Inconsistent interpretation of HTTP requests in Netatalk - CVE-2026-45354
Published: July 12, 2026
Vulnerability identifier: #VU137331
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-45354
CWE-ID: CWE-444
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Netatalk
Affected software:
Netatalk
Netatalk
Detailed vulnerability description
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to inconsistent interpretation of protocol fields in the DSI packet receiver when processing crafted DSI packets. A remote attacker can send a specially crafted DSIFUNC_CMD packet with a non-zero dsi_code value to cause a denial of service.
The issue can be triggered before authentication after completing DSIOpenSession, and leftover attacker-controlled bytes in the readahead buffer are interpreted as a subsequent DSI packet header.
How to mitigate CVE-2026-45354
Install security update from vendor's website.