CVE-2026-123084VulnerabilityPublished 11 Nov 2026

An expression language injection has been found in the HeaderContentGuard.permit function in publication.py of the

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Authoritative record:CVE-2026-123084· Medium 6.5

Not known to be exploited · CVSS 6.5 Medium.

Data as of 11 Nov 2026, 01:21 UTC

CVSS 3.1 base score

6.5Medium

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	6.5

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

Attack Vector: Network
Attack Complexity: Low
Privileges Required: Low
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: Low: The attacker is authorized with (i.e., requires) privileges that provide basic user capabilities that could normally affect only settings and files owned by a user. Alternatively, an attacker with Low privileges may have the ability to cause an impact only to non-sensitive resources.
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 10 Nov 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 10 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.

ghsa-mxj6-qp96-8hrw

What to do

Affected software

Product	Affected	Fixed in
Red Hat Ansible Automation Platform 2ansible-automation-platform-24/hub-rhel8	Affected–	Fixed in–
Red Hat Ansible Automation Platform 2ansible-automation-platform-25/hub-rhel8	Affected–	Fixed in–
Red Hat Ansible Automation Platform 2ansible-automation-platform-26/hub-rhel9	Affected–	Fixed in–
Red Hat Ansible Automation Platform 2ansible-automation-platform-27/hub-rhel9	Affected–	Fixed in–
Red Hat Ansible Automation Platform 2python3.11-pulpcore	Affected–	Fixed in–
Red Hat Ansible Automation Platform 2python3.12-pulpcore	Affected–	Fixed in–

AI-suggested

Red Hat currently does not have a practical temporary workaround that fully mitigates this issue. The vulnerability requires permissions to create and attach a header content guard, so restricting these permissions can reduce risk. Users should monitor Red Hat advisories for official patches or updates addressing this vulnerability.

Description

An expression language injection vulnerability exists in the HeaderContentGuard.permit function in Pulpcore's publication.py. This flaw allows a low-privileged attacker who can create and attach a header content guard to a distribution to execute a jq filter that can access the environment of the content process. By repeatedly making content requests, the attacker can extract sensitive environment data, including Pulp settings such as the Django secret key and database password. The vulnerability was introduced in Pulpcore 3.39.0 and affects default configurations. Red Hat Satellite and RHUI 5 are not affected. No practical workaround is currently available.

Impact

A low-privileged network attacker or user who can create and attach a header content guard can read the environment of the content service process. This includes sensitive information such as the Django secret key and database password, potentially compromising confidentiality. The vulnerability does not impact integrity or availability. The flaw is exploitable without additional user interaction once the attacker has the required permissions to create and attach the guard. Red Hat Satellite and RHUI 5 are not affected. The impact on Red Hat Ansible Automation Platform 2.6 and 2.7 is lower because secrets are stored outside the environment.

CWE-917Improper Neutralization of Special Elements used in an Expression Language Statement (Expression Language Injection) (opens in a new tab)
Base weaknessOWASP Top 10 A05:2025: Injection (opens in a new tab)
The product constructs all or part of an expression language (EL) statement in a framework such as a Java Server Page (JSP) using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended EL statement before it is executed.
Architecture and Design
Avoid adding user-controlled data into an expression interpreter when possible.
Implementation
If user-controlled data must be added to an expression interpreter, one or more of the following should be performed: Validate that the user input will not evaluate as an expression; Encode the user input in a way that ensures it is not evaluated as an expression
System Configuration · Operation
The framework or tooling might allow the developer to disable or deactivate the processing of EL expressions, such as setting the isELIgnored attribute for a JSP page to "true".
OWASP Cheat Sheets
Abuse Case (opens in a new tab)
Deserialization (opens in a new tab)
Injection Prevention (opens in a new tab)
SQL Injection Prevention (opens in a new tab)
Injection Prevention in Java (opens in a new tab)
OWASP ASVS 4.0.3
V1.5.1 (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 11 Nov 2026, 01:21 UTC

WeaknessesCWE-917

Technical details

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