Quick answers
- Is CVE-2026-67435 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-67435 being exploited in the wild.
- How severe is CVE-2026-67435?
- Medium severity, with a CVSS score of 4, published 29 July 2026.
- Which products and versions are affected?
- linuxfabrik-lib (PyPI) < 6.0.0, ECOSYSTEM:introduced=0,fixed=6.0.0.
- Is there a fix for CVE-2026-67435?
- Yes. linuxfabrik-lib (PyPI): upgrade to 6.0.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-67435 attacked?
- It is attacked over the network, in a software library.
- Am I affected by CVE-2026-67435?
- Check whether you run linuxfabrik-lib (PyPI) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
How to fix
- linuxfabrik-lib (PyPI): upgrade to 6.0.0 or later
pip install "linuxfabrik-lib>=6.0.0"
Technical details
The `lib.url.fetch()` function in linuxfabrik-lib fails to strip non-standard authentication headers when following HTTP redirects to a different origin. While standard headers like `Authorization` and `Cookie` were stripped by the underlying `httpx` library, other caller-supplied headers (e.g., Redfish's `X-Auth-Token`) remained attached to the redirected request. An attacker-controlled or compromised server can respond to an authenticated request with a 3xx redirect to a malicious host, capturing the sensitive headers. This issue is fixed in version 6.0.0, which now drops all non-transport headers on cross-origin redirects.
Affected products
- Linuxfabrik linuxfabrik-lib < 6.0.0
Identifiers
- CVE-2026-67435
- GHSA-4jc5-g844-4x33
- PYSEC-2026-3578
Timeline
- 2026-07-07: disclosed: Advisory published by Linuxfabrik
- 2026-07-07: patched: Fixed in version 6.0.0 (commit 6573ff9)
- 2026-07-30: advisory: GitHub Advisory published