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CVE-2026-28387VulnerabilityPublished Updated

DANE Client Code · Potential Use-after-free

Affects MicrosoftSource GCVE Database

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Mentioned vulnerabilities

Not known to be exploited.

Data as of 30 Oct 2026, 06:59 UTC

Severity
High

Rated by Threat Radar · No CVSS score from NVD or the CNA

EPSS
0.6% chance of exploitation in 30 days – higher than 51% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 9 Apr 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 29 Oct 2026.

What to do

Affected software

ProductAffectedFixed in
Microsoft Security Response Center MicrosoftAffected
  • =3.0
  • =2.0
  • =3.1.4-12.1.aarch64
  • Microsoft
  • Azure Linux
  • 3.0
  • Azure Linux 3.0
  • 2.0
Fixed in–

AI-suggested

A security update fixing these vulnerabilities has been released for the affected OpenSSL 3 versions distributed by SUSE. Users should apply the official patches provided by their vendor to remediate these issues. Patch status is confirmed by the vendor advisory. No additional mitigation steps are specified.

Description

Multiple vulnerabilities including use-after-free, NULL pointer dereferences, heap buffer overflow, and incorrect failure handling were identified in OpenSSL 3 components such as DANE client code and cryptographic operations. These issues affect OpenSSL 3 versions distributed by SUSE and have been assigned CVE identifiers CVE-2026-28387, CVE-2026-28388, CVE-2026-28389, CVE-2026-31789, and CVE-2026-31790. The severity is rated high. A security update addressing these vulnerabilities has been released.

References

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