CVE-2026-48113Public exploitNetwork attack vector

Authenticated ACL bypass via unchecked SSH channel target

Published Aug 3, 2026 · Updated Aug 3, 2026

Incorrect authorization in Chisel before 1.11.5 allows remote authenticated users to tunnel to server-reachable destinations. The SSH channel handler accepts client-controlled ExtraData as a host and port and dials it without reapplying the --authfile ACL checked during setup. Exploitation requires valid Chisel credentials and an ACL-permitted handshake remote, and exposes every destination the server process can reach.

CVSS severity8.5
High
EPSS probability0.29%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Incorrect authorization in Chisel before 1.11.5 allows remote authenticated users to tunnel to server-reachable destinations. The SSH channel handler accepts client-controlled ExtraData as a host and port and dials it without reapplying the --authfile ACL checked during setup. Exploitation requires valid Chisel credentials and an ACL-permitted handshake remote, and exposes every destination the server process can reach.

The record

CVE
CVE-2026-48113
Published
Aug 3, 2026
Updated
Aug 3, 2026
Vendor
jpillora
Product
Chisel
Classifications
CWE-863, T1090.001
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 3, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 1.11.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

jpillora · Chiselversion=< 1.11.5

Published CVSS scores

8.5GitHub_MCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:L/VA:N/SC:H/SI:H/SA:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-863Incorrect Authorization
T1090.001Internal Proxy

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo