CVE-2026-7836 PUBLISHED

hextoint macro uppercase bug

Assigner: securin
Reserved: 05.05.2026 Published: 21.05.2026 Updated: 21.05.2026

An incorrect calculation in the hextoint macro in Netatalk 2.0.0 through 4.4.2 due to improper uppercase character handling allows a remote authenticated attacker to cause limited data modification via crafted hexadecimal input.

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N
CVSS Score: 3.1

Attack Vector	Network	Scope	Unchanged
Attack Complexity	High	Confidentiality Impact	None
Privileges Required	Low	Integrity Impact	Low
User Interaction	None	Availability Impact	None

CVSS 3.1

Product Status

Vendor	Netatalk
Product	Netatalk
Versions	Default: unaffected affected from 2.0.0 to 4.4.2 (incl.) Version 4.5.0 is unaffected

Credits

Arjun Basnet from Securin finder

References

Netatalk Security Advisory CVE-2026-7836

Problem Types

Incorrect Calculation CWE