CVE-2026-77788Network attack vectorHinoki check available

Metadata overwrite via unchecked object ownership

Published Sep 2, 2026 · Updated Sep 2, 2026

Authorization bypass in Rank Math SEO 1.0.48 through 1.0.276 allows remote authenticated users to overwrite arbitrary post and user metadata. The updateSchemas path accepts a metadata row identifier but fails to verify that the row belongs to the post or user covered by the caller's authorization. Author-level access is sufficient, and the write can alter metadata belonging to higher-privileged users.

CVSS severity4.9
Medium
EPSS probability0.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Authorization bypass in Rank Math SEO 1.0.48 through 1.0.276 allows remote authenticated users to overwrite arbitrary post and user metadata. The updateSchemas path accepts a metadata row identifier but fails to verify that the row belongs to the post or user covered by the caller's authorization. Author-level access is sufficient, and the write can alter metadata belonging to higher-privileged users.

The record

CVE
CVE-2026-77788
Published
Sep 2, 2026
Updated
Sep 2, 2026
Vendor
Rank Math SEO
Product
Rank Math SEO
Classifications
CWE-639, T1565.001
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 2, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 2, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.0.48 <1.0.277

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Rank Math SEO · Rank Math SEOversion=1.0.48 <1.0.277

Published CVSS scores

4.9CISA-ADPCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-639Authorization Bypass Through User-Controlled Key
T1565.001Stored Data Manipulation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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