EUVD-2026-78899
GHSA-vg99-gr89-qhw9
Severity by source
AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Primary rating from Vendor (https://github.com/DIRACGrid/DIRAC) · only source for this CVE.
CVSS VectorVendor: https://github.com/DIRACGrid/DIRAC
Lifecycle Timeline
3DescriptionCVE.org
Summary
The second stage pilot (pilot.tar) is downloaded by the initial wrapper script without any verification of the webservers' SSL certificate and the contained script is subsequently executed. The checksum is tested, but the reference checksum file is downloaded over the same unvalidated channel.
Details
The pilot wrapper downloads and executes the main second stage pilot script, but the SSL validation on this connection is explicitly disabled (to match old python < 2.7.9 behaviour): https://github.com/DIRACGrid/DIRAC/blob/integration/src/DIRAC/WorkloadManagementSystem/Utilities/PilotWrapper.py#L292-L296
This means that the second stage pilot code is not verified in any way and could potentially be altered by a man-in-the-middle attack to execute arbitrary code in the pilot context (i.e. with access to the pilot proxy/credentials).
The HTTPS connection should be validated against both the system certificates and $X509_CERT_DIR and fail if neither validate correctly.
Impact
This would require a man-in-the-middle style attack against a grid site's network (i.e. changing the DNS or routing to redirect the pilot's connection); this is likely to be difficult which probably limits the potential impact.
Patched versions:
https://pypi.org/project/DIRAC/8.0.79/ https://pypi.org/project/DIRAC/9.0.22/ https://pypi.org/project/DIRAC/9.1.10/
AnalysisAI
Man-in-the-middle code injection in DIRAC's grid pilot bootstrap affects the DIRACGrid Python distributed-computing framework, where the PilotWrapper explicitly disables TLS certificate validation when fetching the second-stage pilot.tar. Because both the payload and its reference checksum traverse the same unverified HTTPS channel, an attacker positioned on the grid site's network can substitute arbitrary code that runs in the pilot context with access to its proxy/credentials. No public exploit identified at time of analysis; exploitation requires an active network intercept, which the vendor notes is non-trivial, but the CVSS is 8.1 due to full CIA impact.
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Same weakness CWE-295 – Improper Certificate Validation
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External POC / Exploit Code
Leaving vuln.today