CVE-2026-110604

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.

References

• https://github.com/michaelrsweet/mxml/blob/v4.0.6/mxml-file.c#L1860-L1887
• https://github.com/michaelrsweet/mxml/commit/367c7ddd3387f65e867d776216de274bcaa3dae1
• https://hackmd.io/@haind-pwn/mxml-strtod-locale-stack-overflow
• https://www.vulncheck.com/advisories/mini-xml-4.0.0-through-4.0.6-stack-out-of-bounds-write-via-mxml-strtod
• https://hackmd.io/@haind-pwn/cve-2026-110604-mxml-strtod-locale-stack-overflow