CVE-2026-57053

VendorgnuProductlibidnDiscoveredJun 23, 2026UpdatedOct 25, 2026

GNU libidn before 1.44 is prone to out-of-bounds reads of uninitialized memory in the ToUnicode APIs because of mishandling in idna_to_unicode_internal. The affected code is not present in libidn2.

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CVSS v3.1

4 MEDIUM

EPSS

0.14%

probability of exploitation in 30 days

CISA KEV

Not listed

no confirmed exploitation reported

News coverage

sources referencing this CVE

Related IOCs

seen in the same coverage

CVSS v3.1 Detail

Attack VectorLOCAL

Attack ComplexityHIGH

Privileges RequiredNONE

User InteractionNONE

ScopeUNCHANGED

ConfidentialityNONE

IntegrityLOW

AvailabilityLOW

CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L

Connections

2 relationships

CWE-1284

source

Timeline

disclosure → media coverage

Jun 23, 2026

Disclosure — published as a CVE record. · last revised by NVD Oct 25, 2026