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CVE Record

CVE-2026-42784: Sequoia-openpgp: sequoia-openpgp: cryptographic integrity compromise via key flag confusion

A flaw was found in sequoia-openpgp. The library incorrectly infers key flags for older certificates when a key flags subpacket is missing, leading to a discrepancy in how key capabilities are viewed. This key flag confusion allows an attacker to bypass the back-signature check. Consequently, an attacker can illegitimately bind an arbitrary subkey to their own certificate and forge signatures, completely compromising cryptographic integrity.

HighCVSS 7.4Not KEV-listedUpdated
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Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

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ATT&CK lookup starting points

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CWE-347: Exact CWE lookup

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Container behavior lookup

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CVE-2026-42784 mapping review

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Vulnerability profileCVE Program record
Severity
High
CVSS
7.4 (3.1)
Known Exploited
No
Published

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

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.

1CVSS vectors
5Timeline events
1ADP providers
11Source links

SSVC decision data

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

CVSS vector scores

1 official score

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
7.4CVSS 3.1HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:H/A:N2.84redhat

Vulnerability scoring details

Base CVSS 3.1 score

7.4High
CVSS 3.1 vector shape for CVE-2026-42784Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

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

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. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  2. Source timelineredhat

    Reported to Red Hat.

  3. Source timelineredhat

    Made public.

  4. CVE publishedCVE Program

    The CVE record was published.

  5. CVE updatedCVE Program

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

ADP provider summaries

CISA-ADPCISA ADP Vulnrichment
other:ssvc

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
Red HatRed Hat Ansible Automation Platform 2.6 for RHEL 9python3.12-pysequoia, 0:0.1.34-1.el9apaffected
Red HatRed Hat Enterprise Linux 10rust-rpm-sequoia, 0:1.10.2.1-1.el10_2affected
Red HatRed Hat Enterprise Linux 10rust-sequoia-sqv, 0:1.3.0.2-1.el10_2affected
Red HatRed Hat Enterprise Linux 10rust-sequoia-sq, 0:1.4.0.1-2.el10_2affected
Red HatRed Hat Enterprise Linux 9rust-rpm-sequoia, 0:1.10.2.1-1.el9_8affected
Red HatRed Hat Cost Management On-Premise 1costmanagement/costmanagement-ui-rhel10, 1791460851affected
Red HatRed Hat Hardened Imagesrust-podman-sequoia-main, 0.3.2-4.hum1affected
Red HatConfidential Compute Attestationopenshift-sandboxed-containers/osc-monitor-rhel9affected
Red HatConfidential Compute Attestationopenshift-sandboxed-containers/osc-operator-bundleaffected
Red HatConfidential Compute Attestationopenshift-sandboxed-containers/osc-podvm-builder-rhel9affected
Red HatConfidential Compute Attestationopenshift-sandboxed-containers/osc-podvm-payload-rhel9affected
Red HatConfidential Compute Attestationopenshift-sandboxed-containers/osc-rhel9-operatoraffected
Red HatRed Hat Ansible Automation Platform 2ansible-automation-platform-26/hub-rhel9affected
Red HatRed Hat Ansible Automation Platform 2ansible-automation-platform-27/hub-rhel9affected
Red HatRed Hat Enterprise Linux 10rust-podman-sequoiaaffected
Red HatRed Hat Enterprise Linux 10trusteeunaffected
Red HatRed Hat Enterprise Linux 10trustee-guest-componentsaffected
Red HatRed Hat Enterprise Linux 9trustee-guest-componentsaffected
Red HatRed Hat Hardened Imagesrust-rpm-sequoiaaffected
Red HatRed Hat OpenShift Container Platform 4kata-containersaffected
Red HatRed Hat Satellite 6python3.12-pysequoiaaffected
Red HatRed Hat Satellite 6python-pysequoiaaffected
Red HatRed Hat Trusted Profile Analyzerrhtpa/rhtpa-trustification-service-rhel9affected
Red HatRed Hat Trusted Profile Analyzerrhtpa/rhtpa-rhel10affected
Weakness

CWE details

CWE-347

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

CWE-347 · source CWE mapping

Improper Verification of Cryptographic Signature

Improper Verification of Cryptographic Signature represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.

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