Search/CVE-2026-5260
● CVE — High

CVE-2026-5260

DiscoveredMay 26, 2026UpdatedOct 30, 2026

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.

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CVSS v3.1
8.2 HIGH
EPSS
0.77%
probability of exploitation in 30 days
CISA KEV
Not listed
no confirmed exploitation reported
News coverage
2
sources referencing this CVE
Related IOCs
0
seen in the same coverage
EPSS Trend
Sep 25, 2026 → Oct 26, 2026
▼ 0.18pp
0.95% → 0.77% over 2 tracked changes
CVSS v3.1 Detail
Attack VectorNETWORK
Attack ComplexityLOW
Privileges RequiredNONE
User InteractionNONE
ScopeUNCHANGED
ConfidentialityLOW
IntegrityNONE
AvailabilityHIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
Connections
3 relationships
Timeline
disclosure → media coverage
May 20, 2026
ubuntu.com reports: USN-8284-1: GnuTLS vulnerabilities
May 26, 2026
Disclosure — published as a CVE record. · last revised by NVD Oct 30, 2026
Jul 6, 2026
ubuntu.com reports: USN-8502-1: GnuTLS vulnerabilities