Emissary Use of a Broken or Risky Cryptographic Algorithm
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- None · High · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-327.
Summary
Emissary is a P2P based data-driven workflow engine. The ChecksumCalculator class within allows for hashing and checksum generation, but it includes or defaults to algorithms that are no longer recommended for secure cryptographic use cases (e.g., SHA-1, CRC32, and SSDEEP). These algorithms, while possibly valid for certain non-security-critical tasks, can expose users to security risks if used in scenarios where strong cryptographic guarantees are required. This issue is fixed in 8.24.0.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| NationalSecurityAgency | emissary | before 8.24.0 | 8.24.0 | Patch available | CNA |
| — | gov.nsa.emissary:emissary (Maven) | before 8.24.0 | 8.24.0 | Patch available | GHSA-hw43-fcmm-3m5g |
- emissary VendorNationalSecurityAgency Affected before 8.24.0 Fixed in 8.24.0 Patch available CNA
- gov.nsa.emissary:emissary (Maven) Vendor— Affected before 8.24.0 Fixed in 8.24.0 Patch available GHSA-hw43-fcmm-3m5g
CPE names Threatist (inferred) · 1
Inferred from how NVD named this product before; not given by a source.
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:nsa:emissary:*:*:*:*:*:*:*:* | — | — | NationalSecurityAgency |
- cpe:2.3:a:nsa:emissary:*:*:*:*:*:*:*:* Versions — — ·NationalSecurityAgency
Remediation
- Fix · CNA emissary (NationalSecurityAgency) Fixed in 8.24.0
- Fix · GHSA-hw43-fcmm-3m5g gov.nsa.emissary:emissary (Maven) Fixed in 8.24.0 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2025-27508
- 2026-10-03 Alias added: GHSA-hw43-fcmm-3m5g
References
Other 4
- https://github.com/NationalSecurityAgency/emissary/security/advisories/GHSA-hw43-fcmm-3m5g
- https://github.com/NationalSecurityAgency/emissary/commit/da3a81a8977577597ff2a944820a5ae4e9762368
- https://github.com/NationalSecurityAgency/emissary
- https://github.com/NationalSecurityAgency/emissary/releases/tag/8.24.0
More NationalSecurityAgency vulnerabilities
- TI-2026-39515 NationalSecurityAgency/skills-service has Stored XSS via User Registration Enabling Admin Account Takeover CVSS 3.1CRITICAL 9.6
- TI-2023-08846 Ghidra/RuntimeScripts/Linux/support/launch.sh in NSA Ghidra through 10.2.2 passes… CVSS 3.1CRITICAL 9.8
- TI-2026-37876 Ghidra < 12.1 - SQL Injection via Unescaped Filter Values in BSim Search CVSS 4.0HIGH 8.7
- TI-2026-27685 Emissary has an OS Command Injection via Unvalidated IN_FILE_ENDING / OUT_FILE_ENDING in Executrix CVSS 3.1HIGH 8.8
- TI-2026-04310 NSA Ghidra Auto-Analysis Annotation Command Execution CVSS 3.1HIGH 8.8
- TI-2026-37873 Ghidra < 12.0.4 - Path Traversal via Zip Slip in Theme Import CVSS 4.0HIGH 8.4
Sources
- CVE-2025-27508 · CVE Program
- CVE-2025-27508 · NVD
- FIRST EPSS
- GHSA-hw43-fcmm-3m5g · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences