CVE-2026-26104

MEDIUMPre-NVD 5.55.5—
EchelonGraph scoreMEDIUM confidence

Score 5.5 from GitHub Security Advisory published 2026-02-25. a secondary CVSS source baseline 5.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
5.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.5Exploit: None knownExposed: 0

A fix is available — apply it.

A flaw was found in the udisks storage management daemon that allows unprivileged users to back up LUKS encryption headers without authorization. The issue occurs because a privileged D-Bus method responsible for exporting encryption metadata does not perform a policy check. As a result, sensitive cryptographic metadata can be read and written to attacker-controlled locations. This weakens the confidentiality guarantees of encrypted storage volumes.

CVSS v3
5.5
EG Score
5.5(medium)
EG Risk
25(Track)
EG Risk 25/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity55% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
0%
KEV
Not listed

Published

February 25, 2026

Last Modified

June 17, 2026

Advisory Details (5)

Auto-updated Aug 6, 2026
Patch available. Sources: redhat, github.
github Patch Available

Missing Authorization Check Allows Unprivileged Users to Back Up LUKS Headers via udisks D-Bus API · Advisory · storaged-project/udisks · GitHub

https://github.com/storaged-project/udisks/security/advisories/GHSA-fcvx-497g-6xmw
redhat Patch Available

2433717 – (CVE-2026-26104) CVE-2026-26104 udisks: Missing Authorization Check Allows Unprivileged Users to Back Up LUKS Headers via udisks D-Bus API

Affected: Red Hat Enterprise Linux 10

https://bugzilla.redhat.com/show_bug.cgi?id=2433717
redhat Patch Available

CVE-2026-26104 - Red Hat Customer Portal

Affected: Red Hat Enterprise Linux 8 or OpenShift Container Platform 4, is affected by this vulnerability and a fix may be released to a

https://access.redhat.com/security/cve/CVE-2026-26104
redhat Patch Available

Affected: Red Hat Enterprise Linux 10.0 Extended Update Support.

https://access.redhat.com/errata/RHSA-2026:5831
redhat Patch Available

Affected: Red Hat Enterprise Linux 10.

https://access.redhat.com/errata/RHSA-2026:3476

Vendor Advisories for CVE-2026-26104(2)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(2)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatudisks2-0:2.10.90-5.el10_0.22026-03-25redhat
redhatudisks2-0:2.10.90-6.el10_1.12026-03-02redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(1 across 1 ecosystem)
Debian:14(1)
PackageVulnerable rangeFixed inDependents
udisks22.10.1-12.1 ... 2.11.0-2 (8 versions)2.11.1-1—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 2× in last 7d / 10× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-09-18 19:20 UTCOSV refresh
  2. 2026-09-16 14:07 UTCEPSS rescore
  3. 2026-09-13 16:47 UTCEPSS rescore
  4. 2026-09-11 14:52 UTCEPSS rescore
  5. 2026-09-10 09:34 UTCEPSS rescore
  6. 2026-09-08 22:00 UTCEPSS rescore
  7. 2026-09-04 05:06 UTCEPSS rescore
  8. 2026-08-30 22:47 UTCOSV refresh
  9. 2026-08-30 01:22 UTCEPSS rescore
  10. 2026-08-28 21:41 UTCEPSS rescore
  11. 2026-08-21 23:49 UTCEPSS rescore
  12. 2026-08-20 22:55 UTCEPSS rescore
  13. 2026-08-16 02:14 UTCEPSS rescore
  14. 2026-08-14 09:02 UTCVendor advisory
  15. 2026-08-14 09:01 UTCGHSA enrichment
  16. 2026-08-13 01:02 UTCVendor advisory
  17. 2026-08-13 01:02 UTCGHSA enrichment
  18. 2026-08-11 06:35 UTCVendor advisory
  19. 2026-08-11 06:35 UTCGHSA enrichment
  20. 2026-08-10 08:48 UTCVendor advisory
  21. 2026-08-10 08:48 UTCGHSA enrichment
  22. 2026-08-09 08:40 UTCEG score recompute
  23. 2026-08-09 08:40 UTCVendor advisory
  24. 2026-08-09 08:40 UTCGHSA enrichment
  25. 2026-08-08 16:37 UTCEPSS rescore
Show 19 more
  1. 2026-08-07 20:44 UTCEG score recompute
  2. 2026-08-07 20:44 UTCVendor advisory
  3. 2026-08-07 20:44 UTCGHSA enrichment
  4. 2026-08-06 13:46 UTCEPSS rescore
  5. 2026-08-06 03:02 UTCEG score recompute
  6. 2026-08-06 03:02 UTCVendor advisory
  7. 2026-08-06 03:02 UTCGHSA enrichment
  8. 2026-08-05 19:17 UTCEPSS rescore
  9. 2026-08-04 05:54 UTCVendor advisory
  10. 2026-08-04 05:54 UTCGHSA enrichment
  11. 2026-08-02 19:35 UTCEG score recompute
  12. 2026-08-02 19:35 UTCVendor advisory
  13. 2026-08-02 19:35 UTCGHSA enrichment
  14. 2026-07-30 16:27 UTCEPSS rescore
  15. 2026-07-30 01:30 UTCEPSS rescore
  16. 2026-07-27 12:55 UTCEG score recompute
  17. 2026-07-27 12:55 UTCVendor advisory
  18. 2026-07-27 12:55 UTCGHSA enrichment
  19. 2026-07-27 12:50 UTCOSV refresh

Related CVEs(same vendor + same CWE)

Same vendor

1 shown

redhat:RHSA-2026:3476

Frequently asked(5)

What is CVE-2026-26104?
CVE-2026-26104 is a medium vulnerability published on February 25, 2026. A flaw was found in the udisks storage management daemon that allows unprivileged users to back up LUKS encryption headers without authorization. The issue occurs because a privileged D-Bus method responsible for exporting encryption metadata does not perform a policy check. As a result, sensitive…
When was CVE-2026-26104 disclosed?
CVE-2026-26104 was first published in the National Vulnerability Database on February 25, 2026, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-26104 actively exploited?
CVE-2026-26104 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 99.9% of all scored CVEs.
What is the CVSS score of CVE-2026-26104?
CVE-2026-26104 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2026-26104?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-26104, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-26104

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