Quick answers
- Is CVE-2026-111738 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-111738 being exploited in the wild.
- How severe is CVE-2026-111738?
- Informational severity, published 23 October 2026.
- Which products and versions are affected?
- SiteGround Speed Optimizer before 7.8.5.
- Is there a fix for CVE-2026-111738?
- Yes: fixed in 7.8.5. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-111738 attacked?
- It is attacked over the network, in a software library.
- Am I affected by CVE-2026-111738?
- Check whether you run SiteGround Speed Optimizer 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.
How to fix
- Fixed in: 7.8.5
Technical details
The plugin fails to validate whether a user has network-level (super admin) privileges before applying option changes to the entire multisite network via enable-option/disable-option functions, and does not restrict which options may be modified. An authenticated site administrator can exploit this to escalate privileges and alter network-wide options, bypassing intended access controls (CWE-863: Incorrect Authorization).
Affected products
- SiteGround Speed Optimizer before 7.8.5
Timeline
- 2026-10-21: disclosed
- 2026-10-23: advisory