CVE-2026-48121

MEDIUMPre-NVD 6.76.7—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.7 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.2%, top 86% 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
6.7EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.7Exploit: None knownExposed: 0

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

@langchain/langgraph-checkpoint-mongodb provides a LangGraph.js CheckpointSaver implementation that uses MongoDB for storage. Versions 1.3.0 and below are vulnerable to NoSQL injection: checkpoint identifiers (thread_id, checkpoint_ns, checkpoint_id) from config.configurable are passed into MongoDB find() queries in MongoDBSaver.getTuple() without type enforcement. If an attacker supplies an object payload (such as MongoDB operators $gt or $ne) instead of a string, it can be interpreted as a query operator, bypassing thread scoping and leaking checkpoints, including pending writes, across tenants. Applications are at risk if they forward untrusted input into config.configurable without coercing it to strings or validating it against a schema, particularly in multi-tenant or user-isolated setups. Apps that only use server-issued, string-typed identifiers with schema validation rejecting non-string fields are not affected. This issue has been fixed in version 1.3.1.

CVSS v3
6.7
EG Score
6.7(medium)
EG Risk
30(Track)
EG Risk 30/100SSVC: 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
Severity67% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
14%
KEV
Not listed

Published

June 12, 2026

Last Modified

August 4, 2026

Advisory Details (3)

Auto-updated Aug 4, 2026
Patch available. Sources: github, github_commit.
github_commit Patch Available

commit 284226c7ca16 (langchain-ai/langgraphjs)

Patch available: langchain-ai/langgraphjs @langchain/[email protected] (contains commit 284226c7ca16)

https://github.com/langchain-ai/langgraphjs/commit/284226c7ca164b3c81fe2d9e32b10f1fc6b99a3c
generic

Security: NoSQL injection in MongoDBSaver.getTuple permits cross-tenant checkpoint disclosure · Issue #2351 · langchain-ai/langgraphjs · GitHub

https://github.com/langchain-ai/langgraphjs/issues/2351
github Patch Available

NoSQL parameter injection in MongoDBSaver allows cross-tenant state access · Advisory · langchain-ai/langgraphjs · GitHub

https://github.com/langchain-ai/langgraphjs/security/advisories/GHSA-98xf-r82g-9mhx

Vendor Advisories for CVE-2026-48121(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)
npm(1)
PackageVulnerable rangeFixed inDependents
@langchain/langgraph-checkpoint-mongodb—1.3.1—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 10× in last 7d / 38× 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. 2026-08-25 13:49 UTCEPSS rescore
  2. 2026-08-24 23:51 UTCEG score recompute
  3. 2026-08-23 10:30 UTCEG score recompute
  4. 2026-08-23 00:19 UTCEPSS rescore
  5. 2026-08-21 23:49 UTCEPSS rescore
  6. 2026-08-21 09:55 UTCEG score recompute
  7. 2026-08-20 22:55 UTCEPSS rescore
  8. 2026-08-20 11:29 UTCEG score recompute
  9. 2026-08-19 17:04 UTCEPSS rescore
  10. 2026-08-19 13:45 UTCEG score recompute
  11. 2026-08-18 13:48 UTCEPSS rescore
  12. 2026-08-17 14:29 UTCEG score recompute
  13. 2026-08-17 13:47 UTCEPSS rescore
  14. 2026-08-16 16:44 UTCEG score recompute
  15. 2026-08-16 14:56 UTCEPSS rescore
  16. 2026-08-16 02:14 UTCEPSS rescore
  17. 2026-08-15 18:53 UTCEG score recompute
  18. 2026-08-15 01:30 UTCEPSS rescore
  19. 2026-08-13 23:27 UTCEG score recompute
  20. 2026-08-13 22:00 UTCEPSS rescore
  21. 2026-08-13 01:43 UTCEG score recompute
  22. 2026-08-12 13:51 UTCEPSS rescore
  23. 2026-08-12 04:00 UTCEG score recompute
  24. 2026-08-11 06:16 UTCEG score recompute
  25. 2026-08-11 00:00 UTCEPSS rescore
Show 19 more
  1. 2026-08-10 08:33 UTCEG score recompute
  2. 2026-08-09 13:46 UTCEPSS rescore
  3. 2026-08-09 10:50 UTCEG score recompute
  4. 2026-08-08 16:37 UTCEPSS rescore
  5. 2026-08-08 13:06 UTCEG score recompute
  6. 2026-08-06 17:39 UTCEG score recompute
  7. 2026-08-06 13:47 UTCEPSS rescore
  8. 2026-08-05 19:56 UTCEG score recompute
  9. 2026-08-05 19:17 UTCEPSS rescore
  10. 2026-08-04 20:35 UTCEG score recompute
  11. 2026-08-04 20:07 UTCEG score recompute
  12. 2026-08-04 17:24 UTCEG score recompute
  13. 2026-07-30 09:27 UTCEG score recompute
  14. 2026-07-26 20:43 UTCEG score recompute
  15. 2026-07-23 03:18 UTCEG score recompute
  16. 2026-06-14 23:18 UTCEPSS rescore
  17. 2026-06-13 23:00 UTCEPSS rescore
  18. 2026-06-12 23:12 UTCEPSS rescore
  19. 2026-06-12 15:11 UTCEG score recompute

Frequently asked(5)

What is CVE-2026-48121?
CVE-2026-48121 is a medium vulnerability published on June 12, 2026. @langchain/langgraph-checkpoint-mongodb provides a LangGraph.js CheckpointSaver implementation that uses MongoDB for storage. Versions 1.3.0 and below are vulnerable to NoSQL injection: checkpoint identifiers (threadid, checkpointns, checkpoint_id) from config.configurable are passed into MongoDB…
When was CVE-2026-48121 disclosed?
CVE-2026-48121 was first published in the National Vulnerability Database on June 12, 2026, with the most recent update on August 4, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-48121 actively exploited?
CVE-2026-48121 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 86.5% of all scored CVEs.
What is the CVSS score of CVE-2026-48121?
CVE-2026-48121 has a CVSS v3 base score of 6.7 (NVD).
How do I remediate CVE-2026-48121?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-48121, 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-48121

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