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CVE Record

CVE-2026-1709: Keylime: keylime: authentication bypass allows unauthorized administrative operations due to missing client-side tls authentication

A flaw was found in Keylime. The Keylime registrar, since version 7.12.0, does not enforce client-side Transport Layer Security (TLS) authentication. This authentication bypass vulnerability allows unauthenticated clients with network access to perform administrative operations, including listing agents, retrieving public Trusted Platform Module (TPM) data, and deleting agents, by connecting without presenting a client certificate.

CriticalCVSS 9.4Not KEV-listedUpdated
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Glexia's TakeAutomated analysiscritical

Security readout for executives and security teams

Plain-English summary

Keylime registrar deployments may accept administrative connections without requiring a client certificate. An attacker who can reach the registrar over the network could delete enrolled agents or read public TPM-related data. This can disrupt attestation operations and weaken trust monitoring for affected RHEL systems.

Executive priority

Treat as urgent where Keylime supports platform trust or compliance controls. The main business risk is unauthorized administrative disruption of attestation coverage, especially if the registrar is reachable beyond a tightly controlled management network.

Technical view

Since Keylime 7.12.0, the registrar fails to enforce client-side TLS authentication. The flaw is an authentication bypass, CWE-322, with CVSS 9.4. Reported impacts include listing agents, retrieving public TPM data, and deleting agents without credentials when network access exists.

Likely exposure

Most relevant to organizations running Keylime registrar on affected Red Hat Enterprise Linux 9, RHEL 10, or RHEL 10.0 EUS keylime packages. Exposure depends on whether the registrar service is reachable from untrusted networks.

Exploitation context

The source bundle does not show CISA KEV listing or active exploitation. Exploitation requires network reachability to the registrar, but no privileges or user interaction are required according to the CVSS vector.

Researcher notes

Do not assume broader product impact beyond the listed Red Hat Keylime packages. The strongest evidence is Red Hat and CVE metadata; no public exploit evidence is provided in the bundle. Validate exposure by service placement and affected package inventory.

Mitigation direction

  • Apply the applicable Red Hat security advisory guidance for affected keylime packages.
  • Restrict network access to Keylime registrar services to trusted management paths.
  • Review registrar exposure until vendor-directed remediation is complete.
  • Monitor Red Hat CVE and errata pages for updated remediation details.

Validation and detection

  • Inventory Keylime registrar deployments and package versions across RHEL 9 and RHEL 10 systems.
  • Confirm whether registrar endpoints are reachable from untrusted networks.
  • Verify client certificate authentication is enforced after remediation.
  • Review logs for unexpected agent listing, TPM data access, or agent deletion activity.
Prepared
Confidence
high
Sources
8

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.

cwe · low confidence lookup

CWE-322: Exact CWE lookup

Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.

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description · low confidence lookup

Credential and access behavior lookup

The CVE wording references authentication or credential exposure, so valid-account and credential-access review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.

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cve · low confidence lookup

CVE-2026-1709 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

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Vulnerability profileCVE Program record
Severity
Critical
CVSS
9.4 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

2CVSS vectors
7Timeline events
2ADP providers
7Source links

SSVC decision data

CISA-ADPCISA Coordinator
Timestamp
Version
2.0.3
Exploitation: noneAutomatable: yesTechnical Impact: partial

CVSS vector scores

2 official scores

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
9.4CVSS 3.1CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H3.95.5redhat
9.4CVSS 3.1CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H3.95.5redhat-SADP

Vulnerability scoring details

Base CVSS 3.1 score

9.4Critical
CVSS 3.1 vector shape for CVE-2026-1709Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. ADP timelineredhat-SADP

    Reported to Red Hat.

  2. Source timelineredhat

    Reported to Red Hat.

  3. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  4. ADP timelineredhat-SADP

    Made public.

  5. Source timelineredhat

    Made public.

  6. CVE publishedCVE Program

    The CVE record was published.

  7. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

ADP provider summaries

CISA-ADPCISA ADP Vulnrichment
other:ssvc
redhat-SADPkeylime: Keylime: Authentication bypass allows unauthorized administrative operations due to missing client-side TLS authentication
other:Red Hat severity ratingcvssV3_1
  • 2026-01-30T00:00:00.000Z: Reported to Red Hat.
  • 2026-02-06T17:45:00.000Z: Made public.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
Red HatRed Hat Enterprise Linux 10keylime, 0:7.12.1-11.el10_1.4affected
Red HatRed Hat Enterprise Linux 10.0 Extended Update Supportkeylime, 0:7.12.1-2.el10_0.5affected
Red HatRed Hat Enterprise Linux 9keylime, 0:7.12.1-11.el9_7.4affected
Weakness

CWE details

CWE-322

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.

CWE-322 · source CWE mapping

Key Exchange without Entity Authentication

Key Exchange without Entity Authentication represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.

Open CWE intelligenceSame-CWE CVEs