9.3

CVSS Score

4.0

-

CVSS Score

Basic Information

Concerned about an active attack path?

Talk to our security experts and see Miggo in action.

Miggo Vulnerability Database

→

CVE-2026-22696

CVE-2026-22696: dcap-qvl has Missing Verification for QE Identity

dcap-qvl implements the quote verification logic for DCAP (Data Center Attestation Primitives). A vulnerability present in versions prior to 0.3.9 involves a critical gap in the cryptographic verification process within the dcap-qvl. The library fetches QE Identity collateral (including qe_identity, qe_identity_signature, and qe_identity_issuer_chain) from the PCCS. However, it skips to verify the QE Identity signature against its certificate chain and does not enforce policy constraints on the QE Report. An attacker can forge the QE Identity data to whitelist a malicious or non-Intel Quoting Enclave. This allows the attacker to forge the QE and sign untrusted quotes that the verifier will accept as valid. Effectively, this bypasses the entire remote attestation security model, as the verifier can no longer trust the entity responsible for signing the quotes. All deployments utilizing the dcap-qvl library for SGX or TDX quote verification are affected. The vulnerability has been patched in dcap-qvl version 0.3.9. The fix implements the missing cryptographic verification for the QE Identity signature and enforces the required checks for MRSIGNER, ISVPRODID, and ISVSVN against the QE Report. Users of the @phala/dcap-qvl-node and @phala/dcap-qvl-web packages should switch to the pure JavaScript implementation, @phala/dcap-qvl. There are no known workarounds for this vulnerability. Users must upgrade to the patched version to ensure that QE Identity collateral is properly verified.

(GitHub Advisory)

Miggo Vulnerability Database

→

CVE-2026-22696

CVE-2026-22696:

9.3

CVSS Score

4.0

-

CVSS Score

Basic Information

Is this CVE running in your environment?

Easily map the attack path and prioritize which CVEs are a threat to your organization

Validate Exposure

Technical Details

Package Name	Ecosystem	Vulnerable Versions	First Patched Version
dcap-qvl	rust	< 0.3.9	0.3.9
@phala/dcap-qvl	npm	<= 0.3.0	0.3.9
@phala/dcap-qvl-web	npm	<= 0.3.3
@phala/dcap-qvl-node	npm	<= 0.3.3
dcap-qvl	pip	< 0.3.9	0.3.9

Technical Details

Vulnerability Intelligence
Miggo AI

Root Cause Analysis

The vulnerability lies in the dcap-qvl library's failure to properly verify the Quoting Enclave (QE) Identity, which is a critical component in the remote attestation process. The root cause is twofold: the library skipped the cryptographic signature verification of the QE Identity against its certificate chain, and it failed to enforce policy constraints on the QE Report, such as checking if the QE was in debug mode.

This allowed an attacker to forge a QE Identity and use it to sign untrusted quotes, which the verifier would then accept as legitimate. This effectively bypasses the security guarantees of SGX/TDX remote attestation.

The analysis of the patch commits reveals that the fix involves multiple changes. In the main Rust library, the verify_qe_identity_policy function was updated to validate the QE report's attributes, specifically to prevent the use of a debug-mode QE. The underlying cryptographic library for signature verification was also switched from ring to rustcrypto, indicating a fix in the verify_qe_identity_signature function. The main verify_impl function, which orchestrates the entire process, was therefore vulnerable due to these missing checks.

Similar fixes were applied to the JavaScript implementation, where verifyQeIdentityPolicy was updated to validate the QE report and verifyCertificateChain was hardened to prevent the misuse of CA certificates.

Vulnerable functions

dcap_qvl::verify::verify_impl

src/verify.rs

This is the main quote verification function. Prior to the patch, it did not correctly and completely verify the Quoting Enclave (QE) Identity. It either skipped or improperly performed signature verification and policy enforcement for the QE identity, allowing a forged identity to be accepted as valid. The vulnerability is a result of the incomplete implementation within this function's logic.

dcap_qvl::verify::verify_qe_identity_policy

Vulnerability Intelligence
Miggo AI

Unlock WAF rules for this CVE

Generate vendor-ready rules for the observed attack patterns, plus reasoning and safe deployment guidance

Get WAF rules

WAF Protection Rules

WAF Rule

W** rul*s *v*il**l* *or Mi**o *ustom*rs only.W** rul*s *v*il**l* *or Mi**o *ustom*rs only.W** rul*s *v*il**l* *or Mi**o *ustom*rs only.W** rul*s *v*il**l* *or Mi**o *ustom*rs only.W** rul*s *v*il**l* *or Mi**o *ustom*rs only.W** rul*s *v*il**l* *or Mi**o *ustom*rs only.W** rul*s *v*il**l* *or Mi**o *ustom*rs only.W** rul*s *v*il**l* *or Mi**o *ustom*rs only.W** rul*s *v*il**l* *or Mi**o *ustom*rs only.W** rul*s *v*il**l* *or Mi**o *ustom*rs only.

Reasoning

*v*il**l* *or Mi**o *ustom*rs only.*v*il**l* *or Mi**o *ustom*rs only.*v*il**l* *or Mi**o *ustom*rs only.*v*il**l* *or Mi**o *ustom*rs only.*v*il**l* *or Mi**o *ustom*rs only.*v*il**l* *or Mi**o *ustom*rs only.*v*il**l* *or Mi**o *ustom*rs only.*v*il**l* *or Mi**o *ustom*rs only.*v*il**l* *or Mi**o *ustom*rs only.*v*il**l* *or Mi**o *ustom*rs only.