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CVE-2026-91765VulnerabilityPublished Updated

Server-Side cleanup_xml_node · SOAP: Unbounded Recursion

Affects MicrosoftSource GCVE Database

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Authoritative record:CVE-2026-91765· High 7.5

Not known to be exploited · CVSS 7.5 High · fixed in 8.5.11 : patch Microsoft soon.

Data as of 14 Nov 2026, 08:48 UTC

CVSS 3.1 base score
7.5High
How severe the flaw is on the 0–10 CVSS scale.
Patch
Available – fixed in 8.5.11, 8.4.26, 8.3.35 +1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 25 Sep 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 13 Nov 2026.

What to do

Upgrade PHP to 8.5.11, 8.4.26, 8.3.35 or 8.2.34.

Affected software

ProductAffectedFixed in
PHP GroupPHPAffected
  • ≥ 8.5.*, < 8.5.11
Fixed in
  • 8.5.11
PHP GroupPHPAffected
  • ≥ 8.4.*, < 8.4.26
Fixed in
  • 8.4.26
PHP GroupPHPAffected
  • ≥ 8.3.*, < 8.3.35
Fixed in
  • 8.3.35
PHP GroupPHPAffected
  • ≥ 8.2.*, < 8.2.34
Fixed in
  • 8.2.34

Description

To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle

References

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