CVE-2026-3731

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

• ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
• AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
• Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.63% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 47.8% of scored records. A rank, not a probability.

NVD base score

6.9 (CVSS v4.0), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

NVD analysis status

Analyzed. NVD last modified this record on 2026-06-17.

Red Hat severity

Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2026-03-08 10:32Z6 MO AGO

Last updated

2026-03-11 19:50Z5 MO AGO

Reserved

2026-03-07

Assigning CNA

VulDB

Record state

PUBLISHED

Severity

Medium (CVSS 6.9)

CNA CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X

Weaknesses

• CWE-119Improper Restriction of Operations within the Bounds of a Memory BufferClass
• CWE-125Out-of-bounds ReadBase

Data version

5.2

Document digest

235a58a028f785a7f2db02aa251b9f5fa5b2e47249d9a42dbc1151e87d008d71

• vuldb.comVDB-349709 | libssh SFTP Extension Name sftp.c sftp_extensions_get_data out-of-boundshttps://vuldb.com/?id.349709vdb-entrytechnical-description
• vuldb.comVDB-349709 | CTI Indicators (IOB, IOC, IOA)https://vuldb.com/?ctiid.349709signaturepermissions-required
• vuldb.comSubmit #767120 | libssh.org libssh libssh < 0.11.4; < 0.12.0 Out-of-Bounds Readhttps://vuldb.com/?submit.767120third-party-advisory
• www.libssh.orghttps://www.libssh.org/security/advisories/libssh-2026-sftp-extensions.txtrelated
• gitlab.comhttps://gitlab.com/libssh/libssh-mirror/-/commit/855a0853ad3abd4a6cd85ce06fce6d8d4c7a0b60patch
• www.libssh.orghttps://www.libssh.org/files/0.12/libssh-0.12.0.tar.xzpatch