CVE-2026-57053

CVSS 4 MEDIUMEPSS 0.1%CWE-1284

Vexday Risk Score

13Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 4EPSS 0.1%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

23 Jun 2026Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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.

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

Affected products

GNU · libidn

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References

https://lists.gnu.org/archive/html/help-libidn/2026-05/msg00000.html https://lists.gnu.org/archive/html/help-libidn/2026-06/msg00001.html