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SCA: security update for pannellum (GHSA-8423-w5wx-h2r6)

medium Tenable Self-Hosted Container Security Plugin ID 437877

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - Pannellum is a lightweight, free, and open source panorama viewer for the web. In versions 3.5.0 through
 2.5.6, the hot spot attributes configuration property allowed any attribute to be set, including HTML
 event handler attributes, allowing for potential XSS attacks. This affects websites hosting the standalone
 viewer HTML file and any other use of untrusted JSON config files (bypassing the protections of the
 escapeHTML parameter). As certain events fire without any additional user interaction, visiting a
 standalone viewer URL that points to a malicious config file — without additional user interaction — is
 sufficient to trigger the vulnerability and execute arbitrary JavaScript code, which can, for example,
 replace the contents of the page with arbitrary content and make it appear to be hosted by the website
 hosting the standalone viewer HTML file. This issue has been fixed in version 2.5.7. To workaround,
 setting the Content-Security-Policy header to script-src-attr 'none' will block execution of inline event
 handlers, mitigating this vulnerability. Don't host pannellum.htm on a domain that shares cookies with
 user authentication to mitigate XSS risk. (CVE-2026-27210)

See Also

https://github.com/advisories/GHSA-8423-w5wx-h2r6

Plugin Details

Severity: Medium

ID: 437877

Version: Revision 1.7

Type: Local

Family: SCA Checks

Published: 2/20/2026

Updated: 7/2/2026

Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Medium

Score: 4.3

Percentile: 53.59

Vendor

Vendor Severity: Medium

CVSS v2

Risk Factor: Medium

Base Score: 6.4

Temporal Score: 4.7

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:N

CVSS Score Source: CVE-2026-27210

CVSS v3

Risk Factor: Medium

Base Score: 6.1

Temporal Score: 5.3

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

CVSS v4

Risk Factor: Medium

Base Score: 5.3

Threat Score: 1.3

Threat Vector: CVSS:4.0/E:U

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 2/19/2026

Vulnerability Publication Date: 2/19/2026

Reference Information

CVE: CVE-2026-27210

cwe: CWE-79