VulnerabilityPublished 16 Sep 2026Updated 15 Oct 2026

CVE-2026-42784: Red Hat Ansible Automation Platform 2.6 for RHEL 9 · Improper Verification of Cryptographic Signature

Affects Red Hat Ansible Automation Platform 2.6 for RHEL 9Source CVE Database V5

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Not known to be exploited · CVSS 7.4 High.

Data as of 30 Oct 2026, 20:25 UTC

CVSS 3.1 base score

7.4High

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

EPSS: 0.3% chance of exploitation in 30 days – higher than 24% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

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

Attack Vector: Network
Attack Complexity: Low
Privileges Required: None
User Interaction: Required
Scope: Changed
Confidentiality: None
Integrity: High
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: Required: Successful exploitation of this vulnerability requires a user to take some action before the vulnerability can be exploited.
Scope: Changed: An exploited vulnerability can affect resources beyond the security scope managed by the security authority of the vulnerable component. In this case, the vulnerable component and the impacted component are different and managed by different security authorities.
Confidentiality: None: There is no loss of confidentiality within the impacted component.
Integrity: High: There is a total loss of integrity, or a complete loss of protection. For example, the attacker is able to modify any/all files protected by the impacted component. Alternatively, only some files can be modified, but malicious modification would present a direct, serious consequence to 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 16 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 30 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 Ansible Automation Platform 2.6 for RHEL 9python3.12-pysequoia	Affected–	Fixed in–
Red Hat Enterprise Linux 10rust-rpm-sequoia	Affected–	Fixed in–
Red Hat Enterprise Linux 10rust-sequoia-sqv	Affected–	Fixed in–
Red Hat Enterprise Linux 10rust-sequoia-sq	Affected–	Fixed in–
Red Hat Enterprise Linux 9rust-rpm-sequoia	Affected–	Fixed in–
Red Hat Cost Management On-Premise 1costmanagement/costmanagement-ui-rhel10	Affected–	Fixed in–

AI-suggested

Red Hat has released an official fix in the form of updated RPM packages for rust-podman-sequoia (version 0.3.2-4.hum1). Users of Red Hat Ansible Automation Platform 2.6 for RHEL 9 should apply this update promptly to remediate the vulnerability. Refer to the Red Hat advisory RHSA-2026:42902 for detailed update instructions. No additional mitigation steps are required beyond applying the official patch.

Description

CVE-2026-42784 is a vulnerability in the sequoia-openpgp library used by Red Hat Ansible Automation Platform 2.6 for RHEL 9. The flaw involves improper verification of cryptographic signatures due to incorrect inference of key flags when a key flags subpacket is missing. This allows an attacker to bypass back-signature checks and forge signatures by illegitimately binding arbitrary subkeys to their own certificate, compromising cryptographic integrity.

Impact

The vulnerability allows attackers to bypass cryptographic signature verification, enabling them to forge signatures and bind arbitrary subkeys to their certificates. This compromises the integrity of cryptographic operations relying on sequoia-openpgp, potentially allowing unauthorized actions that depend on signature validation. The impact is limited to integrity; confidentiality and availability are not affected according to the CVSS vector.

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 20 Oct 2026, 21:05 UTC

Technical details

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