GCVE-110-OSM-2026-4950

Advisory PublishedCVSS 8.8/10

Vulnetix · Advisory published May 5, 2026

Malicious GitHub organization impersonating Brazilian financial cooperative Sicoob (distinct from the legitimate github.com/Sicoob created in 2017). Created minutes before the attack to host the fake official SDK source and lend legitimacy to the trojanized NuGet packages. Part of the Sicoob.Sdk NuGet supply-chain campaign that exfiltrates banking mTLS certificates and PFX passwords via Sentry DSN: https://d565e3f03d0b1a7c8935d7ff94237316@o4511335034847232.ingest.de.sentry.io/4511337546317904

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Weaknesses (CWE)

CWE-506Embedded Malicious Code

Risk Scores

CVSS 3.1

8.8/10

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

Affected Products

Vendor	Product	Versions	Platforms
unknown		all (affected)	—

References

Malicious package:

advisory

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