CVE-2026-47191Network attack vectorHinoki check available

Repository substitution via SHA-like branch checkout

Published Aug 14, 2026 · Updated Aug 14, 2026

Improper Git reference validation in Siemens kas before 5.3 allows attackers to substitute a branch for a pinned commit during checkout. The checkout_cmd method in kas/repos.py sent a 40- or 64-hex-character desired_ref directly to git checkout, which resolves an identically named branch instead of requiring a commit object. Exploitation requires control of a referenced repository and a victim build that treats only a SHA-1 or SHA-256 commit ID as its integrity anchor, allowing attacker-controlled source to enter the checkout.

CVSS severity2.1
Low
EPSS probability0.16%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Improper Git reference validation in Siemens kas before 5.3 allows attackers to substitute a branch for a pinned commit during checkout. The checkout_cmd method in kas/repos.py sent a 40- or 64-hex-character desired_ref directly to git checkout, which resolves an identically named branch instead of requiring a commit object. Exploitation requires control of a referenced repository and a victim build that treats only a SHA-1 or SHA-256 commit ID as its integrity anchor, allowing attacker-controlled source to enter the checkout.

The record

CVE
CVE-2026-47191
Published
Aug 14, 2026
Updated
Aug 14, 2026
Vendor
Siemens
Product
kas
Classifications
CWE-347, T1195.001
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 14, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 14, 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=< 5.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Siemens · kasversion=< 5.3

Published CVSS scores

2.1GitHubCVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N

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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-347Improper Verification of Cryptographic Signature
T1195.001Compromise Software Dependencies and Development Tools

Public exploit references

No public exploit references are available in this record.

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