CVE-2025-27508 Emissary Use of a Broken or Risky Cryptographic Algorithm
Emissary defaults to weak cryptographic algorithms like SHA-1, potentially compromising data integrity and security guarantees for users relying on its checksum features.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-27508?
CVE-2025-27508 is a high-severity vulnerability in NationalSecurityAgency emissary, published on 5 Mar 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Weakness: CWE-327
Which versions are affected by CVE-2025-27508?
2 open source packages ship an affected version, including gov.nsa.emissary:emissary.
| Package | Affected | Fixed in |
|---|---|---|
gov.nsa.emissary:emissary Maven | All versions | 8.24.0 |
gov.nsa.emissary:emissary Maven | All versions | 8.24.0 |
How do I fix CVE-2025-27508?
Upgrade gov.nsa.emissary:emissary to 8.24.0 or later.
Is CVE-2025-27508 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-27508 exists.
Sources
Also known as GHSA-hw43-fcmm-3m5g.