Red Hat Ansible Automation Platform 2.6 for…: Improper Verification of Cryptographic Signature
CVE-2026-42784 is a high-severity improper verification of cryptographic signature vulnerability in Red Hat Ansible Automation Platform 2.6 for RHEL 9 from Red Hat, with a CVSS 3.1 base score of 7.4 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, but only if a user takes part, for example by opening a link or file. There is no confirmed exploitation so far. EPSS estimates a 0.35% chance of exploitation within 30 days, which is low compared with other CVEs.
High severity with no evidence of exploitation so far.
What to do
- Check which version of Red Hat Ansible Automation Platform 2.6 for RHEL 9 you run against the affected versions below, and install the vendor's latest release.
- Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.
- Because the attack needs a user to take part, warn users about unexpected links and files related to this product until it is patched.
Affected products and versions
Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- NetworkCan be exploited remotely over a network, including the internet.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- NoneNo account or login is needed.
- User interaction
- RequiredA user must take an action such as opening a file or link.
- Scope
- ChangedThe attack can reach beyond the vulnerable component into other systems.
- Confidentiality
- NoneNo data is disclosed.
- Integrity
- HighData or code can be modified at will.
- Availability
- NoneAvailability is not affected.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:H/A:N. Scored by CNA (redhat.com).
Official description
A flaw was found in sequoia-openpgp. The library incorrectly infers key flags for older certificates when a key flags subpacket is missing, leading to a discrepancy in how key capabilities are viewed. This key flag confusion allows an attacker to bypass the back-signature check. Consequently, an attacker can illegitimately bind an arbitrary subkey to their own certificate and forge signatures, completely compromising cryptographic integrity.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Improper Verification of Cryptographic Signature
The product does not verify, or incorrectly verifies, the cryptographic signature for data.
More Improper Verification of Cryptographic Signature vulnerabilities (CWE-347)
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: partial).
- Record last changed materially (score, affected products, status or references).
References
Other references
- access.redhat.com/errata/RHSA-2026:100120
- access.redhat.com/errata/RHSA-2026:34160
- access.redhat.com/errata/RHSA-2026:42078
- access.redhat.com/errata/RHSA-2026:42902
- access.redhat.com/errata/RHSA-2026:76733
- access.redhat.com/errata/RHSA-2026:76734
- access.redhat.com/errata/RHSA-2026:76735
- access.redhat.com/errata/RHSA-2026:76737
- access.redhat.com/errata/RHSA-2026:79357
- access.redhat.com/errata/RHSA-2026:94791
- access.redhat.com/errata/RHSA-2026:98248
- access.redhat.com/errata/RHSA-2026:99949
- access.redhat.com/errata/RHSA-2026:99950
- access.redhat.com/errata/RHSA-2026:99952
- access.redhat.com/security/cve/CVE-2026-42784
Other vulnerabilities in Red Hat Ansible Automation Platform 2.6 for RHEL 9
- 8.1 High severity
- 9.9 Critical severity
- 7.1 High severity
- 7.6 High severity
- 8.7 High severity
- 8.7 High severity
Recent Improper Verification of Cryptographic Signature vulnerabilities
- 7.3 High severity
- 7.7 High severity
- 7.1 High severity
- 7.7 High severity
- 9.1 Critical severity
- 8.3 High severity
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