CVE-2025-42978 Insufficiently Secure Hostname Verification for Outbound TLS Connections in SAP NetWeaver Application Server Java
Attackers can bypass TLS hostname verification to intercept outbound connections and disclose sensitive information from SAP NetWeaver Application Server Java.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2025-42978?
CVE-2025-42978 is a low-severity vulnerability in SAP_SE SAP NetWeaver Application Server Java, published on 8 Jul 2025. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
The widely used component that establishes outbound TLS connections in SAP NetWeaver Application Server Java does not reliably match the hostname that is used for the connection against the wildcard hostname defined in the received certificate of remote TLS server. This might lead to the outbound connection being established to a possibly malicious remote TLS server and hence disclose information. Integrity and Availability are not impacted.
Weakness: CWE-940
Which versions are affected by CVE-2025-42978?
How do I fix CVE-2025-42978?
No fix has been published for CVE-2025-42978 yet. Limit exposure of the affected software until one is available.
Is CVE-2025-42978 being exploited?
There is no known exploitation of CVE-2025-42978 in the wild and no public exploit code.
Sources
Also known as GHSA-2hqw-mcx8-2828.