dcap-qvl has Missing Verification for QE Identity
Impact
This vulnerability 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.
Consequences
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.
Who is impacted
All deployments utilizing the dcap-qvl library for SGX or TDX quote verification are affected.
Patches
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.
Workarounds
There are no known workarounds for this vulnerability. Users must upgrade to the patched version to ensure that QE Identity collateral is properly verified.
Credit
This bug was reported by Rahul Saxena saxenism@bluethroatlabs.com.
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| npm package | @phala/dcap-qvl | < 0.3.9 | 0.3.9 |
| npm package | @phala/dcap-qvl-node | <= 0.3.3 | no fix |
| npm package | @phala/dcap-qvl-web | <= 0.3.3 | no fix |
| Python (PyPI) | dcap-qvl | < 0.3.9 | 0.3.9 |
References
- CVSS vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N- Weakness (CWE)
CWE-295, CWE-347- Platform
- npm, Python (PyPI)
- Package
@phala/dcap-qvl, @phala/dcap-qvl-node, @phala/dcap-qvl-web- Disclosed
- 26.01.2026
- Updated
- 11.10.2026 12:20
Sources and licenses
OSV / GitHub Advisory Database - GHSA-796p-j2gh-9m2q - CC BY 4.0
OSV / GitHub Advisory Database - PYSEC-2026-326 - PyPA Advisory Database; CC BY 4.0
Vulnerability history: @phala/dcap-qvl
All published vulnerabilities of this package (npm package), newest first. Shows whether this is a one-off slip or a package that needs watching.
This is the only known vulnerability of this package.
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