PT-2026-43122 · Putty · Putty

Sgtatham + 1 · Published 2026-05-25 · Updated 2026-05-25 · CVE-2026-48850

NVD

CVSS v3.1

5.9

Medium

Base vector

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

PuTTY 0.72 before 0.84 has a double free in RSA KEX.

Fix

Double Free

Weakness Enumeration

CWE-415

Related Identifiers

CVE-2026-48850

Affected Products

Putty

References · 3

• https://nvd.nist.gov/vuln/detail/CVE-2026-48850 · Security Note
• https://chiark.greenend.org.uk/~sgtatham/putty/wishlist/rsakex-double-free.html · Vendor Advisory
• https://lists.tartarus.org/pipermail/putty-announce/2026/000042.html · Note