Is CVE-2026-78738 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-78738 being exploited in the wild.

How severe is CVE-2026-78738?

Medium severity, with a CVSS score of 6.1, published 8 September 2026.

Is there a fix for CVE-2026-78738?

A patch was published on 2026-09-05: Fixed in version 6.4.7 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-78738 attacked?

It is attacked over the network, in a web application.

Am I affected by CVE-2026-78738?

Check whether you run Silverpeas Core at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-78738: Silverpeas Core stored XSS in document file upload

CVE-2026-78738 · Severity: medium · CVSS 6.1 · Published 2026-09-08

Silverpeas Core is an enterprise collaboration and content management platform. A stored cross-site scripting (XSS) vulnerability in the Document management file upload feature allows authenticated users with specific roles to inject malicious JavaScript that executes when other users preview uploaded files, potentially leading to account compromise or data theft.

Quick answers

Is CVE-2026-78738 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-78738 being exploited in the wild.
How severe is CVE-2026-78738?: Medium severity, with a CVSS score of 6.1, published 8 September 2026.
Which products and versions are affected?: Silverpeas Core 6.4.6.
Is there a fix for CVE-2026-78738?: A patch was published on 2026-09-05: Fixed in version 6.4.7 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-78738 attacked?: It is attacked over the network, in a web application.
Am I affected by CVE-2026-78738?: Check whether you run Silverpeas Core at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

The Document management application in Silverpeas Core 6.4.6 fails to sanitize the X-FULL-PATH header during file upload operations. An authenticated attacker with Manager, Publisher, or Writer role can intercept the upload request and replace this header with a JavaScript payload (e.g., <img src=x onerror=prompt(1);>). The payload is stored server-side and executed in the browser when a user clicks the file preview button. This is a stored XSS vulnerability accessible to authenticated users on the network. The vulnerability was fixed in version 6.4.7.

Affected products

Silverpeas Silverpeas Core 6.4.6

Timeline

2026-09-08: disclosed: CVE-2026-78738 published on NVD
2026-09-05: patched: Fixed in version 6.4.7

References

https://hekk.one/posts/research/cve-2026-78738/

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