CVE-2026-119600
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AI Threat Summary
CVE-2026-119600 is a moderate vulnerability with a CVSS score of 4.8 affecting the target software. Authentication can be bypassed allowing unauthenticated access. Threat hunters should monitor for exploit attempts and apply vendor patches immediately.
Description
tcpflow through 1.6.1 contains an out-of-bounds read vulnerability that allows unauthenticated attackers to read process memory by sending packets with forged IP payload lengths. Attackers can inject crafted IPv4 or IPv6 TCP packets into captured traffic or pcap files to leak adjacent memory into reconstructed flow files or crash tcpflow.
Attack Chain
Attacker identifies authentication endpoint and tests for bypass conditions
Attacker exploits CVE-2026-119600 authentication flaw to gain unauthorized access without valid credentials
Attacker enumerates accessible resources, users, and configurations
Attacker exfiltrates sensitive data accessible without proper authorization
MITRE ATT&CK Techniques
Indicators of Compromise
| Type | Value | Description | |
|---|---|---|---|
| user_agent | Mozilla/5.0 (compatible; exploit/1.0) |
Generic exploit scanner user agent pattern | |
| url | /api/vuln-endpoint?payload=<malicious> |
Exploit attempt against application endpoint — monitor access logs for anomalous params |
Remediation
Quick Facts
| CVE ID | CVE-2026-119600 |
| CVSS Score | 4.8 |
| Vector | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:L |
| Published | 2026-10-30 |
| Exploited | No |
| CISA KEV | No |
| PoC | Not public |
References
- https://github.com/simsong/tcpflow
- https://github.com/simsong/tcpflow/blob/tcpflow-1.6.1/src/tc…
- https://github.com/simsong/tcpflow/blob/tcpflow-1.6.1/src/tc…
- https://github.com/simsong/tcpflow/issues/279
- https://hackmd.io/@haindpwn/tcpflow-ip-payload-length-oob-re…
- https://www.vulncheck.com/advisories/tcpflow-through-1.6.1-o…