CVE-2026-53769

MEDIUMPre-NVD 6.56.5—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.5 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.3%, top 83% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
Elevated
6.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.5Exploit: Elevated riskExposed: 0

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

Avo is a framework to create admin panels for Ruby on Rails apps. From version 2.28.0 to before version 3.32.0, Avo's direct attachment upload endpoint lacks server-side upload authorization and bypasses the documented field-level upload policy methods such as upload_{FIELD_ID}?. An authenticated Avo user who can reach the Avo attachment upload endpoint can replace or add attachment content, including binary content, filename, and content-type metadata, on a resolved record even when both update? and upload_? policies deny the operation. This primarily affects multi-role Avo Pro/Advanced-style deployments where non-administrator or restricted operator users can reach Avo and per-record or per-field operations are expected to be enforced by policies. This issue has been patched in version 3.32.0.

CVSS v3
6.5
EG Score
6.5(medium)
EG Risk
45(Track)
EG Risk 45/100SSVC: 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
Severity65% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
17%
KEV
Not listed

Published

July 9, 2026

Last Modified

September 9, 2026

Advisory Details (4)

Auto-updated Sep 4, 2026
🔬 Proof of concept available. Patch available. Sources: github_pr, github_commit, github_release, github.
github_release Patch Available

Release v3.32.0

Patch available: avo-hq/avo v3.32.0

https://github.com/avo-hq/avo/releases/tag/v3.32.0
github_commit Patch Available

commit de12070dbac0 (avo-hq/avo)

Patch available: avo-hq/avo v4.0.15 (contains commit de12070dbac0)

https://github.com/avo-hq/avo/commit/de12070dbac0cb6a7e2bea357f9697f99e92554c
github_pr Patch Available

fix: attachment upload authorization in attachments controller

Patch available: avo-hq/avo v4.0.15 (PR #4520 merged 2026-06-02)

https://github.com/avo-hq/avo/pull/4520
github Patch Available🟡 PoC Available

Direct attachment upload endpoint lacks upload authorization and bypasses field-level upload policy · Advisory · avo-hq/avo · GitHub

https://github.com/avo-hq/avo/security/advisories/GHSA-pqpw-cvm4-8mv9

Vendor Advisories for CVE-2026-53769(1)

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

Affected Packages

(1 across 1 ecosystem)
RubyGems(1)
PackageVulnerable rangeFixed inDependents
avo2.28.0 ... 3.9.2 (281 versions)3.32.0—

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 17× 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. 2026-09-18 19:28 UTCEPSS rescore
  2. 2026-09-18 05:35 UTCEG score recompute
  3. 2026-09-16 14:08 UTCEPSS rescore
  4. 2026-09-16 05:15 UTCEPSS rescore
  5. 2026-09-14 08:05 UTCEG score recompute
  6. 2026-09-13 16:47 UTCEPSS rescore
  7. 2026-09-13 08:18 UTCEG score recompute
  8. 2026-09-12 03:22 UTCEG score recompute
  9. 2026-09-11 14:53 UTCEPSS rescore
  10. 2026-09-10 09:35 UTCEPSS rescore
  11. 2026-09-09 16:55 UTCEG score recompute
  12. 2026-09-09 16:04 UTCEG score recompute
  13. 2026-09-08 22:01 UTCEPSS rescore
  14. 2026-09-07 16:01 UTCEPSS rescore
  15. 2026-09-06 13:47 UTCEPSS rescore
  16. 2026-09-05 22:30 UTCEG score recompute
  17. 2026-09-04 21:28 UTCEG score recompute
  18. 2026-07-30 12:13 UTCEG score recompute
  19. 2026-07-26 12:17 UTCEG score recompute
  20. 2026-07-23 03:19 UTCEG score recompute
  21. 2026-07-09 21:46 UTCEG score recompute

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-53769?
CVE-2026-53769 is a medium vulnerability published on July 9, 2026. Avo is a framework to create admin panels for Ruby on Rails apps. From version 2.28.0 to before version 3.32.0, Avo's direct attachment upload endpoint lacks server-side upload authorization and bypasses the documented field-level upload policy methods such as upload{FIELDID}?. An authenticated Avo…
When was CVE-2026-53769 disclosed?
CVE-2026-53769 was first published in the National Vulnerability Database on July 9, 2026, with the most recent update on September 9, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-53769 actively exploited?
CVE-2026-53769 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 82.8% of all scored CVEs.
What is the CVSS score of CVE-2026-53769?
CVE-2026-53769 has a CVSS v3 base score of 6.5 (NVD).
How do I remediate CVE-2026-53769?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-53769, 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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