VulnerabilityPublished 13 Aug 2026Updated 5 Nov 2026

CVE-2025-64076: Keeper commander · cbor2 C extension decoder flaws can cause denial of service

Affects keeper-commanderSource GCVE Database

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Authoritative record:CVE-2025-64076· High 7.5

Not known to be exploited · CVSS 7.5 High : upgrade to 17.1.13 soon.

Data as of 5 Nov 2026, 19:50 UTC

CVSS 3.1 base score

7.5High

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

Patch: Available – fixed in 17.1.13

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

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

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

Attack Complexity: Low: Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success against the vulnerable component.
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).
Availability: High: There is total loss of availability, resulting in the attacker being able to fully deny access to resources in the impacted component; this loss is either sustained (while the attacker continues to deliver the attack) or persistent (the condition persists even after the attack has completed). Alternatively, the attacker has the ability to deny some availability, but the loss of availability presents a direct, serious consequence to the impacted component (e.g., the attacker cannot disrupt existing connections, but can prevent new connections; the attacker can repeatedly exploit a vulnerability that, in each instance of a successful attack, leaks a only small amount of memory, but after repeated exploitation causes a service to become completely unavailable).
Confidentiality: None: There is no loss of confidentiality within the impacted component.
Integrity: None: There is no loss of integrity within the impacted 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.
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.
User Interaction: None: The vulnerable system can be exploited without any interaction from any user.

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 18 Nov 2025
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 5 Nov 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 keeper-commander to 17.1.13.

Affected software

Product	Affected	Fixed in
Homebrewkeeper-commander`pkg:brew/keeper-commander`Other threats	Affected >=17.1.12 <17.1.13	Fixed in 17.1.13

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

AI-suggested

A fix is available in cbor2 version 5.7.1. Users and administrators should upgrade to version 5.7.1 or later to remediate these vulnerabilities. No additional mitigation steps are indicated by the vendor advisory.

Description

CVE-2025-64076 is a high-severity vulnerability in the cbor2 library's C extension decoder affecting versions prior to 5.7.1. It involves an integer underflow causing out-of-bounds reads and a memory leak due to missing reference count releases. These flaws can be exploited remotely by sending crafted CBOR data with multi-byte UTF-8 characters at specific chunk boundaries, leading to denial of service via process crashes or memory exhaustion. The issue affects applications using cbor2's C extension to process untrusted CBOR data, such as web APIs and IoT data collectors. The vulnerability is fixed in version 5.7.1.

Impact

Exploitation of these vulnerabilities can cause denial of service by crashing the process with CBORDecodeEOF exceptions or by exhausting system memory through leaks. This impacts availability of applications processing untrusted CBOR data using the vulnerable cbor2 C extension, including web APIs, IoT data collectors, and message queue processors. There is no impact on confidentiality or integrity reported. Exploitation requires no authentication and can be performed remotely.

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Description

AI analysisMachine-generated, updated 5 Nov 2026, 19:50 UTC

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