Regular Expression without Anchors Affecting datahub-ingestion-fips package, versions <1.5.0.1-r2


Severity

Recommended
0.0
high
0
10

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Threat Intelligence

EPSS
0.01% (2nd percentile)

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  • Snyk IDSNYK-CHAINGUARDLATEST-DATAHUBINGESTIONFIPS-16700929
  • published15 May 2026
  • disclosed5 May 2026

Introduced: 5 May 2026

NewCVE-2026-40110  (opens in a new tab)
CWE-777  (opens in a new tab)

How to fix?

Upgrade Chainguard datahub-ingestion-fips to version 1.5.0.1-r2 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream datahub-ingestion-fips package and not the datahub-ingestion-fips package as distributed by Chainguard. See How to fix? for Chainguard relevant fixed versions and status.

Jupyter Server is the backend for Jupyter web applications. In versions 2.17.0 and earlier, the Origin header validation uses Python's re.match() to check incoming origins against the allow_origin_pat configuration value. Because re.match() only anchors at the start of the string and does not require a full match, a pattern intended to match only a trusted domain (e.g., trusted.example.com) will also match any origin that begins with that domain followed by additional characters (e.g., trusted.example.com.evil.com). An attacker who controls such a domain can bypass the CORS origin restriction and make cross-origin requests to the Jupyter Server API from an untrusted site. This issue has been fixed in version 2.18.0.

CVSS Base Scores

version 3.1