Vulnerability in PuTTY (CVE-2026-48850)
Summary
Vulnerability in PuTTY (CVE-2026-48850). Risk of unauthorized operations or information disclosure.
Original description
The description as published by the source.
PuTTY 0.72 before 0.84 has a double free in RSA KEX.
Source: GitHub Security Advisories (Global) NVD GitHub Advisory
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A weakness called CVE-2026-48850 was discovered in PuTTY.
Severity is Low (CVSS 3.7/10). Real-world exploitation is unlikely but a fix is still recommended.
What you should do: update the affected software to the latest version. If unsure, ask your IT team or search the vendor's site for "PuTTY CVE-2026-48850".
CVE-2026-48850 (PuTTY). Severity: Low / CVSSv3 3.7. Category: CWE-415.
Response plan:
- Check the vendor advisory for affected versions and the patched release.
- If a vulnerable version is running in production, schedule maintenance (urgency from KEV/CVSS).
- If no patch yet, mitigate via WAF rule, disabling the affected feature, etc.
- Monitor logs / SIEM for known IOC and PoC signatures of this CVE.
PoCs and fix commits: see the 'References' section, MITRE, and NVD.
A weakness (CVE-2026-48850) in PuTTY. A serious software flaw has been identified.
Target versions of PuTTY (see vendor advisory). If running in production, identify exposure immediately.
Severity: Low (CVSS 3.7/10). Real-world exploitation is unlikely but a fix is still recommended.
Update to the patched release as listed in the vendor advisory. (Typical mitigation pattern for CWE-415)
If a patch is not yet available, consider disabling the affected feature, applying WAF rules, blocking via network ACLs, or isolating the vulnerable version.
Check version information, scan dependencies via SBOM, and monitor SIEM for IOC and PoC signatures related to this CVE.
Fix status by distribution
Fixed packages published by each distribution for this CVE
- Debian DEBIAN-CVE-2026-48850 putty
- Ubuntu UBUNTU-CVE-2026-48850 putty
References
- patch cve@mitre.org
- web nvd.nist.gov
- web cve@mitre.org
- web github.com