CVE-2026-57053 — Security Box Score

CVE · referencelatest edition

Reference page — cumulative record through Wednesday, August 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-57053LOW

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_un…

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   L   H   L   N  U  N  L  N    2.5   .0015    4.6     —

AFFECTED
  Product  Versions     Fixed
  libidn   unspecified  —

TIMELINE
  Jun 23  EXPLOIT PUBLISHED — CVE-2026-57053 (GNU libidn). Public exploit reference added.
  Jun 23  Reserved by mitre
  Jun 23  Published (CNA: mitre)

CWE-1284 · CNA: mitre · CVSS v3.1 · 2 references · NVD status: Analyzed

Description

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.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
June 23, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2026-57053 (GNU libidn). Public exploit reference added.
June 23, 2026	Reserved	Reserved by mitre
June 23, 2026	Published	Published (CNA: mitre)

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
GNU	libidn	—	—	—

Weaknesses

CWE-1284

References (2)

https://lists.gnu.org/archive/html/help-libidn/2026-05/msg00000.html [Exploit, Mailing List]
https://lists.gnu.org/archive/html/help-libidn/2026-06/msg00001.html [Mailing List]

Authoritative record: CVE-2026-57053 at cve.org

Vendors: gnu

Weaknesses: CWE-1284

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-57053 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Wednesday, August 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.