Description
Mini-XML 4.0.0 through 4.0.6 contains an off-by-one stack out-of-bounds write in mxml_strtod() when the locale decimal point is not '.'. Attackers can supply XML with a 63-digit REAL value followed by '.' to write a NUL byte past the 64-byte stack buffer, corrupting stack memory or crashing the process.
References5
- github.com/michaelrsweet/mxml/blob/v4.0.6/mxml-file.c#L1860-L18…
- github.com/michaelrsweet/mxml/commit/367c7ddd3387f65e867d776216…
- hackmd.io/@haind-pwn/mxml-strtod-locale-stack-overflow
- www.vulncheck.com/advisories/mini-xml-4.0.0-through-4.0.6-stack…
- hackmd.io/@haind-pwn/cve-2026-110604-mxml-strtod-locale-stack-o…
Metrics
- CVSS 3.1
-
3.6
LOW
Score source: CNA
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:L - CVSS 4.0
-
2.0
LOW
Score source: CNA
CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:P/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - EPSS — exploit probability
- 0% percentile: 12 · as of 11 November 2026
- CWE
- CWE-193
Could this be exploited in your environment?
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