Remote Out-of-Bounds Read in liftoff-sr CIPster TCP Encapsulation Receive Path
CVE-2026-76989

6.9MEDIUM

Key Information:

Vendor

Liftoff-sr

Status
Cipster
Vendor
CVE Published:
20 August 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-76989?

A security vulnerability exists within the liftoff-sr CIPster product that affects the TCP Encapsulation Receive Path. Specifically, an unknown function in the source file source/src/enet_encap/encap.cc allows for out-of-bounds reading due to improper input validation. This flaw can be exploited remotely, potentially compromising system integrity and confidentiality. A patch has been issued to mitigate this issue, ensuring users should deploy it to maintain security.

Affected Version(s)

CIPster 1802525be27d33e19a9a83c163e331a1d13b1892

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-76989 - Proof of Concept

References

https://vuldb.com/vuln/393612
vdb-entry
https://vuldb.com/vuln/393612/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-76989
third-party-advisory

CVSS V4

Score:
6.9
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Carnegie (VulDB User)
.