9.0.74
    • 9.0.121
    • 10.1.8
    • 10.1.59

    2 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 severityHigh7.5

    High [CVE-2026-77791] Denial of Service via busy wait during WebSocket close

    CVE-2026-77791Source published Source updated

    Denial of Service via busy wait during WebSocket close. Red Hat rates this important (CVSS 7.5). Weakness: CWE-1050. Red Hat lists fixing advisory RHSA-2026:68257 with package tomcat11-main-11.0.26-0.1.hum1, tomcat10-main-10.1.60-0.1.hum1. Affected products named by the advisory: Red Hat Hardened Images; Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9; and 4 more.

    Related products — impact not confirmed
    • Red Hat Hardened Images
    • Red Hat Enterprise Linux 10
    • Red Hat Enterprise Linux 8
    • Red Hat Enterprise Linux 9

    4 more entries in the full advisory.

    Source-reported affected versions
    • 11.0.0
    • 11.0.25
    • 10.1.8
    • 10.1.59

    4 more entries in the full advisory.

    Source-reported fixed versions
    • tomcat11-main-11.0.26-0.1.hum1
    • tomcat10-main-10.1.60-0.1.hum1
    • RHSA-2026:68257
    Mitigation guidance
    • Red Hat is not aware of a practical temporary workaround that fully mitigates this issue or meets Red Hat Product Security's standards for usability, deployment, applicability, or stability. Customers are advised to apply the relevant security updates when/if they become available.
    Full advisory and evidenceOpen source bulletin

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