Impact: A bad regular expression is generated any time you have multiple sequential optional groups (curly brace syntax), such as `{a}{b}{c}:z`. The generated regex grows exponentially with the number of groups, causing denial of service. Patches: Fixed in version 8.4.0. Workarounds: Limit the number of sequential optional groups in route patterns. Avoid passing user-controlled input as route patterns.

The remote Redhat Enterprise Linux 8 / 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:24761 advisory.

    Red Hat Ansible Automation Platform provides an enterprise framework for building, deploying and managing     IT automation at scale. IT Managers can provide top-down guidelines on how automation is applied to     individual teams, while automation developers retain the freedom to write tasks that leverage existing     knowledge without the overhead. Ansible Automation Platform makes it possible for users across an     organization to share, vet, and manage automation content by means of a simple, powerful, and agentless     language.

    Security Fix(es):
    * automation-controller: Cryptography: Buffer overflow via non-contiguous buffer in API (CVE-2026-39892)
    * automation-controller: pyasn1 Vulnerable to Denial of Service via Unbounded Recursion (CVE-2026-30922)
    * automation-gateway: Axios: Server-Side Request Forgery and proxy bypass due to improper hostname     normalization (CVE-2025-62718)
    * automation-gateway: Vite: Information disclosure via WebSocket connection bypasses access control     (CVE-2026-39363)
    * automation-gateway: node-forge: Denial of Service via infinite loop in BigInteger.modInverse()     (CVE-2026-33891)
    * automation-gateway: Forge: Signature Forgery via Weak RSASSA PKCS#1 v1.5 Verification (CVE-2026-33894)
    * automation-gateway: Forge: Authentication bypass via forged Ed25519 cryptographic signatures     (CVE-2026-33895)
    * automation-gateway: Forge (node-forge): Certificate validation bypass allows unauthorized certificate     issuance (CVE-2026-33896)
    * automation-gateway: path-to-regexp: Denial of Service via crafted regular expressions (CVE-2026-4926)
    * automation-gateway: Minimatch: Denial of Service via catastrophic backtracking in glob expressions     (CVE-2026-27904)
    * automation-gateway: minimatch: Denial of Service via specially crafted glob patterns (CVE-2026-26996)
    * automation-gateway-proxy: Go crypto/tls: Denial of Service via multiple TLS 1.3 key update messages     (CVE-2026-32283)
    * automation-gateway-proxy: Go: Denial of Service vulnerability in certificate chain building     (CVE-2026-32280)
    * python3.12-click: Arbitrary command execution via command injection in click.edit() (CVE-2026-7246)
    * python3.12-cryptography: Buffer overflow via non-contiguous buffer in API (CVE-2026-39892)
    * python3.12-pillow: Denial of Service via decompression bomb in FITS image processing (CVE-2026-40192)
    * receptor: Go crypto/tls: Denial of Service via multiple TLS 1.3 key update messages (CVE-2026-32283)
    * receptor: Go: Denial of Service vulnerability in certificate chain building (CVE-2026-32280)
    * receptor: Root.Chmod can follow symlinks out of the root (CVE-2026-32282)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

    For details about this release, refer to the release notes listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Redhat Enterprise Linux 10 / 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:24762 advisory.

    Red Hat Ansible Automation Platform provides an enterprise framework for building, deploying and managing     IT automation at scale. IT Managers can provide top-down guidelines on how automation is applied to     individual teams, while automation developers retain the freedom to write tasks that leverage existing     knowledge without the overhead. Ansible Automation Platform makes it possible for users across an     organization to share, vet, and manage automation content by means of a simple, powerful, and agentless     language.

    Security Fix(es):

    * automation-controller: Cryptography: Buffer overflow via non-contiguous buffer in API (CVE-2026-39892)
    * automation-controller: pyasn1 Vulnerable to Denial of Service via Unbounded Recursion (CVE-2026-30922)
    * automation-gateway-proxy: Go crypto/tls: Denial of Service via multiple TLS 1.3 key update messages     (CVE-2026-32283)
    * automation-gateway-proxy: Go: Denial of Service vulnerability in certificate chain building     (CVE-2026-32280)
    * automation-platform-ui: Vite: Information disclosure via WebSocket connection bypasses access control     (CVE-2026-39363)
    * automation-platform-ui: lodash: Arbitrary code execution via untrusted input in template imports     (CVE-2026-4800)
    * automation-platform-ui: node-forge: Denial of Service via infinite loop in BigInteger.modInverse()     (CVE-2026-33891)
    * automation-platform-ui: path-to-regexp: Denial of Service via crafted regular expressions     (CVE-2026-4926)
    * automation-platform-ui: Axios: Remote Code Execution via Prototype Pollution escalation (CVE-2026-40175)
    * python-click/python3.12-click: Pallets Click: Arbitrary command execution via command injection in     click.edit() (CVE-2026-7246)
    * python3.12-cryptography: Buffer overflow via non-contiguous buffer in API (CVE-2026-39892)
    * python3.12-pillow: Denial of Service via decompression bomb in FITS image processing (CVE-2026-40192)
    * receptor: Go crypto/tls: Denial of Service via multiple TLS 1.3 key update messages (CVE-2026-32283)
    * receptor: Go: Denial of Service vulnerability in certificate chain building (CVE-2026-32280)
    * receptor: Root.Chmod can follow symlinks out of the root (CVE-2026-32282)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

    For details about this release, refer to the release notes listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - Impact: A bad regular expression is generated any time you have multiple sequential optional groups (curly     brace syntax), such as `{a}{b}{c}:z`. The generated regex grows exponentially with the number of groups,     causing denial of service. Patches: Fixed in version 8.4.0. Workarounds: Limit the number of sequential     optional groups in route patterns. Avoid passing user-controlled input as route patterns. (CVE-2026-4926)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Severity
320178	RHEL 8 / 9 : Red Hat Ansible Automation Platform 2.5 Product Security and Bug Fix Update (Important) (RHSA-2026:24761)	Nessus	Red Hat Local Security Checks	high
320174	RHEL 10 / 9 : Red Hat Ansible Automation Platform 2.6 Product Security and Bug Fix Update (Important) (RHSA-2026:24762)	Nessus	Red Hat Local Security Checks	high
303925	Linux Distros Unpatched Vulnerability : CVE-2026-4926	Nessus	Misc.	high

Detections

Analytics

CVE-2026-4926

high

Tenable Plugins

high

high

high