VulnerabilityPublished 18 Sep 2026Updated 29 Oct 2026

CVE-2026-87743: Red Hat OpenShift Dev Spaces 3.31 · Incorrect Behavior Order: Authorization Before Parsing and Canonicalization

Affects Red Hat OpenShift Dev Spaces 3.31Source CVE Database V5

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Not known to be exploited · CVSS 7.5 High.

Data as of 2 Nov 2026, 11:12 UTC

CVSS 3.1 base score

7.5High

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	7.5

EPSS: 0.5% chance of exploitation in 30 days – higher than 44% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

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 18 Sep 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 2 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

Affected software

Product	Affected	Fixed in
Red Hat build of Quarkus 3.27.5.SP2quarkus-vertx-http	Affected–	Fixed in–
Red Hat build of Quarkus 3.33.3.SP2quarkus-vertx-http	Affected–	Fixed in–
Red Hat OpenShift Dev Spaces 3.31devspaces/multicluster-redirector-rhel9	Affected–	Fixed in–
Exploit Intelligenceexploit-intelligence/agent-client-rhel9	Affected–	Fixed in–
OpenShift Serverlessopenshift-serverless-1/kn-eventing-integrations-aws-ddb-streams-source-rhel9	Affected–	Fixed in–
OpenShift Serverlessopenshift-serverless-1/kn-eventing-integrations-aws-s3-sink-rhel9	Affected–	Fixed in–

AI-suggested

Currently, no mitigation is available that meets Red Hat Product Security criteria for ease of use, deployment, applicability, or stability. Users should monitor Red Hat advisories for updates and patches addressing this issue.

Description

CVE-2026-87743 is a vulnerability in Quarkus HTTP security affecting Red Hat OpenShift Dev Spaces 3.31. It involves a discrepancy in path normalization between the security matcher and HTTP request dispatchers, allowing an unauthenticated attacker to bypass authorization checks. This flaw can lead to unauthorized access to protected endpoints and sensitive information. No patch or mitigation meeting Red Hat's criteria is currently available.

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 29 Oct 2026, 18:54 UTC

Technical details

References

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