compression is a Node.js and Express compression middleware. In versions before 1.8.2, when a client aborts the connection while a compressed response is still being sent, the zlib stream created to compress that response is never destroyed, so each aborted compressed response leaks its native zlib memory. A remote unauthenticated attacker can repeatedly open requests and disconnect early, exhausting the available memory and crashing the server. All applications using compression are affected. The issue is fixed in compression 1.8.2, and users should upgrade to 1.8.2 or later.

The remote Redhat Enterprise Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:87004 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-gateway: authorization bypass via workload identity token forgery (CVE-2026-94416)
    * automation-platform-ui: proxy-addr vulnerable to IP spoofing via IPv4-mapped IPv6 trust subnet     (CVE-2026-90711)
    * automation-platform-ui: compression: Denial of Service via memory leak on premature response close     (CVE-2026-87776)
    * automation-platform-ui: fflate: Denial of Service via crafted ZIP archives (CVE-2026-45820)
    * python3.12-pulpcore: file:// scheme allowlist bypass in content upload file_url field enables arbitrary     file read and Pulp Container registry signing key theft (CVE-2026-90959)
    * python3.12-pyjwt: Verification key substitution via unvalidated JWKS redirects (CVE-2026-102267)
    * python3.12-pyjwt: Token forgery via improper Unicode byte-order mark handling (CVE-2026-102272)
    * python3.12-pyjwt: Authentication bypass via empty HMAC key acceptance (CVE-2026-102266)
    * python3.12-pyjwt: Authentication bypass via acceptance of DER public keys as HMAC secrets     (CVE-2026-102271)
    * python3.12-pyjwt: Token forgery via acceptance of public JWK containers as HMAC secrets     (CVE-2026-102273)

    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.

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - compression is a Node.js and Express compression middleware. In versions before 1.8.2, when a client
    aborts the connection while a compressed response is still being sent, the zlib stream created to compress
    that response is never destroyed, so each aborted compressed response leaks its native zlib memory. A
    remote unauthenticated attacker can repeatedly open requests and disconnect early, exhausting the
    available memory and crashing the server. All applications using compression are affected. The issue is
    fixed in compression 1.8.2, and users should upgrade to 1.8.2 or later. (CVE-2026-87776)

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

  - compression is a Node.js and Express compression middleware. In versions before 1.8.2, when a client     aborts the connection while a compressed response is still being sent, the zlib stream created to compress     that response is never destroyed, so each aborted compressed response leaks its native zlib memory. A     remote unauthenticated attacker can repeatedly open requests and disconnect early, exhausting the     available memory and crashing the server. All applications using compression are affected. The issue is     fixed in compression 1.8.2, and users should upgrade to 1.8.2 or later. (CVE-2026-87776)

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

ID	Name	Product	Family	Type	Severity
370142	RHEL 9 : Red Hat Ansible Automation Platform 2.6 Product Security and Bug Fix Update (Important) (RHSA-2026:87004)	Nessus	Red Hat Local Security Checks	Local	high
473568	Echo: compression: security update to 1.8.2	Tenable Cloud Security	Echo Local Security Checks	Local	high
473568	Echo: compression: security update to 1.8.2	Tenable Self-Hosted Container Security	Echo Local Security Checks	Local	high
472958	SCA: security update for compression (GHSA-vc2v-76pw-4v95)	Tenable Cloud Security	SCA Checks	Local	high
472958	SCA: security update for compression (GHSA-vc2v-76pw-4v95)	Tenable Self-Hosted Container Security	SCA Checks	Local	high
344814	Linux Distros Unpatched Vulnerability : CVE-2026-87776	Nessus	Misc.	Local	high

Detections

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CVE-2026-87776

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Tenable Plugins

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high