CVE-2026-104852

HIGHPre-NVD 8.28.2
EchelonGraph scoreMEDIUM confidence

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

This high-severity CVE scores 8.2 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.5% (39th 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

Also known asEUVD-2026-92849 (ENISA EUVD) · GHSA-7mx3-vvmw-hjmv (GitHub Security Advisories)Source: ENISA EUVD

8.2EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 8.2Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

GraphQL Tools provides utilities for building, stitching, and mocking GraphQL schemas. Prior to 12.0.1, the GraphQL Tools utils package's mergeDeep function follows inherited properties while recursively merging source objects and does not exclude __proto__, constructor, or prototype keys. An unauthenticated GraphQL client can alias fields to those names so responses from two subgraphs collide during ordinary supergraph result merging, causing mergeDeep to traverse Object and Function prototypes and overwrite Function.prototype.call with a subgraph-supplied value. This breaks subsequent requests in the process until restart. This issue is fixed in version 12.0.1.

CVSS
8.2
EG Score
8.2HIGHmedium confidence
EG Risk
37
EG Risk 37/100

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)
Severity82% × 45%
Impact severity (EG Severity): CVSS 8.2 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.4% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at every mission impact level.
Exploitation none (CISA Vulnrichment) · Automatable no (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.
EPSS PROB
0.5%
EPSS %ILE
39th
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 (8.2): severity, escalated by confirmed exploitation. This CVE's 8.2 is its impact severity (EG Severity), not escalated.

EG Severity
8.2 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.a secondary CVSS source
EG Likelihood
0.5% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-11-10). 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 every mission impact level.CISA BOD 26-04: 60 days if the affected system is publicly exposed; Fix on system upgrade 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 every mission impact level.

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (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)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable no (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

October 5, 2026

Last Modified

October 6, 2026

Advisory Details (4)

Auto-updated Oct 5, 2026
Patch available. Sources: github, github_pr, github_commit.
GitHub commit

commit 0b9529f1988f (ardatan/graphql-tools)

Fix landed in ardatan/graphql-tools commit 0b9529f1988f — awaiting tagged release

https://github.com/ardatan/graphql-tools/commit/0b9529f1988fd36186a7c106a6efe0356f1b7f2e
GitHub pull request

Drop prototype polluting keys from subgraph results before merging them

Fix merged in graphql-hive/gateway PR #2600 on 2026-09-07 — awaiting tagged release

https://github.com/graphql-hive/gateway/pull/2600
GitHub pull request

Fix prototype pollution in `mergeDeep`

Fix merged in ardatan/graphql-tools PR #8423 on 2026-09-07 — awaiting tagged release

https://github.com/ardatan/graphql-tools/pull/8423
GitHub advisoryMentions a patch (unverified)

Prototype pollution in well-established utility function `mergeDeep` · Advisory · ardatan/graphql-tools · GitHub

https://github.com/ardatan/graphql-tools/security/advisories/GHSA-7mx3-vvmw-hjmv

Vendor Advisories for CVE-2026-104852(2)

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

Patch Availability(2)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
redhatrhoai/odh-mlflow-rhel9:17919478572026-10-21redhat
npm@graphql-tools/utils @ 12.0.1 (fixes <= 12.0.0)—ghsa

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(1 across 1 ecosystem)
npm(1)
PackageVulnerable rangeFix by version rangeDependents
@graphql-tools/utils—
  • every version up to 12.0.1: fixed in 12.0.1
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 9× in last 7d / 36× 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 its CVE.org record (CNA or CISA ADP). An arrow marks a change the record states ("CVSS → 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). "EchelonGraph re-scored" is our own recompute of this CVE's score, not an update from a source, and is not counted in the refreshes above. Most recent first.

