VulnerabilityPublished 29 Oct 2026

CVE-2026-93010: Red Hat Ceph Storage 9 · Missing Authorization

Affects Red Hat Ceph Storage 9Source CVE Database V5

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Not known to be exploited · CVSS 4.3 Medium.

Data as of 29 Oct 2026, 14:52 UTC

CVSS 3.1 base score

4.3Medium

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

Thin evidence

One scorer or none

CVSS scores by source
CNA (redhat)	CVSS 3.1	4.3

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

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

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

Attack Vector: Adjacent: The vulnerable component is bound to the network stack, but the attack is limited at the protocol level to a logically adjacent topology. This can mean an attack must be launched from the same shared physical (e.g., Bluetooth or IEEE 802.11) or logical (e.g., local IP subnet) network, or from within a secure or otherwise limited administrative domain (e.g., MPLS, secure VPN to an administrative network zone).
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: Low: There is some loss of confidentiality. Access to some restricted information is obtained, but the attacker does not have control over what information is obtained, or the amount or kind of loss is limited. The information disclosure does not cause a direct, serious loss to the impacted component.
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 29 Oct 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 29 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

Affected software

Product	Affected	Fixed in
Red Hat Ceph Storage 9rhceph/alloy-rhel10	Affected–	Fixed in–
Red Hat Enterprise Linux 10dnsmasq	Affected–	Fixed in–
Red Hat Enterprise Linux 6dnsmasq	Affected–	Fixed in–
Red Hat Enterprise Linux 7dnsmasq	Affected–	Fixed in–
Red Hat Enterprise Linux 8dnsmasq	Affected–	Fixed in–
Red Hat Enterprise Linux 9dnsmasq	Affected–	Fixed in–

AI-suggested

Red Hat advises the following mitigations: 1) Prefer configuring leasequery with allowed source addresses (--leasequery=<addr>[/prefix]) to restrict which relays can query; 2) Do not enable leasequery unless necessary, as it is off by default; 3) If unrestricted leasequery is required, use firewall rules to limit which hosts can send DHCP packets to dnsmasq. Red Hat default configurations do not enable leasequery, and current shipped dnsmasq versions do not include this feature, reducing exposure.

Description

CVE-2026-93010 is a vulnerability in dnsmasq used by Red Hat Ceph Storage 9 where enabling DHCP leasequery without restricting source addresses allows any host on the local network to request DHCP lease records. This can disclose assigned IP addresses, MAC addresses, hostnames, and lease metadata. The leasequery feature is disabled by default and must be explicitly enabled by an administrator. The vulnerability is rated as low impact because the exposed information is not highly sensitive and is often accessible by other means on local networks.

Impact

An attacker on the local network can obtain DHCP lease information such as IP addresses, MAC addresses, hostnames, and lease metadata if leasequery is enabled without source restrictions. This information disclosure is considered low impact because the data is not highly sensitive and can often be obtained through other local network protocols. There is no impact on integrity or availability.

Summary

The vulnerability arises from dnsmasq's DHCP leasequery feature when enabled without specifying allowed source addresses, resulting in no verification of the query sender. This allows an attacker on the local network to retrieve DHCP lease information including IP addresses, MAC addresses, hostnames, and related metadata. The feature is opt-in and off by default. Red Hat's default dnsmasq versions in RHEL and RHIVOS do not include the leasequery feature as it was introduced in dnsmasq 2.92, while Red Hat ships version 2.90 or earlier. The vulnerability is rated low severity by Red Hat due to the limited confidentiality impact and documented behavior. Mitigations include restricting leasequery to designated relays, not enabling leasequery if unnecessary, and using firewall rules to limit DHCP packet sources.

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 29 Oct 2026, 13:51 UTC

Technical details

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