Information Exposure Through Timing Discrepancy in GnuTLS - CVE-2026-5419
Published: April 30, 2026
Vulnerability identifier: #VU128580
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-5419
CWE-ID: CWE-208
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: GnuTLS
Affected software:
GnuTLS
GnuTLS
Detailed vulnerability description
The vulnerability allows a remote attacker to disclose sensitive information.
The vulnerability exists due to observable timing discrepancy in PKCS#7 padding check during decryption when processing ciphertext. A remote attacker can send specially crafted ciphertext to disclose sensitive information.
How to mitigate CVE-2026-5419
Install security update from vendor's website.