Read the docs
TI-2026-16143 Aliases CVE-2026-19912GHSA-537c-gp6x-jr7q

Improper input validation in Kaltura HTML5 Video Player, html5 library

Priority MEDIUM 51CWE-20Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA.

Summary

The Kaltura HTML5 player (mwEmbed / html5lib) contains an unauthenticated remote code execution vulnerability caused by unsafe data deserialization and unsanitized filesystem path construction. mwEmbedLoader.php accepts a user‑controlled ServiceUrl, whose response is passed to unserialize(), and the resulting object’s fields are written to a cache path derived from attacker‑supplied uiconf_id without proper path validation. An attacker can write arbitrary files into web‑accessible locations and achieve code execution as the webserver user. Affected versions include html5lib v2.45, v2.103 and earlier, and other v2.x releases exposing the vulnerable endpoint.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.01011 63rd percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
KalturaKaltura HTML5 Video Player, html5 libraryup to v2.103; 2.45—No fix listedCNA
  • Kaltura HTML5 Video Player, html5 library VendorKaltura Affected up to v2.103; 2.45 Fixed in — No fix listed CNA

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-19912
  2. 2026-10-03 Alias added: GHSA-537c-gp6x-jr7q

References

Other 1

  • TI-2017-10304 The getUserzoneCookie function in Kaltura before 13.2.0 uses a hardcoded cookie secret to… CVSS 3.0CRITICAL 9.8
  • TI-2016-09164 Kaltura < 11.1.0-2 PHP Object Injection RCE CVSS 4.0CRITICAL 9.3
  • TI-2026-16144 Improper input validation in Kaltura HTML5 Video Player, html5lib library CVSS 3.1HIGH 7.5
  • TI-2017-10302 The wiki_decode Developer System Helper function in the admin panel in Kaltura before… CVSS 3.1HIGH 7.2
  • TI-2017-10303 Multiple cross-site scripting (XSS) vulnerabilities in Kaltura before 13.2.0 allow remote… CVSS 3.0MEDIUM 6.1
  • TI-2017-04199 An issue was discovered in Kaltura server Lynx-12.11.0. CVSS 3.0MEDIUM 6.1
See all 9 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences