CVE-2026-48850

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Summary

CVECVE-2026-48850
StatePUBLISHED
Assignermitre
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-05-25 21:16:35 UTC
Updated2026-05-27 19:14:46 UTC
DescriptionPuTTY 0.72 before 0.84 has a double free in RSA KEX.

Risk And Classification

Primary CVSS: v3.1 5.9 MEDIUM from [email protected]

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

EPSS: 0.000390000 probability, percentile 0.118650000 (date 2026-05-27)

Problem Types: CWE-415 | CWE-415 CWE-415 Double Free

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary5.9MEDIUMCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
3.1[email protected]Secondary3.7LOWCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
3.1CNACVSS3.7LOWCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

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

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Putty Putty All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA PuTTY PuTTY affected 0.72 0.84 custom Not specified

References

ReferenceSourceLinkTags
www.chiark.greenend.org.uk/~sgtatham/putty/wishlist/rsakex-double-free.html [email protected] www.chiark.greenend.org.uk Patch, Vendor Advisory
lists.tartarus.org/pipermail/putty-announce/2026/000042.html [email protected] lists.tartarus.org Release Notes
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis
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