VulnerabilityPublished 13 Nov 2026

CVE-2026-18662: Rundeck · In Eclipse Jetty, across various versions of `jetty-security`, and `jetty-eeN-security`, two

Affects rundeckSource GCVE Database

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Authoritative record:CVE-2026-18662· Medium 6.9

Not known to be exploited · CVSS 6.9 Medium : upgrade to 6.0.1-r11 when convenient.

Data as of 13 Nov 2026, 01:27 UTC

CVSS 4.0 base score

6.9Medium

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

EPSS: 0.3% chance of exploitation in 30 days – higher than 33% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in 6.0.1-r11

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

Attack Vector: Network
Attack Complexity: Low
Attack Requirements: None
Privileges Required: None
User Interaction: None
Vulnerable system confidentiality: Low
Vulnerable system integrity: Low
Vulnerable system availability: None
Subsequent system confidentiality: None
Subsequent system integrity: None
Subsequent system availability: None

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

Attack Vector: Network: The vulnerable system is bound to the network stack and the set of possible attackers extends beyond the other options listed below, 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: The attacker must take no measurable action to exploit the vulnerability. The attack requires no target-specific circumvention to exploit the vulnerability. An attacker can expect repeatable success against the vulnerable system.
Attack Requirements: None: The successful attack does not depend on the deployment and execution conditions of the vulnerable system. The attacker can expect to be able to reach the vulnerability and execute the exploit under all or most instances of the vulnerability.
Privileges Required: None: The attacker is unauthorized prior to attack, and therefore does not require any access to settings or files of the vulnerable system to carry out an attack.
User Interaction: None: The vulnerable system can be exploited without interaction from any human user, other than the attacker.
Vulnerable system 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 Vulnerable System.
Vulnerable system integrity: Low: Modification of data is possible, but the attacker does not have control over the consequence of a modification, or the amount of modification is limited. The data modification does not have a direct, serious impact to the Vulnerable System.
Vulnerable system availability: None: There is no impact to availability within the Vulnerable System.
Subsequent system confidentiality: None: There is no loss of confidentiality within the Subsequent System or all confidentiality impact is constrained to the Vulnerable System.
Subsequent system integrity: None: There is no loss of integrity within the Subsequent System or all integrity impact is constrained to the Vulnerable System.
Subsequent system availability: None: There is no impact to availability within the Subsequent System or all availability impact is constrained to the Vulnerable System.

Definitions: FIRST CVSS v4.0 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 15 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 12 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 rundeck to 6.0.1-r11.

Affected software

Product	Affected	Fixed in
CleanStartrundeck`pkg:apk/cleanstart/rundeck`Other threats	Affected <6.0.1-r11	Fixed in 6.0.1-r11

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

AI-suggested

Upgrade Rundeck to version 6.0.1-r11 or later, where this vulnerability has been fixed. Applying this official patch is the recommended remediation. No additional mitigation steps are indicated by the vendor advisory.

Description

CVE-2026-18662 is a security vulnerability in the Rundeck package related to Eclipse Jetty components. The issue arises from improper combination of multiple security constraints that share the same HTTP method omission set but lack URL patterns, violating the Jakarta Servlet Specification. This flaw affects versions of Rundeck prior to 6.0.1-r11. The vulnerability has a medium severity score of 6.9 and does not currently have known exploits in the wild. A patch is available in version 6.0.1-r11.

Impact

If exploited, this vulnerability could result in improper application of security constraints, potentially allowing unauthorized HTTP methods to bypass intended restrictions. This undermines the security posture of applications using affected versions of Rundeck with Eclipse Jetty. However, there are no known active exploits in the wild at this time.

Summary

This vulnerability in Rundeck involves Eclipse Jetty's handling of security constraints in the `jetty-security` and `jetty-eeN-security` modules. Specifically, when two or more security constraints have identical HTTP method omission sets and no URL patterns, they are not merged correctly according to the Jakarta Servlet Specification. This can lead to incorrect enforcement of security policies. The issue affects Rundeck versions before 6.0.1-r11, where the problem has been fixed.

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 13 Nov 2026, 01:26 UTC

Technical details

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