Affects cPanel WP Toolkit used widely by hosting providers; allows cross-account RCE and file exfiltration on shared hosting, potentially disrupting many customers and providers.
CVE-2026-87900
Authenticated argument-injection in cPanel WP Toolkit allows cross-account RCE and file read
do firstUpgrade to a fixed release: < 6.11.3-10850.
Is CVE-2026-87900 being exploited?
Not confirmed. CVE-2026-87900 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.65% probability of exploitation in the next 30 days.
How severe is CVE-2026-87900?
CVE-2026-87900 is rated Critical with a CVSS score of 9.4. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-87900?
Not known from our data. No patch reference has been recorded for CVE-2026-87900, which is not the same as no patch existing — a fix may have shipped without a tagged reference, or after this record was written. The vendor advisory is the only authority on whether a fix exists, and mitigations may be available regardless.
What does CVE-2026-87900 affect?
CVE-2026-87900 affects cPanel WP Toolkit <= 6.11.2-10794, cPanel-managed shared hosting servers. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-87900?
Restrict WP Toolkit/admin access, isolate affected servers, rotate admin creds; apply vendor patch when released.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Authenticated remote code execution and arbitrary file read across customer accounts via argument injection, enabling account takeover and data theft.
Immediate action required
- affected<= 6.11.2-10794
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.
cisa ssvc
- exploitation
- none
- automatable
- no
- technical impact
- total
Assessed by CISA 23 Sept 2026 (SSVC 2.0.3).
timeline
- 23 Sept 2026Published
- 23 Sept 2026CISA SSVC assessment: exploitation none · same day later
- 23 Sept 2026CVE record last updated · same day later
- 24 Sept 2026Analysed by vulneraibility.com · same day later
- Linksupport.cpanel.net /hc/en-us/articles/43597969409943
sources
- CVE List (CVE.org): description, affected versions, references; CVE Terms of Use
- NVD: CVSS and CPE data
- CISA Vulnrichment (ADP): SSVC decision points
- FIRST EPSS: exploit probability and percentile
- Summary, impact and triage tags: written by our AI analysis pipeline from the sources above. Check them against the sources.