CVE-2026-72831

HIGHPre-NVD 8.88.8—
EchelonGraph scoreHIGH confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2026-08-14. a secondary CVSS source baseline 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this weekElevated
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.8Exploit: Elevated riskExposed: 0

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

The Flex Objects plugin (through 1.4.6, tested with Grav 2.0.11) contains an incorrect authorization vulnerability in its Flex Objects API. FlexApiController::update() checks only the general Flex directory permission and does not apply the additional target/field/super-admin checks enforced by the dedicated Users and Groups API controllers. An authenticated account with api.access, admin.login, and users.update permissions (but without api.users.write or admin.super) can use the generic /api/v1/flex-objects/user-accounts endpoint to change a super administrator's password, or the /api/v1/flex-objects/user-groups endpoint to grant its group admin.super, resulting in full site takeover. Fixed in Flex Objects 1.4.7.

CVSS v3
8.8
EG Score
8.8(high)
EG Risk
56(Track*)
EG Risk 56/100SSVC: Track*

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity88% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Watch closely — could escalate to Attend.
EPSS PROB
0%
EPSS %ILE
23%
KEV
Not listed

Published

August 14, 2026

Last Modified

August 18, 2026

Advisory Details (3)

Auto-updated Aug 14, 2026
Patch available. Sources: github, github_commit.
generic

Grav through 2.0.11 Authentication Bypass via Flex Objects | Advisories | VulnCheck

https://www.vulncheck.com/advisories/grav-through-authentication-bypass-via-flex-objects
github_commit Patch Available

commit ad9709f865b0 (getgrav/grav)

Patch available: getgrav/grav 2.0.11 (contains commit ad9709f865b0)

https://github.com/getgrav/grav/commit/ad9709f865b09b68798fb1ac375b484a8cc1d892
github Patch Available

Low-privileged user can change super-admin password through Flex Objects · Advisory · getgrav/grav · GitHub

https://github.com/getgrav/grav/security/advisories/GHSA-pc8m-jxvh-vmrc

Vendor Advisories for CVE-2026-72831(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 29× in last 7d / 29× 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. 2026-08-20 16:54 UTCGHSA enrichment
  2. 2026-08-20 04:26 UTCEG score recompute
  3. 2026-08-20 04:26 UTCGHSA enrichment
  4. 2026-08-19 17:04 UTCEPSS rescore
  5. 2026-08-19 15:57 UTCGHSA enrichment
  6. 2026-08-19 03:28 UTCGHSA enrichment
  7. 2026-08-18 14:58 UTCEG score recompute
  8. 2026-08-18 14:58 UTCGHSA enrichment
  9. 2026-08-18 13:49 UTCEPSS rescore
  10. 2026-08-18 13:49 UTCEPSS rescore
  11. 2026-08-18 02:20 UTCEG score recompute
  12. 2026-08-18 02:20 UTCGHSA enrichment
  13. 2026-08-17 15:14 UTCEG score recompute
  14. 2026-08-17 15:14 UTCGHSA enrichment
  15. 2026-08-17 13:47 UTCEPSS rescore
  16. 2026-08-17 02:46 UTCEG score recompute
  17. 2026-08-17 02:46 UTCGHSA enrichment
  18. 2026-08-16 14:56 UTCEPSS rescore
  19. 2026-08-16 14:56 UTCEPSS rescore
  20. 2026-08-16 14:17 UTCEG score recompute
  21. 2026-08-16 14:17 UTCGHSA enrichment
  22. 2026-08-16 02:15 UTCEPSS rescore
  23. 2026-08-16 01:49 UTCGHSA enrichment
  24. 2026-08-15 13:20 UTCGHSA enrichment
  25. 2026-08-15 00:51 UTCEG score recompute
Show 4 more
  1. 2026-08-15 00:51 UTCGHSA enrichment
  2. 2026-08-14 12:22 UTCEG score recompute
  3. 2026-08-14 11:49 UTCEG score recompute
  4. 2026-08-14 11:49 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-72831?
CVE-2026-72831 is a high vulnerability published on August 14, 2026. The Flex Objects plugin (through 1.4.6, tested with Grav 2.0.11) contains an incorrect authorization vulnerability in its Flex Objects API. FlexApiController::update() checks only the general Flex directory permission and does not apply the additional target/field/super-admin checks enforced by the…
When was CVE-2026-72831 disclosed?
CVE-2026-72831 was first published in the National Vulnerability Database on August 14, 2026, with the most recent update on August 18, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-72831 actively exploited?
CVE-2026-72831 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 77.1% of all scored CVEs.
What is the CVSS score of CVE-2026-72831?
CVE-2026-72831 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2026-72831?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-72831, 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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