[UPDATE] [medium] libssh: Multiple vulnerabilities enable file manipulation and DoS

mediumCVE-2026-0964 CVE-2026-0965 CVE-2026-0966 CVE-2026-0967 CVE-2026-0968

An attacker can exploit multiple vulnerabilities in libssh to manipulate files or cause a denial-of-service condition.

CSIRTS triage

vendor: libssh product: libssh Path traversal Denial of service

What: Multiple vulnerabilities in libssh enable attackers to manipulate files or cause denial-of-service conditions.
Who is affected: All users of libssh are potentially affected.
Urgency: Medium urgency; file manipulation and DoS threats warrant timely remediation.
Action: Update libssh to a patched version when available from the project.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source: CERT-Bund (BSI) Security Advisories (DE · national-cert · site)
Severity: medium
Published: 2026-08-03
Exploitation: Not in CISA KEV at last sync
Language: Machine-translated to English — verify against the original

Original advisory: https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-0446

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-09640.41% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 34% of all EPSS-scored CVEs.
Low exploitation riskCVE-2026-09650.16% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 5% of all EPSS-scored CVEs.
Low exploitation riskCVE-2026-09660.58% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 45% of all EPSS-scored CVEs.
Low exploitation riskCVE-2026-09670.22% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 13% of all EPSS-scored CVEs.
Low exploitation riskCVE-2026-09680.44% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 36% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-0964	coverage & exploitation status	NVD · CVE.org
CVE-2026-0965	coverage & exploitation status	NVD · CVE.org
CVE-2026-0966	coverage & exploitation status	NVD · CVE.org
CVE-2026-0967	coverage & exploitation status	NVD · CVE.org
CVE-2026-0968	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

unknownDSA-6410-1 libssh - security updatedebian

Recent advisories for libssh

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

high[NEW] [high] libssh: Multiple vulnerabilitiescert-bund · 2026-08-04
medium[UPDATE] [medium] libssh: Vulnerability allows Denial of Servicecert-bund · 2026-08-03
unknownDSA-6410-1 libssh - security updatedebian · 2026-08-02
highCVE-2026-59851: A flaw was found in libssh. On servers with GSSAPIKeyExchange enabled, the gssapi-keyex path d…nvd · 2026-07-21
mediumCVE-2026-59850: A flaw was found in libssh. If data packets are processed after a channel is closed, channel d…nvd · 2026-07-21
lowCVE-2026-59849: A flaw was found in libssh. Logic errors in automatic certificate-based public key authenticat…nvd · 2026-07-21