CVE-2026-22696Network attack vector

Attestation bypass via unsigned QE Identity collateral

Published Jan 26, 2026 · Updated Jan 26, 2026

Cryptographic verification failure in Phala dcap-qvl before 0.3.9 allows remote attackers to make forged SGX or TDX quotes appear valid. The verifier accepts QE Identity collateral from PCCS without validating its signature chain or matching MRSIGNER, ISVPRODID, and ISVSVN to the QE Report. Exploitation requires a deployment to verify attacker-controlled collateral and quotes, allowing a malicious or non-Intel Quoting Enclave to impersonate trusted hardware.

CVSS severity9.3
Critical
EPSS probability0.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cryptographic verification failure in Phala dcap-qvl before 0.3.9 allows remote attackers to make forged SGX or TDX quotes appear valid. The verifier accepts QE Identity collateral from PCCS without validating its signature chain or matching MRSIGNER, ISVPRODID, and ISVSVN to the QE Report. Exploitation requires a deployment to verify attacker-controlled collateral and quotes, allowing a malicious or non-Intel Quoting Enclave to impersonate trusted hardware.

The record

CVE
CVE-2026-22696
Published
Jan 26, 2026
Updated
Jan 26, 2026
Vendor
Phala
Product
dcap-qvl
Classifications
CWE-295, CWE-347, T1553
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 26, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 26, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 0.3.9

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Phala · dcap-qvlversion=< 0.3.9

Published CVSS scores

9.1GitLab Advisory DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
9.3GitHubCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-295Improper Certificate Validation
CWE-347Improper Verification of Cryptographic Signature
T1553Subvert Trust Controls

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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