CVE-2026-56854VulnerabilityPublished 14 Sep 2026Updated 17 Sep 2026

SUSE · Security update for keybase-client

Affects SUSESource GCVE Database

Compare

Mentioned vulnerabilities

Authoritative record:CVE-2026-56854· High 7.5

Not known to be exploited · CVSS 7.5 High : upgrade SUSE ssh to 0.55.0 soon.

Data as of 31 Oct 2026, 20:20 UTC

CVSS 3.1 base score

7.5High

How severe the flaw is on the 0–10 CVSS scale.

EPSS: 0.4% chance of exploitation in 30 days – higher than 38% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in 0.55.0

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

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

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Network: The vulnerable component is bound to the network stack and the set of possible attackers extends beyond the other options listed, up to and including the entire Internet. Such a vulnerability is often termed 'remotely exploitable' and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).
Attack Complexity: Low: Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success against the vulnerable component.
Privileges Required: None: The attacker is unauthorized prior to attack, and therefore does not require any access to settings or files to carry out an attack.
User Interaction: None: The vulnerable system can be exploited without any interaction from any user.
Scope: Unchanged: An exploited vulnerability can only affect resources managed by the same security authority. In this case, the vulnerable component and the impacted component are either the same, or both are managed by the same security authority.
Confidentiality: High: There is total loss of confidentiality, resulting in all resources within the impacted component being divulged to the attacker. Alternatively, access to only some restricted information is obtained, but the disclosed information presents a direct, serious impact.
Integrity: None: There is no loss of integrity within the impacted component.
Availability: None: There is no impact to availability within the impacted component.

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 28 Aug 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 31 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade golang.org/x/crypto/ssh to 0.55.0.

Affected software

Product	Affected	Fixed in
golang.org/x/cryptogolang.org/x/crypto/ssh	Affected <0.55.0	Fixed in 0.55.0
Gogolang.org/x/crypto/ssh`pkg:golang/golang.org/x/crypto/ssh`Other threats	Affected <0.55.0	Fixed in 0.55.0

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

A security update is available that patches the affected crypto dependency and upgrades the Go runtime to version 1.26. Users of keybase-client should apply this update promptly to remediate the authentication bypass and deadlock vulnerabilities. No additional mitigation steps are indicated beyond applying the official update.

Description

A security update for the keybase-client addresses multiple vulnerabilities including authentication bypass and deadlocks in the crypto/ssh library. The update involves patching the affected crypto dependency and upgrading to Go 1.26 to incorporate the updated crypto library. These vulnerabilities are identified by CVE-2026-56854, CVE-2026-56855, and CVE-2026-78662. The issues could potentially allow bypassing authentication mechanisms and cause deadlocks, impacting the reliability and security of the client.

Impact

The vulnerabilities could allow an attacker to bypass authentication controls and cause deadlocks within the crypto/ssh library, potentially leading to unauthorized access or denial of service conditions in the keybase-client. This compromises the security and stability of the client application.

Summary

This update for keybase-client fixes three vulnerabilities (CVE-2026-56854, CVE-2026-56855, CVE-2026-78662) related to authentication bypass and deadlocks in the crypto/ssh library. The remediation includes applying a patch (update-go-crypto.patch) to update the affected cryptographic dependency and upgrading the Go runtime to version 1.26, which is required to support the updated crypto library. These changes address critical security flaws in the keybase-client's cryptographic components.

References

Community reviews

Loading reviews…

Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 17 Sep 2026, 02:04 UTC

Technical details

References

Community reviews

Related threats