CVE-2026-35049 wire-ios has Persistent Remote DoS via Integer Underflow
Attackers can cause a persistent denial of service in the Wire iOS app by sending a short encrypted message, crashing the client until local data is wiped.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-35049?
CVE-2026-35049 is a medium-severity vulnerability in wireapp wire-ios, published on 2 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
wire-ios is an iOS client for the Wire secure messaging application. Prior to version 4.16.0, upon receiving a crafted malicious Proteus external message with an encrypted payload that is shorter than 16 bytes, the Wire iOS client crashes. The crash is triggered automatically after message receival with no user interaction. Since the malicious message persists in the conversation, the app enters a crash loop on relaunch and cannot be reopened until the local state is wiped. This issue has been fixed with version 4.16.0 which introduces the missing length check and is available via the App Store. No known workarounds are available.
Which versions are affected by CVE-2026-35049?
How do I fix CVE-2026-35049?
No fix has been published for CVE-2026-35049 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-35049 being exploited?
There is no known exploitation of CVE-2026-35049 in the wild and no public exploit code.
Sources
Also known as GHSA-v6wg-c7qc-x66g.