CVE-2026-91939: Cotonti 1.0.0 Comments Plugin PHP Object Injection via ci Parameter
Vendor fix available · Affected: Cotonti · Exploitation: unlikely (under 1%)
Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.
Higher than 62% of scored CVEs
DescriptionCVE.org
Cotonti 1.0.0 Comments plugin passes the ci GET parameter to unserialize() without allowed_classes restriction, allowing unauthenticated attackers to instantiate arbitrary PHP classes with attacker-controlled properties. Attackers can exploit PHP object injection through crafted serialized payloads to trigger gadget chains and achieve database manipulation or code execution.
Affected products1
From the CVE record. A product or version that is not listed is unknown, not unaffected.
- Cotonti · Cotontifrom 1.0.0 up to and including 1.0.0
On the Atlas
Every published CVE is on the CyberSIXT Atlas, grouped by weakness, vendor and month.
- Exploitation
- Unlikely (under 1%). EPSS under 1%, or no score yet.
- CISA KEV
- Not listed
- Public check
- No public nuclei template
- Vendor
- Cotonti
- Published
- September 2026
CoverageNo articles yet
No CyberSIXT article names CVE-2026-91939 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.