CVE-2026-7836 Details
Description
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.
A vulnerability exists in Netatalk versions 2.0.0 through 4.4.2, where the hextoint macro improperly decodes uppercase hexadecimal characters. This flaw can lead to filename corruption or inconsistencies in filename lookups, although it does not directly allow for code execution, privilege escalation, or exposure of sensitive data.
Users can upgrade to Netatalk version 4.5.0 or later, which includes the necessary patch. Alternatively, for those using Netatalk 4.4.2, the patch can be applied manually. The Netatalk team advises against proactively applying the patch to existing deployments due to the low likelihood of practical exploitation.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed May 21, 2026CISA-ADP
Assessed May 21, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://netatalk.io/security/CVE-2026-7836 | securin | AdvisoryRemedyVendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-682 | Incorrect Calculation | securin |
Affected Products
| Product | Versions |
|---|---|
| Netatalk | >= 2.0.0, <= 4.4.2 (semver) |
CPE
Remediation
| |
Change History
5 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 23, 2026 | CVE Translated | [email protected] |
| Jun 17, 2026 | CVE Modified | securin |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| May 21, 2026 | CVE Modified | securin |
| May 21, 2026 | New CVE Received | securin |