SleeperGem Uses Three Malicious RubyGems Packages to Target Developer Machines

Cybersecurity researchers have flagged a new software supply chain attack codenamed SleeperGem targeting the Ruby ecosystem after three malicious gems were published to RubyGems with the end goal of serving additional payloads. The rogue gems are listed below - gitcredentialmanager versions 2.8.0...

Malicious code in zzzltestfoobarxyz (RubyGems)

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MAL-2026-10005 Malicious code in zzzltestfoobarxyz (RubyGems)

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Malicious code in zzwandtemp1778552518 (RubyGems)

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MAL-2026-10003 Malicious code in zzwandtemp1778552518 (RubyGems)

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MAL-2026-10004 Malicious code in zzwmgweb02 (RubyGems)

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Malicious code in zzwmgweb02 (RubyGems)

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MAL-2026-10002 Malicious code in zzwandsxabc119 (RubyGems)

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Malicious code in zztxtwtmp13 (RubyGems)

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MAL-2026-10001 Malicious code in zztxtwtmp14 (RubyGems)

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Malicious code in zztxtwtmp14 (RubyGems)

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Malicious code in zztxtwtmp12 (RubyGems)

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Malicious code in zztxtwtmp11 (RubyGems)

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Malicious code in zztxtwtmp10 (RubyGems)

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MAL-2026-9995 Malicious code in zztxtwtmp08 (RubyGems)

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Malicious code in zztxtwtmp09 (RubyGems)

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Malicious code in zztxtwtmp07 (RubyGems)

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MAL-2026-9993 Malicious code in zztxtwtmp06 (RubyGems)

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MAL-2026-9994 Malicious code in zztxtwtmp07 (RubyGems)

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MAL-2026-9992 Malicious code in zztxtwtmp05 (RubyGems)

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