CVE-2026-118391

HIGHPre-NVD 8.98.9
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

This high-severity CVE scores 8.9 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.5% (42nd percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from a secondary CVSS source
Sources: EPSS, a secondary CVSS source
Trending — 4 sources updated this week

Also known asEUVD-2026-116912 (ENISA EUVD)Source: ENISA EUVD

8.9EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 8.9Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Fixed versions, as the CVE record's CNA (Erlang Ecosystem Foundation) states them: "Upgrade Ecto to 3.14.3 or later."

Allocation of Resources Without Limits or Throttling vulnerability in elixir-ecto ecto allows an unauthenticated remote attacker to exhaust memory in the application and in the database server by sending requests with distinct JSON keys or list lengths where the application interpolates them into json_extract_path/2, field[^key] or splice/1. Ecto caches prepared queries per repository in an ETS table with no size limit and no eviction. Interpolated JSON path elements become part of the query expression instead of its parameters, and splice/1 expands into one placeholder per element, so every distinct key or list length creates a new cache entry. With ecto_sql each entry is also a new prepared statement on the database connection that runs it. None of this memory is released until the processes restart.

This issue affects ecto: from 3.4.0 before 3.14.3.

CVSS v3
8.9
EG Score
8.9HIGHmedium confidence
EG Risk
55
EG Risk 55/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity89% × 45%
Impact severity (EG Severity): CVSS 8.9 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.5% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability100% × 15%
CISA's SSVC Automatable value: yes (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
0.5%
EPSS %ILE
42nd
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (8.9): severity, escalated by confirmed exploitation. This CVE's 8.9 is its impact severity (EG Severity), not escalated.

EG Severity
8.9 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.a secondary CVSS source · CVSS v3.0 or v3.1
EG Likelihood
0.5% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-11-05). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at low or medium mission impact; Attend at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; 60 days if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; 60 days if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

November 4, 2026

Last Modified

November 5, 2026

Advisory Details (10)

Auto-updated Nov 4, 2026
🔬 Proof of concept available. Patch available. Sources: github, github_commit.
GitHub commit Patch Available

commit cb2f03964dac (elixir-ecto/ecto)

Patch available: elixir-ecto/ecto v3.4.5 (contains commit cb2f03964dac)

https://github.com/elixir-ecto/ecto/commit/cb2f03964dac324a9771f84f5088e395326e6de8
Web page

String interpolation will grow cached unboundedly · Issue #1031 · elixir-ecto/ecto · GitHub

https://github.com/elixir-ecto/ecto/issues/1031
Web page

Should we allow disabling of Ecto cache on specific queries? · Issue #4470 · elixir-ecto/ecto · GitHub

https://github.com/elixir-ecto/ecto/issues/4470
GitHub commit

commit eb03f45b999e (elixir-ecto/ecto)

Fix landed in elixir-ecto/ecto commit eb03f45b999e — awaiting tagged release

https://github.com/elixir-ecto/ecto/commit/eb03f45b999e2bf67ffae92811233eb6e56dba55
Web page

Ecto.Query.API — Ecto v3.14.3

https://ecto.hexdocs.pm/Ecto.Query.API.html#splice/1
GitHub commit

commit d0e97d8a6e27 (elixir-ecto/ecto)

Fix landed in elixir-ecto/ecto commit d0e97d8a6e27 — awaiting tagged release

https://github.com/elixir-ecto/ecto/commit/d0e97d8a6e274c81c25fbf08087da8d8b9bae0ea
Web page🟡 PoC Available

OSV - Open Source Vulnerabilities

https://osv.dev/vulnerability/EEF-CVE-2026-118391
Web page🟡 PoC Available

CVE-2026-118391

https://cna.erlef.org/cves/CVE-2026-118391.html
GitHub advisoryMentions a patch (unverified)

Unbounded query cache growth from interpolated JSON paths and splice lists enables memory exhaustion denial of service · Advisory · elixir-ecto/ecto · GitHub

https://github.com/elixir-ecto/ecto/security/advisories/GHSA-cxjx-vmm2-qr8r

Affected Packages

(1 across 1 ecosystem)
Hex(1)
PackageVulnerable rangeFix by version rangeDependents
ecto3.10.0 ... 3.9.6 (60 versions)3.14.3 (one range)—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 8× in last 7d / 8× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

  1. 2026-11-06 16:36 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  2. 2026-11-05 19:27 UTCEG score recompute
  3. 2026-11-05 19:14 UTCEG score recompute
  4. 2026-11-05 16:36 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  5. 2026-11-04 15:03 UTCENISA EUVD ID recordedEUVD-2026-116912 · Source: ENISA EUVD
  6. 2026-11-04 14:26 UTCEG score recompute
  7. 2026-11-04 14:07 UTCEG score recomputeFirst assessed: 8.9 HIGH
  8. 2026-11-04 14:05 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-118391?
CVE-2026-118391 is a high-severity vulnerability; its CVE record was published on November 4, 2026. Allocation of Resources Without Limits or Throttling vulnerability in elixir-ecto ecto allows an unauthenticated remote attacker to exhaust memory in the application and in the database server by sending requests with distinct JSON keys or list lengths where the application interpolates them into…
When was CVE-2026-118391 made public?
CVE-2026-118391 was made public on November 4, 2026: that is the date its CVE record's CNA, Erlang Ecosystem Foundation, gives for when the vulnerability was made public. The CVE record itself was published on November 4, 2026. EchelonGraph's copy of the record carries a last-modified date of November 5, 2026; the record at its source may have been updated since.
Is CVE-2026-118391 actively exploited?
CVE-2026-118391 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (42nd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-118391?
CVE-2026-118391 has a CVSS base score of 8.9 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-118391?
A fix for CVE-2026-118391 is available: update to the fixed version the vendor names in its advisory. Fixed versions, as the CVE record's CNA (Erlang Ecosystem Foundation) states them: "Upgrade Ecto to 3.14.3 or later."

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