CVE-2026-65603

HIGHPre-NVD 8.88.8—
EchelonGraph scoreHIGH confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2026-07-22. a secondary CVSS source baseline 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: ghsa, secondary
Trending — 3 sources updated this week
8.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: —CVSS: 8.8Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

The Grav Login plugin (grav-plugin-login) versions <= 3.8.11 contain a privilege escalation flaw in the authenticated profile self-update handler (processUserProfile(), the update_user task). Unlike the registration handler, this handler does not strip privilege fields ('groups','access') from user-submitted form data before persisting them. When an administrator has added 'groups' and/or 'access' to plugins.login.user_registration.fields and the default 'regular'/DataUser account backend is in use, a low-privilege authenticated user can POST crafted profile form data (e.g. access[admin][super]=true) to escalate to super-admin, enabling admin panel access, scheduler abuse (RCE), and Twig evaluation. Fixed in 3.8.12.

CVSS v3
8.8
EG Score
8.8(high)
EPSS
—
KEV
Not listed

Published

July 22, 2026

Last Modified

July 22, 2026

Advisory Details (2)

Auto-updated Jul 22, 2026
🔬 Proof of concept available. Patch available. Sources: github.
generic

Grav Login Plugin 3.8.11 Privilege Escalation via Profile Update | Advisories | VulnCheck

https://www.vulncheck.com/advisories/grav-login-plugin-privilege-escalation-via-profile-update
github Patch Available🟡 PoC Available

Privilege escalation via profile self-update (update_user) mass-assignment of groups/access on default backend · Advisory · getgrav/grav · GitHub

https://github.com/getgrav/grav/security/advisories/GHSA-h33v-82r9-v8pm

Vendor Advisories for CVE-2026-65603(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 4× in last 7d / 4× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-22 13:35 UTCEG score recompute
  2. 2026-07-22 13:35 UTCGHSA enrichment
  3. 2026-07-22 11:32 UTCEG score recompute
  4. 2026-07-22 11:32 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(4)

What is CVE-2026-65603?
CVE-2026-65603 is a high vulnerability published on July 22, 2026. The Grav Login plugin (grav-plugin-login) versions <= 3.8.11 contain a privilege escalation flaw in the authenticated profile self-update handler (processUserProfile(), the updateuser task). Unlike the registration handler, this handler does not strip privilege fields ('groups','access') from…
When was CVE-2026-65603 disclosed?
CVE-2026-65603 was first published in the National Vulnerability Database on July 22, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
What is the CVSS score of CVE-2026-65603?
CVE-2026-65603 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2026-65603?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-65603, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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