  1. 2026-11-13 16:50 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  2. 2026-11-12 16:32 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  3. 2026-11-11 16:37 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  4. 2026-11-11 03:23 UTCEchelonGraph re-scored
  5. 2026-11-11 03:23 UTCVendor advisory
  6. 2026-11-11 03:23 UTCGHSA enrichmentGHSA-7mx3-vvmw-hjmv · GitHub severity HIGH
  7. 2026-11-10 16:41 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  8. 2026-11-09 16:34 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  9. 2026-11-08 16:38 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  10. 2026-11-07 16:38 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  11. 2026-11-06 16:35 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  12. 2026-11-05 16:36 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  13. 2026-11-04 16:34 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  14. 2026-11-03 19:50 UTCEchelonGraph re-scored
  15. 2026-11-03 19:50 UTCVendor advisory
  16. 2026-11-03 19:50 UTCGHSA enrichmentGHSA-7mx3-vvmw-hjmv · GitHub severity HIGH
  17. 2026-11-03 16:46 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  18. 2026-11-02 16:43 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  19. 2026-11-01 16:33 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  20. 2026-11-01 08:00 UTCGHSA enrichmentGHSA-7mx3-vvmw-hjmv · GitHub severity HIGH
  21. 2026-11-01 08:00 UTCEchelonGraph re-scored
  22. 2026-10-31 16:31 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  23. 2026-10-30 16:33 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  24. 2026-10-29 16:32 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  25. 2026-10-28 16:31 UTCEPSS rescoreEPSS 0.4% · 29th percentile
Show 41 more
  1. 2026-10-27 20:37 UTCEchelonGraph re-scored
  2. 2026-10-27 20:37 UTCVendor advisory
  3. 2026-10-27 16:31 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  4. 2026-10-26 16:30 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  5. 2026-10-25 16:32 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  6. 2026-10-25 14:55 UTCEchelonGraph re-scored
  7. 2026-10-24 16:32 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  8. 2026-10-23 16:31 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  9. 2026-10-22 16:33 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  10. 2026-10-21 16:32 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  11. 2026-10-20 19:14 UTCEchelonGraph re-scored
  12. 2026-10-20 16:31 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  13. 2026-10-19 16:31 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  14. 2026-10-18 16:31 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  15. 2026-10-18 05:09 UTCEchelonGraph re-scored
  16. 2026-10-17 19:39 UTCEchelonGraph re-scored
  17. 2026-10-17 16:33 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  18. 2026-10-16 16:40 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  19. 2026-10-15 16:31 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  20. 2026-10-14 16:31 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  21. 2026-10-13 16:33 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  22. 2026-10-12 16:40 UTCEchelonGraph re-scored
  23. 2026-10-12 16:33 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  24. 2026-10-11 19:44 UTCEchelonGraph re-scored
  25. 2026-10-11 18:27 UTCEchelonGraph re-scored
  26. 2026-10-11 15:01 UTCEchelonGraph re-scored
  27. 2026-10-11 13:47 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  28. 2026-10-11 07:18 UTCEchelonGraph re-scored
  29. 2026-10-10 19:59 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  30. 2026-10-10 06:28 UTCEchelonGraph re-scored
  31. 2026-10-09 20:06 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  32. 2026-10-08 17:11 UTCEchelonGraph re-scored
  33. 2026-10-08 17:11 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  34. 2026-10-08 04:46 UTCEchelonGraph re-scored
  35. 2026-10-07 23:47 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  36. 2026-10-06 15:23 UTCEchelonGraph re-scored
  37. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  38. 2026-10-06 14:55 UTCEchelonGraph re-scored
  39. 2026-10-05 23:26 UTCEchelonGraph re-scored
  40. 2026-10-05 23:01 UTCEchelonGraph re-scoredFirst assessed: 8.2 HIGH
  41. 2026-10-05 23:00 UTCMITRE cvelistV5first tracked

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npm:@graphql-tools/utils

Frequently asked(5)

What is CVE-2026-104852?
CVE-2026-104852 is a high-severity vulnerability; its CVE record was published on October 5, 2026. GraphQL Tools provides utilities for building, stitching, and mocking GraphQL schemas. Prior to 12.0.1, the GraphQL Tools utils package's mergeDeep function follows inherited properties while recursively merging source objects and does not exclude proto, constructor, or prototype keys. An…
When was the CVE record for CVE-2026-104852 published?
The CVE record for CVE-2026-104852 was published on October 5, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of October 6, 2026; the record at its source may have been updated since.
Is CVE-2026-104852 actively exploited?
CVE-2026-104852 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (39th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-104852?
CVE-2026-104852 has a CVSS base score of 8.2 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-104852?
A fix for CVE-2026-104852 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-104852 are linked in the Vendor Advisories panel on this page.

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