VulnerabilityPublished 18 Sep 2026Updated 15 Oct 2026

CVE-2026-93564: Red Hat Build of Apache Camel 3.33.3.SP2 · CWE-1035

Affects Red Hat Build of Apache Camel 3.33.3.SP2Source CVE Database V5

Compare

Not known to be exploited · CVSS 7.5 High.

Data as of 2 Nov 2026, 22:58 UTC

CVSS 3.1 base score

7.5High

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

EPSS: 0.9% chance of exploitation in 30 days – higher than 60% 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:N/I:N/A:H

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

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: None: There is no loss of confidentiality within the impacted component.
Integrity: None: There is no loss of integrity within the impacted component.
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).

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 HatRed Hat Build of Apache Camel 3.33.3.SP2	Affected–	Fixed in–
Red HatRed Hat Build of Debezium 3.6	Affected–	Fixed in–
Red HatRed Hat build of Quarkus 3.27.5.SP2	Affected–	Fixed in–
Red HatRed Hat build of Quarkus 3.33.3.SP2	Affected–	Fixed in–
Red HatRed Hat AMQ Broker 7	Affected–	Fixed in–
Red HatRed Hat build of Apache Camel 4 for Quarkus 3	Affected–	Fixed in–

AI-suggested

Red Hat has released an official security update that addresses this vulnerability as part of the Red Hat build of Quarkus 3.27.5.SP2 update. Users should apply this update to remediate the issue. Before applying this update, ensure all previously released errata relevant to your system have been applied. Refer to the Red Hat advisory RHSA-2026:69470 for detailed update instructions. No alternative mitigations or workarounds are specified in the advisory.

Description

CVE-2026-93564 is a high-severity vulnerability in the Netty component used by Red Hat Build of Apache Camel 3.33.3.SP2. It involves a reference-count leak in the HAProxy PROXY-v2 message decoder that allows a remote, unauthenticated attacker to send specially crafted PROXY-protocol v2 headers. This flaw can cause memory exhaustion leading to a denial of service (DoS) condition. Red Hat has issued an advisory referencing this issue as part of a broader security update for Red Hat build of Quarkus 3.27.5.SP2. The advisory indicates that a security update is available to address this and other vulnerabilities.

Impact

Successful exploitation of this vulnerability can lead to memory exhaustion on the affected system, causing a denial of service. There is no impact on confidentiality or integrity reported. The attack can be performed remotely without authentication, increasing the risk of disruption to services relying on the affected Netty component.

Summary

The vulnerability CVE-2026-93564 exists in the Netty library's HAProxy PROXY-v2 message decoder, where a reference-count leak occurs when processing nested-TLV grandchild ByteBufs. This flaw allows a remote attacker, without authentication, to send maliciously crafted PROXY-protocol v2 headers that cause memory exhaustion, resulting in denial of service. The issue is noted as an incomplete fix of a prior pull request (#16881). Red Hat has included this fix in their security update for Red Hat build of Quarkus 3.27.5.SP2, which addresses multiple CVEs including this one. The CVSS v3.1 score is 7.5 (high severity), reflecting network attack vector, low attack complexity, no privileges or user interaction required, and impact limited to availability (denial of service).

CWE-1035OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities (opens in a new tab)
CategoryOWASP Top 10 A03:2025: Software Supply Chain Failures (opens in a new tab)
Weaknesses in this category are related to the A9 category in the OWASP Top Ten 2017.
MITRE does not allow mapping vulnerabilities to this entry; it groups weaknesses rather than naming one.
OWASP Cheat Sheets
OWASP Cheat Sheet Series: Dependency Graph SBOM (opens in a new tab)
OWASP Cheat Sheet Series: Vulnerable Dependency Management (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

References

Community reviews

Loading reviews…

Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 17 Oct 2026, 20:17 UTC

WeaknessesCWE-1035

Technical details

References

Community reviews

Related threats