Is there a public exploit for CVE-2026-66032?

No public exploit for CVE-2026-66032 was found in Exploit-DB, Metasploit, Nuclei templates or public proof-of-concept repositories. That is an absence of evidence rather than proof that none exists.

How severe is CVE-2026-66032?

CVE-2026-66032 scores CVSS 8.7 (v4.0), rated high. EPSS puts the chance of exploitation in the next 30 days at 0.45%.

What does CVE-2026-66032 affect?

CVE-2026-66032 affects libssh2 libssh2.

8.7 High

libssh2 through 1.11.1, fixed in commit 5e47761, contains a double-free vulnerability in the sftpopen() function in src/sftp.c that allows…

CVE-2026-66032

libssh2 through 1.11.1, fixed in commit 5e47761, contains a double-free vulnerability in the sftpopen() function in src/sftp.c that allows a malicious SSH server to corrupt the heap of any authenticated client opening an SFTP session. When a server responds to SSHFXPOPEN with SSHFXPSTATUS containing FXOK, the response data buffer is freed, and if a subsequent sftppacketrequire() call returns a specific error such as LIBSSH2ERRORCHANNELPACKETEXCEEDED, the same pointer is freed a second time, enabling tcache dup conditions on glibc systems that allow overlapping allocations and function pointer overwrites.

Assessment

CVSS: 8.7 (v4.0)
Severity: High
EPSS: 0.45% chance of exploitation in the next 30 days
Known exploited: Not listed in CISA KEV
Exploit availability: Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published: 24 July 2026
Last updated: 10 November 2026
Affected: libssh2 · libssh2
Assigner: VulnCheck

CVSS vectorCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

At the source

EUVD (ENISA)

References

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