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Highest advisory severityCritical 2 vendors · 2 advisories

CVE-2026-19445: CPython Vulnerability in NetApp Products

Not in the CISA KEV catalog. Critical advisory severity (CVSS 9.2, NetApp).

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.

NVD detail CVE.org

CVE-2026-19445 key facts

CISA KEV
Not listed (catalog checked )
Highest advisory severity
Critical
CVSS base score
9.2 (NetApp), 8.1 (Red Hat)
Weakness
CWE-416
Fixed releases
  • Red Hat: rhui5/cds-rhel9:1791978528, python3.14-0:3.14.8-1.el9_8, python3.14-0:3.14.8-1.el10_2, python3.12-0:3.12.15-1.el9_8, python3-15-main-3.15.0~rc2-1.1.hum1, python3.12-0:3.12.15-1.el10_2 and 6 more in the advisory
Vendor advisories
2 from NetApp, Red Hat
VulniPulse record
Published · Updated

Scores, vectors, weaknesses and fixed releases are quoted from vendor advisories that cover only CVE-2026-19445; bulletin-wide values are not repeated here.

Is CVE-2026-19445 exploited?

No exploitation is reported in the sources VulniPulse tracks: CVE-2026-19445 is not in the CISA KEV catalog (checked ) and no tracked advisory for it reports exploitation. That is not proof the vulnerability cannot be exploited.

How do I fix CVE-2026-19445?

Upgrade to a fixed release named by the vendor:

  • Red Hat: rhui5/cds-rhel9:1791978528, python3.14-0:3.14.8-1.el9_8, python3.14-0:3.14.8-1.el10_2, python3.12-0:3.12.15-1.el9_8, python3-15-main-3.15.0~rc2-1.1.hum1, python3.12-0:3.12.15-1.el10_2
  • Restrict Python TLS servers that use SSLContext.sni_callback to trusted clients. Keep a strong reference to every SSLContext that registers an SNI callback for the lifetime of the server so the original context cannot be garbage-collected while connections remain open. Prefer wrapping the listening socket with a long-lived SSLContext; that common pattern is not affected. Host heap allocator hardening increases the difficulty of turning the use-after-free into reliable code execution but does not prevent process crashes. (Red Hat)

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Vendor advisory comparison

NetApp

1 advisory
  • Advisory severityCritical9.2

    Critical [CVE-2026-19445] CPython Vulnerability in NetApp Products

    NTAP-20261106-0004Source published Source updated

    CPython versions through 3.10.21, 3.11.0 through 3.11.16, 3.12.0 through 3.12.14, 3.13.0 through 3.13.15, 3.14.0 through 3.14.7 and 3.15.0a1 through 3.15.0rc2 are susceptible to a vulnerability that allows an attacker to utilize remote, unauthenticated TLS clients to crash a server. Successful exploitation of this vulnerability could lead to disclosure of sensitive information, addition or modification of data or Denial of Service (DoS). Affected products: Active IQ Unified Manager for Microsoft Windows. 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
    • Active IQ Unified Manager for Microsoft Windows
    Source-reported affected versions
    • 3.10.21
    • 3.11.0
    • 3.11.16
    • 3.12.0

    6 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 severityHigh8.1

    High [CVE-2026-19445] Use-after-free of a server-side SSLContext when sni_callback switches contexts

    CVE-2026-19445Source published Source updated

    Use-after-free of a server-side SSLContext when sni_callback switches contexts. Red Hat rates this important (CVSS 8.1). Weakness: CWE-416. Red Hat lists fixing advisory RHSA-2026:77028 with package rhui5/cds-rhel9:1791978528, python3.14-0:3.14.8-1.el9_8, python3.14-0:3.14.8-1.el10_2, python3.12-0:3.12.15-1.el9_8. Affected products named by the advisory: Red Hat Enterprise Linux 9; Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 8.

    Related products — impact not confirmed
    • Red Hat Enterprise Linux 9
    • Red Hat Enterprise Linux 10
    • Red Hat Enterprise Linux 8
    Source-reported affected versions
    Affected-version details not available in this record.
    Source-reported fixed versions
    • rhui5/cds-rhel9:1791978528
    • python3.14-0:3.14.8-1.el9_8
    • python3.14-0:3.14.8-1.el10_2
    • python3.12-0:3.12.15-1.el9_8

    8 more entries in the full advisory.

    Mitigation guidance
    • Restrict Python TLS servers that use SSLContext.sni_callback to trusted clients. Keep a strong reference to every SSLContext that registers an SNI callback for the lifetime of the server so the original context cannot be garbage-collected while connections remain open. Prefer wrapping the listening socket with a long-lived SSLContext; that common pattern is not affected. Host heap allocator hardening increases the difficulty of turning the use-after-free into reliable code execution but does not prevent process crashes.
    Full advisory and evidenceOpen source bulletin

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