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CVE-2026-25478

Litestar vulnerability

7.4 HIGHPublic exploitEPSS 0.48%
  1. Published9 Feb 2026

Description

Litestar is an Asynchronous Server Gateway Interface (ASGI) framework. Prior to 2.20.0, CORSConfig.allowed_origins_regex is constructed using a regex built from configured allowlist values and used with fullmatch() for validation. Because metacharacters are not escaped, a malicious origin can match unexpectedly. The check relies on allowed_origins_regex.fullmatch(origin). This vulnerability is fixed in 2.20.0.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionRequired
ScopeChanged
ConfidentialityHigh
IntegrityNone
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N

Affected products

Litestar< 2.20.0

Remediation

Fixed in
Litestar≥ 2.20.0

References

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Frequently asked

Is CVE-2026-25478 being actively exploited?

CVE-2026-25478 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.48%.

How severe is CVE-2026-25478?

CVE-2026-25478 has a CVSS 3.1 base score of 7.4, rated high. EPSS estimates a 0.48% probability of exploitation.

Which products are affected by CVE-2026-25478?

Affected products include Litestar.

How do I fix CVE-2026-25478?

Upgrade affected software to a fixed version, for example Litestar 2.20.0 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-25478 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.