CVE-2026-5037Public exploit

Local process crash via partition index underflow

Published Mar 29, 2026 · Updated Mar 29, 2026

Heap-buffer under-read in Mini-XML 4.0.0 through 4.0.4 allows local users to crash a consuming process via malformed XML. The index_sort partition routine recurses with tempr minus one when tempr is zero, underflowing the node-array boundary and reading before the heap allocation. An application must parse attacker-controlled XML and then call mxmlIndexNew; the demonstrated consequence is a process crash, not code execution.

CVSS severity3.3
Low
EPSS probability0.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap-buffer under-read in Mini-XML 4.0.0 through 4.0.4 allows local users to crash a consuming process via malformed XML. The index_sort partition routine recurses with tempr minus one when tempr is zero, underflowing the node-array boundary and reading before the heap allocation. An application must parse attacker-controlled XML and then call mxmlIndexNew; the demonstrated consequence is a process crash, not code execution.

The record

CVE
CVE-2026-5037
Published
Mar 29, 2026
Updated
Mar 29, 2026
Vendor
Michael R Sweet
Product
Mini-XML
Classifications
CWE-121, CWE-119, T1489
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 29, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 29, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=4.0.0
  2. Affected versionversion=4.0.1
  3. Affected versionversion=4.0.2
  4. Affected versionversion=4.0.3
  5. Affected versionversion=4.0.4

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Michael R Sweet · Mini-XMLversion=4.0.0; version=4.0.1; version=4.0.2; version=4.0.3; version=4.0.4

Published CVSS scores

1.9VulDBCVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P
3.3VulDBCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
1.7VulDBAV:L/AC:L/Au:S/C:N/I:N/A:P

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-121Stack-based Buffer Overflow
CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
T1489Service Stop

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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