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Recorded 31 Oct 2026 at 08:05 UTC. This is what ChangeIntel recorded, including the title, summary, facts and links. It is not a statement of the source's current position. See the latest record.

The historical field “Public exploit code” recorded Nuclei detection-template membership. It did not establish exploit availability. The original recorded fields remain below.

CVEMicrosoft Security Response Center

libexpat through 2.9.0 Integer Overflow in storeAtts via attIndex and nPrefixes

libexpat through 2.9.0 Integer Overflow in storeAtts via attIndex and nPrefixes

What it said

CVE
CVE-2026-118370
Severity
Important
CVSS base score
5.9
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Impact
Not stated
Exploitation detected
Unknown: not stated by MSRC
Publicly disclosed
Unknown: not stated by MSRC
Exploitability
Not assessed
Component
Mariner
Weakness
CWE-190: Integer Overflow or Wraparound
Issued by
VulnCheck
Customer action
Required: follow the MSRC remediation guidance
Affected products
azl3 cmake 3.30.3-15 on Azure Linux 3.0, azl3 expat 2.8.3-2 on Azure Linux 3.0
Updates that fix it
No KB listed
CISA KEV
Not listed in the collected catalog
EPSS
No EPSS score collected
Public detection template
No Nuclei template listed
Published
29 Oct 2026 01:01 UTC
Last revised
31 Oct 2026 01:11 UTC
Revision note
Information published.
Public exploit code
No Nuclei template listed

Source evidence when recorded

Microsoft security releases
Complete at observationRead 31 Oct 2026 at 08:03 UTC
CISA KEV
Complete at observationRead 31 Oct 2026 at 08:03 UTC
FIRST EPSS
Complete at observationRead 31 Oct 2026 at 08:03 UTC
Public detection templates (Nuclei)
Complete at observationRead 31 Oct 2026 at 08:03 UTC

Coverage describes the sources at this observation. A complete read then does not establish their current position.

What changed

  1. Affected products: azl3 expat 2.8.3-2 on Azure Linux 3.0 → azl3 cmake 3.30.3-15 on Azure Linux 3.0, azl3 expat 2.8.3-2 on Azure Linux 3.0 · Severity: Moderate → Important
  2. Detection template: No Nuclei template listed · Customer action: Required: apply the update → Required: follow the MSRC remediation guidance · Public disclosure: No → Unknown: not stated by MSRC · Exploitation detected: Not reported by MSRC → Unknown: not stated by MSRC
Page history

Changes are dated when recorded; day views use the last saved version from that UTC day, and citations stay fixed.

Cite this version
Field-level log (8)

Up to 100 recent field edits are shown; older edits may be outside retention.

  1. 31 Oct 2026 · 08:05:42 UTC Last revised29 Oct 2026 01:01 UTC → 31 Oct 2026 01:11 UTC
  2. 31 Oct 2026 · 08:05:42 UTC Affected productsazl3 expat 2.8.3-2 on Azure Linux 3.0 → azl3 cmake 3.30.3-15 on Azure Linux 3.0, azl3 expat 2.8.3-2 on Azure Linux 3.0
  3. 31 Oct 2026 · 08:05:42 UTC SeverityModerate → Important
  4. 29 Oct 2026 · 20:19:26 UTC Public detection templateNo Nuclei template listed
  5. 29 Oct 2026 · 20:19:26 UTC EPSSNot scored → No EPSS score collected
  6. 29 Oct 2026 · 20:19:26 UTC Customer actionRequired: apply the update → Required: follow the MSRC remediation guidance
  7. 29 Oct 2026 · 20:19:26 UTC Publicly disclosedNo → Unknown: not stated by MSRC
  8. 29 Oct 2026 · 20:19:26 UTC Exploitation detectedNot reported by MSRC → Unknown: not stated by MSRC
ChangeIntel

An IT change radar: releases, security, known issues, retirements, documentation changes, and service status from public sources. Every item links to supporting evidence; dates and statuses can change after they are read.

Sources read 31 Oct 16:14 UTC · 272 of 272 readable · 270 fully read · documentation 469/469 current

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