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Vulnerability record · CVE-2026-48113 · published 3 August 2026

CVE-2026-48113: Incorrect authorization vulnerability

Chisel is a TCP/UDP tunnel, transported over HTTP and secured via SSH. In versions prior to 1.11.5, authenticated clients can bypass --authfile ACL restrictions and tunnel traffic to arbitrary destinations reachable from the server. The ACL is enforced only during the initial handshake against declared remotes, but never on subsequent SSH channels that carry actual traffic. A malicious client can authenticate with a permitted remote, then open channels to any host:port it wants. This issue has been fixed in version 1.11.5.

8.5 CVSS 4.0 High EPSS 0.39% · top 69.9% CWE-863 · Incorrect authorization Awaiting Analysis
8.5CVSS 4.0 base score
0.39%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
3References
10 Sep 2026Last modified by NVD

Description

Chisel is a TCP/UDP tunnel, transported over HTTP and secured via SSH. In versions prior to 1.11.5, authenticated clients can bypass --authfile ACL restrictions and tunnel traffic to arbitrary destinations reachable from the server. The ACL is enforced only during the initial handshake against declared remotes, but never on subsequent SSH channels that carry actual traffic. A malicious client can authenticate with a permitted remote, then open channels to any host:port it wants. This issue has been fixed in version 1.11.5.

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:L/VA:N/SC:H/SI:H/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

LinkTags
https://github.com/jpillora/chisel/commit/44310b65667a97901874ffdf4815b3732c22eaa3
https://github.com/jpillora/chisel/security/advisories/GHSA-24fp-5v3p-rvpw
https://github.com/jpillora/chisel/security/advisories/GHSA-24fp-5v3p-rvpw

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Source: NIST National Vulnerability Database (record CVE-2026-48113), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.