# CVE-2026-104988: Pki-core: dogtag-pki: redhat-pki: pki: est fullcmc authentication bypass allows certificate mis-issuance with arbitrary subject

Status: published. Published: 2026-10-02. Updated: 2026-11-04.

A flaw was found in Dogtag PKI (pki-core). The CMCAuthForEST authentication plugin fails open when an EST fullcmc enrollment request is submitted via BasicAuth without an end-user TLS client certificate. The SSL_CLIENT_CERT session attribute retains the EST subsystem's agent certificate, which causes downstream authorization checks to treat the request as agent-privileged. An authenticated EST user can exploit this to obtain CA-signed certificates with arbitrary subject names.

## Remediation

- workaround: Disable basic authentication for all users. This can be done by removing the field "UserPasswords" for the user entries in the EST DS server. (source: CNA: redhat)

## Affected products and versions

- Red Hat / Red Hat Certificate System 10 (redhat-pki:10/redhat-pki): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Certificate System 11 (redhat-pki): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Certificate System 9 (pki-core): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Certificate System 9 (redhat-pki): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 10 (dogtag-pki): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 6 (pki-core): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 7 (pki-core): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 8 (pki-core:10.6/pki-core): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 9 (pki-core): Version range not reported. Source: CNA: redhat

## Severity and prioritization

- CVSS 3.1: 8.1 (high); CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N; source: CNA: redhat

- CVSS 3.1: 8.1 (high); CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N; source: NVD: secalert@redhat.com

- CISA KEV: No listing in collected sources

- EPSS: 0.20% as of 2026-11-04; percentile 10.46%

- SSVC: exploitation none; automatable no; technical impact total; source ADP: CISA-ADP

- Weaknesses: CWE-290

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://access.redhat.com/security/cve/CVE-2026-104988 (CNA: redhat; vdb-entry, x_refsource_REDHAT)

- https://bugzilla.redhat.com/show_bug.cgi?id=2545316 (CNA: redhat; issue-tracking, x_refsource_REDHAT)

- https://access.redhat.com/security/cve/CVE-2026-104988 (secalert@redhat.com)

- https://bugzilla.redhat.com/show_bug.cgi?id=2545316 (secalert@redhat.com)

## Provenance

- CNA: redhat: https://www.cve.org/CVERecord?id=CVE-2026-104988; retrieved 2026-11-04; source updated 2026-11-04

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-104988; retrieved 2026-11-05; source updated 2026-11-04

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-104988; retrieved 2026-11-04; source updated Not reported

Revision: df9365ae6e289d27e41efe24f7ded914d8fe3998810cc1859fe0b260b69d55a2

Canonical: https://y2.dev/cve/CVE-2026-104988

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