Bitbucket Cli— mcp server

Bitbucket Cli — independently scanned and version-tracked by SaferSkills.

by FabianSchurig·MCP Server·github.com/FabianSchurig/bitbucket-cli

Is Bitbucket Cli safe to install?

SaferSkills independently audited Bitbucket Cli (MCP Server) and scored it 45/100 (orange). The audit ran 55 deterministic rules across Security, Supply Chain, Maintenance, Transparency, and Community; it found 10 high-severity and 0 lower-severity findings. The full rule-by-rule trace and per-finding evidence are below. Free, methodology-open.

Score
45/100
●●●●●○○○○○
↑ +0 since first scan (45 → 45)Re-scan~30s
Latest scan
ScannedJun 23, 2026 · 31d ago
Scans run1 over 90 days
Detectors55 checks · 5 categories
Findings0 warnings · 10 high
EngineSaferSkills 2b638c6
View methodology →
SaferSkills installs
This week0
This month0
All time0
CategoryWeightCategory scoreContribution
Securityprompt, exec, net, exfil, eval
35%
0
0.0 pts
Supply chainhash, typosquat, maintainer, lockfile
20%
100
20.0 pts
Maintenancestaleness, pinning, CI
15%
100
15.0 pts
TransparencySKILL.md, perms, README
15%
100
15.0 pts
Communityinstalls, verify, response
15%
100
15.0 pts

Findings & checks · 10 flagged

Securityscore 0 · 10 findings
HIGHLong base64-encoded blob hidden in the skill documentationSS-SKILL-INJECT-B64-PAYLOAD-01 · Prompt injection · schema/deployments-schema.yaml×10
HIGHonce decoded by the agent, an encoded payload has the same impact class as plain-text injection.
Why it matters

A base64 string of 128+ characters appears in a documentation file. Encoded prompt injection hides the hostile instruction in base64 — invisible to keyword filters — and relies on the agent's ability to decode it at runtime. There is no normal authoring reason to embed a multi-hundred-byte base64 blob in skill docs.

The exact value spotted
excerptschema/deployments-schema.yaml· yaml
28values:
29- id: 123
30key: ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDAK/b1cHHDr/TEV1JGQl+WjCwStKG6Bhrv0rFpEsYlyTBm1fz
… (86 chars elided on L30)
31label: mykey
32type: deploy_key
Occurrences
10 occurrences · first at L30, also L77, L91 +7 more
Show all 10 locations
Line
File
L30
schema/deployments-schema.yaml
L77
schema/deployments-schema.yaml
L91
schema/deployments-schema.yaml
L212
schema/deployments-schema.yaml
L245
schema/deployments-schema.yaml
L270
schema/deployments-schema.yaml
L715
schema/deployments-schema.yaml
L753
schema/deployments-schema.yaml
L781
schema/deployments-schema.yaml
L909
schema/deployments-schema.yaml
How to fix
Remove the encoded blob, or decode it and review what it actually contains.
  1. Decode the base64 string and confirm it is not an instruction directed at the agent.
  2. Move any legitimate binary or signature data into a dedicated file (*.sig, SIGNATURES) outside the documentation.
Framework references
OWASPLLM01ATLASAML.T0051
Trace & refs
ruleSS-SKILL-INJECT-B64-PAYLOAD-01sha256f6785c3a7cd53b56rubric 365aacaView on GitHub
Supply chainscore 100 · 0 findings
All supply chain checks passedNo findings in this category for the latest scan.pass
Maintenancescore 100 · 0 findings
All maintenance checks passedNo findings in this category for the latest scan.pass
Transparencyscore 100 · 0 findings
All transparency checks passedNo findings in this category for the latest scan.pass
Communityscore 100 · 0 findings
All community checks passedNo findings in this category for the latest scan.pass
Vendor response · right of reply
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