CVE-2026-5037: mxml mxmlIndexNew mxml-index.c index_sort stack-based overflow

Severity: low (CVSS 3.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-03-29 · updated 2026-06-17
Weakness: CWE-119

Description

A vulnerability was determined in mxml up to 4.0.4. This issue affects the function index_sort of the file mxml-index.c of the component mxmlIndexNew. Executing a manipulation of the argument tempr can lead to stack-based buffer overflow. The attack is restricted to local execution. The exploit has been publicly disclosed and may be utilized. This patch is called 6e27354466092a1ac65601e01ce6708710bb9fa5. A patch should be applied to remediate this issue.

Affected products

mxml: 4.0.0, 4.0.1, 4.0.2, 4.0.3, 4.0.4

References

https://github.com/michaelrsweet/mxml/commit/6e27354466092a1ac65601e01ce6708710bb9fa5
https://github.com/michaelrsweet/mxml/issues/350
https://github.com/michaelrsweet/mxml/issues/350#issuecomment-4051317229
https://github.com/user-attachments/files/25934383/1.xml
https://vuldb.com/submit/778638
https://vuldb.com/vuln/353963
https://vuldb.com/vuln/353963/cti

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