What’s Vulnerable › Vulnerabilities

CVE-2026-55738: Stack Buffer Overflow in rxi/microtar raw_to_header() via non-null-terminated TAR name field

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-06-17 · updated 2026-10-26
• Weakness: CWE-121

Description

A stack-based buffer overflow exists in the raw_to_header function in src/microtar.c in rxi microtar 0.1.0. The function copies the 100-byte name and linkname fields of a TAR header with strcpy without guaranteeing null termination of the source.

Affected products

• rxi microtar: 0.1.0

References

• https://github.com/rxi/microtar
• https://github.com/rxi/microtar/blob/master/src/microtar.c#L111
• https://raw.githubusercontent.com/rxi/microtar/master/src/microtar.c

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