CVE-2026-102507 Sliver 1.7.7 Denial of Service via PE Parser Slice Bounds in Operator RPC
A hostile implant can crash the Sliver teamserver by sending malformed download responses, causing a denial of service for all operators.
- 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-2026-102507?
CVE-2026-102507 is a medium-severity denial of service vulnerability in BishopFox sliver, published on 29 Sep 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
Sliver C2 framework version 1.7.7 and earlier contains an unhandled panic vulnerability in the operator gRPC handler that allows an attacker controlling a compromised implant to crash the entire teamserver by returning a malformed or empty Download response. Attackers can send zero-length or 1-3 byte data payloads through a hostile implant session to trigger an out-of-bounds slice access in the vendored Binject library's BinaryMagic function, which propagates unrecovered through the operator gRPC interceptor chain and terminates the server process, affecting all connected operators.
Weakness: CWE-125
Which versions are affected by CVE-2026-102507?
How do I fix CVE-2026-102507?
No fix has been published for CVE-2026-102507 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-102507 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-102507 exists.
Sources
Also known as GHSA-57xm-mfg7-58xm.