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Vulnerabilities

Vulnerability · CVE-2025-66648

vega-functions provides function implementations for the Vega expression language.

Published Jan 5, 2026 · catalog updated Oct 14, 2026 · vega-functions project

Check if you run it

No confirmed exploitation is on record for CVE-2025-66648. EPSS is 0.23%. Act only if a listed version of vega-functions project is installed.

Gaps on this record

  • No version range is stored. A customer cannot check an installed version against this record.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Medium6.1
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.23%
Remediation
Advisory link
Affected products
cpe vega-functions project/vega-functions

vega-functions provides function implementations for the Vega expression language. Prior to version 6.1.1, for sites that allow users to supply untrusted user input, malicious use of an internal function (not part of the public API) could be used to run unintentional javascript (XSS). This issue is fixed in vega-functions . There is no workaround besides upgrading. Using as described in CSP safe mode does not prevent this issue.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe vega-functions project/vega-functionsversion unspecified

How to fix CVE-2025-66648

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2025-66648. EPSS is 0.23%. Act only if a listed version of vega-functions project is installed.

Which versions are affected?

Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-79: Cross-site Scripting (XSS). EPSS 0.23%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Jan 5, 2026 · NIST NVD

    Detected

    vega-functions provides function implementations for the Vega expression language. Prior to version 6.1.1, for sites that allow users to supply untrusted user input, malicious use of an internal function (not part of the public API) could be used to run unintentional javascript (XSS). This issue is fixed in vega-functions . There is no workaround besides upgrading. Using as described in CSP safe m

  2. Oct 14, 2026 · NIST NVD

    Updated

    vega-functions provides function implementations for the Vega expression language. Prior to version 6.1.1, for sites that allow users to supply untrusted user input, malicious use of an internal function (not part of the public API) could be used to run unintentional javascript (XSS). This issue is fixed in vega-functions . There is no workaround besides upgrading. Using as described in CSP safe m

Sources

  • CVE.orgVulnerability recordCVE-2025-66648

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2025-66648

    30-day exploitation probability 0.2%

    first.org
  • NIST NVDVulnerability recordCVE-2025-66648

    vega-functions provides function implementations for the Vega expression language. Prior to version 6.1.1, for sites that allow users to supply untrusted user input, malicious use of an internal function (not part of the public API) could be used to run unintentional javascript (

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.