CVE-2026-5260

HIGH
MEDIUM Priority: 0.06 BB Relevance: 77/100
Published: 2026-05-26 Modified: 2026-10-29 First seen: 2026-10-29 Status: active

Attack Surface

Network Low Complexity No Auth No Interaction

CVSS Vector Breakdown

AV: Network
AC: Low
PR: None
UI: None
S: Unchanged
C: Low
I: None
A: High

Description

A flaw was found in libgnutls. A remote attacker, by sending an extremely short premaster secret during an RSA key exchange to a server using an RSA key backed by a PKCS#11 token, could trigger a short heap overread. This memory corruption vulnerability could lead to information disclosure.

Weakness Classification (1)

Affected Software (1)

VendorProductVersion
— — 0

Bug Bounty Relevance

77 / 100
✓ Network accessible
✓ No authentication
✓ Low complexity
✓ No user interaction

CVSS Score

8.2 / 10.0 v3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H

EPSS — Exploitation Probability

0.77%
Raw Score 0.007690
Percentile 55.5%
Date 2026-10-29

EPSS Trend

2026-10-29
0.00769
2026-10-28
0.00769

Intelligence Sources

mitre ref →
nvd ref →