CVE-2026-77454

MEDIUMPre-NVD 5.95.9—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.9 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.1%, top 97% 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
5.9EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.9Exploit: None knownExposed: 0

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

Incorrect Authorization vulnerability in ash-project ash_sql allows a caller to bypass a scoping or authorization filter expressed as exists/2 over a relationship that declares both a limit (or from_many?) and a parent(...)-referencing filter or sort.

AshSql.Join.related_query/3 skips the caller-supplied exists predicate for such relationships and delegates it to limit_from_many/5. When the relationship's own filter or sort references parent(...), limit_from_many/5 takes a branch that drops both the limit and the predicate, emitting a bare correlated EXISTS with no predicate. The check then matches any record that has any related row. Most severely, when the expression backs a policy (for example authorize_if expr(exists(memberships, user_id == ^actor(:id)))), the actor-scoping condition disappears and the policy passes for any actor with any related row.

This issue affects ash_sql: from 0.4.1 before 0.7.1.

CVSS v3
5.9
EG Score
5.9(medium)
EG Risk
31(Track)
EG Risk 31/100SSVC: 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
Severity59% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
3%
KEV
Not listed

Published

August 30, 2026

Last Modified

September 1, 2026

Advisory Details (4)

Auto-updated Aug 30, 2026
🔬 Proof of concept available. Patch available. Sources: github, github_commit.
generic

OSV - Open Source Vulnerabilities

https://osv.dev/vulnerability/EEF-CVE-2026-77454
github Patch Available🟡 PoC Available

Filter loss in `AshSql.Join` `exists/2` in AshSql fails open for relationships with a limit and a `parent(...)` filter, bypassing authorization · Advisory · ash-project/ash_sql · GitHub

https://github.com/ash-project/ash_sql/security/advisories/GHSA-8v9m-8pxv-738c
github_commit Patch Available

commit 865fdd4e5e70 (ash-project/ash_sql)

Patch available: ash-project/ash_sql v0.7.1 (contains commit 865fdd4e5e70)

https://github.com/ash-project/ash_sql/commit/865fdd4e5e70724a23b19c048e6768c31d2209ab
generic

CVE-2026-77454

https://cna.erlef.org/cves/CVE-2026-77454.html

Affected Packages

(1 across 1 ecosystem)
Hex(1)
PackageVulnerable rangeFixed inDependents
ash_sql0.4.1 ... 0.7.0 (22 versions)0.7.1—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 11× in last 7d / 30× 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 21:27 UTCEG score recompute
  2. 2026-09-18 19:28 UTCEPSS rescore
  3. 2026-09-17 21:23 UTCEG score recompute
  4. 2026-09-16 21:43 UTCEG score recompute
  5. 2026-09-16 14:08 UTCEPSS rescore
  6. 2026-09-16 05:15 UTCEPSS rescore
  7. 2026-09-15 22:06 UTCEG score recompute
  8. 2026-09-15 03:12 UTCEPSS rescore
  9. 2026-09-15 03:12 UTCEPSS rescore
  10. 2026-09-12 23:12 UTCEG score recompute
  11. 2026-09-12 15:02 UTCEPSS rescore
  12. 2026-09-11 23:34 UTCEG score recompute
  13. 2026-09-11 14:53 UTCEPSS rescore
  14. 2026-09-10 23:57 UTCEG score recompute
  15. 2026-09-10 09:35 UTCEPSS rescore
  16. 2026-09-08 23:38 UTCEG score recompute
  17. 2026-09-08 22:01 UTCEPSS rescore
  18. 2026-09-07 19:17 UTCEG score recompute
  19. 2026-09-06 19:39 UTCEG score recompute
  20. 2026-09-06 13:48 UTCEPSS rescore
  21. 2026-09-05 19:59 UTCEG score recompute
  22. 2026-09-04 20:22 UTCEG score recompute
  23. 2026-09-04 05:07 UTCEPSS rescore
  24. 2026-09-01 15:08 UTCEG score recompute
  25. 2026-09-01 13:54 UTCEPSS rescore
Show 5 more
  1. 2026-09-01 04:40 UTCEPSS rescore
  2. 2026-09-01 04:40 UTCEPSS rescore
  3. 2026-08-30 12:29 UTCEG score recompute
  4. 2026-08-30 12:16 UTCEG score recompute
  5. 2026-08-30 12:15 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-77454?
CVE-2026-77454 is a medium vulnerability published on August 30, 2026. Incorrect Authorization vulnerability in ash-project ashsql allows a caller to bypass a scoping or authorization filter expressed as exists/2 over a relationship that declares both a limit (or frommany?) and a parent(...)-referencing filter or sort. AshSql.Join.relatedquery/3 skips the…
When was CVE-2026-77454 disclosed?
CVE-2026-77454 was first published in the National Vulnerability Database on August 30, 2026, with the most recent update on September 1, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-77454 actively exploited?
CVE-2026-77454 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 97.4% of all scored CVEs.
What is the CVSS score of CVE-2026-77454?
CVE-2026-77454 has a CVSS v3 base score of 5.9 (NVD).
How do I remediate CVE-2026-77454?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-77454, 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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