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Fencer Vulns
high 8.1

CVE-2026-104988 json

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

published 2026-10-02 37 d ago modified 2026-11-04 4 d ago also EUVD-2026-91777

cvss
8.1
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 10%
public exploits
0
none known

Summary

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.

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-104988 updated cvss 8.1

pki-core: dogtag-pki: redhat-pki: pki: EST fullcmc authentication bypass allows certificate mis-issuance with arbitrary subject

  • Red Hat Certificate System 10 redhat-pki Red Hat Certificate System 11 redhat-pki
    affected: workaround, no fix available “Disable basic authentication for all users. This can be done by removing the field "UserPasswords" for the user entries in the EST DS server.”
  • Red Hat Certificate System 9 redhat-pki, pki-core 10.5.18-32.el7pki Red Hat Enterprise Linux 6 pki-ca, pki-util, pki-setup, pki-common, pki-silent, pki-symkey, +7 more Red Hat Enterprise Linux 7 pki-ca, pki-kra, pki-base, pki-tools, pki-server, pki-symkey, +3 more Red Hat Enterprise Linux 8 jss, pki-ca, idm-jss, ldapjdk, pki-kra, pki-acme, +25 more Red Hat Enterprise Linux 9 pki-ca, pki-kra, pki-acme, pki-base, pki-tools, idm-pki-ca, +13 more
    not affected: vulnerable code not present
  • Red Hat Enterprise Linux 10 dogtag-pki
    not affected: vulnerable code not in execute path

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
34 d ago

Exploit prediction

0.20% chance of exploitation in the next 30 days, higher than 10% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 8.1 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

Affected products

  • Red Hat Red Hat Certificate System 10
  • Red Hat Red Hat Certificate System 11
  • Red Hat Red Hat Certificate System 9
  • Red Hat Red Hat Enterprise Linux 10
  • Red Hat Red Hat Enterprise Linux 6
  • Red Hat Red Hat Enterprise Linux 7
  • Red Hat Red Hat Enterprise Linux 8
  • Red Hat Red Hat Enterprise Linux 9

Classification

Weakness
  • CWE-290 Authentication Bypass by Spoofing

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.