CVE-2026-97869

MEDIUMPre-NVD 4.14.1—
EchelonGraph scoreHIGH confidence

Score 4.1 from GitHub Security Advisory (severity: LOW) published 2026-09-25. A secondary CVSS source baseline 4.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
4.1EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 4.1Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

A flaw has been found in langchain4j up to 1.5.3-beta10/1.11.10-beta18/1.18.1-beta27. This vulnerability affects the function AgenticScopeSerializer.fromJson of the file AgenticScopeJsonSerializationIT.java of the component LangChain4j-agentic. This manipulation causes deserialization. Remote exploitation of the attack is possible. The attack's complexity is rated as high. It is stated that the exploitability is difficult. The exploit has been published and may be used. Upgrading to version 1.5.3-beta11, 1.11.10-beta19 and 1.18.1-beta28 is able to resolve this issue. Upgrading the affected component is advised. The project maintainer kindly explains: "The issue was reported to us privately on 23 July 2026 and fixed in releases published on 29 July 2026. It is tracked as GHSA-gmwr-7wmf-mrjm. Exploitation requires an application to have enabled AgenticScope persistence, which is opt-in, and an attacker who can already write to that store. All maintained release lines have been patched."

CVSS v3
4.1
EG Score
4.1MEDIUMhigh confidence
EG Risk
23
EG Risk 23/100CISA SSVC

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
Severity41% × 45%
Exploitation0% × 40%
Automatability30% × 15%
CISA SSVC: Track at low or medium mission impact; Track or Attend at high (mission-essential systems).
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
0.4%
EPSS %ILE
29th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track or 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 (no KEV listing, exploit record or EPSS ≥ 50%) · Automatable unknown (not published for this CVE) · Technical impact partial (CVSS below 9.0). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

September 25, 2026

Last Modified

September 28, 2026

Advisory Details (4)

Auto-updated Sep 25, 2026
🔬 Proof of concept available. Patch available. Sources: github_release, github.
generic

GitHub - langchain4j/langchain4j: LangChain4j is an idiomatic, open-source Java library for building LLM-powered applications on the JVM. It offers a unified API over popular LLM providers and vector stores, and makes implementing tool calling (including MCP support), agents and RAG easy. It integrates seamlessly with enterprise Java frameworks like Quarkus and Spring Boot. · GitHub

https://github.com/langchain4j/langchain4j/
github_release Patch Available

1.18.1 and 1.18.1-beta28

Patch available: langchain4j/langchain4j 1.18.1

https://github.com/langchain4j/langchain4j/releases/tag/1.18.1
generic

CVE/Insecure Jackson Default Typing Leads to Arbitrary Class Instantiation in LangChain4j Agentic Module.md at main · afish3201-debug/CVE · GitHub

https://github.com/afish3201-debug/CVE/blob/main/Insecure%20Jackson%20Default%20Typing%20Leads%20to%20Arbitrary%20Class%20Instantiation%20in%20LangChain4j%20Agentic%20Module.md
github Patch Available🟡 PoC Available

Unsafe Jackson Default Typing Deserialization in langchain4j-agentic AgenticScopeSerializer · Advisory · langchain4j/langchain4j · GitHub

https://github.com/langchain4j/langchain4j/security/advisories/GHSA-gmwr-7wmf-mrjm

Vendor Advisories for CVE-2026-97869(1)

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

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 20× in last 7d / 27× 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. 2026-10-03 21:55 UTCEG score recompute
  2. 2026-10-03 21:55 UTCGHSA enrichment
  3. 2026-10-03 14:26 UTCEPSS rescore
  4. 2026-10-02 20:38 UTCEG score recompute
  5. 2026-10-02 20:38 UTCGHSA enrichment
  6. 2026-10-02 17:57 UTCEPSS rescore
  7. 2026-10-01 19:51 UTCEPSS rescore
  8. 2026-10-01 19:15 UTCGHSA enrichment
  9. 2026-09-30 18:01 UTCEG score recompute
  10. 2026-09-30 18:01 UTCGHSA enrichment
  11. 2026-09-30 15:04 UTCEPSS rescore
  12. 2026-09-29 16:46 UTCEG score recompute
  13. 2026-09-29 16:46 UTCGHSA enrichment
  14. 2026-09-28 15:33 UTCEG score recompute
  15. 2026-09-28 15:33 UTCGHSA enrichment
  16. 2026-09-28 13:52 UTCEPSS rescore
  17. 2026-09-28 13:52 UTCEPSS rescore
  18. 2026-09-27 20:13 UTCEG score recompute
  19. 2026-09-27 20:13 UTCGHSA enrichment
  20. 2026-09-27 13:49 UTCEPSS rescore
  21. 2026-09-26 18:59 UTCEG score recompute
  22. 2026-09-26 18:59 UTCGHSA enrichment
  23. 2026-09-26 15:59 UTCEPSS rescore
  24. 2026-09-25 16:26 UTCEG score recompute
  25. 2026-09-25 16:25 UTCNVD updateCVSS v4 → 1.2
Show 2 more
  1. 2026-09-25 15:21 UTCEG score recompute
  2. 2026-09-25 15:19 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-97869?
CVE-2026-97869 is a medium vulnerability published on September 25, 2026. A flaw has been found in langchain4j up to 1.5.3-beta10/1.11.10-beta18/1.18.1-beta27. This vulnerability affects the function AgenticScopeSerializer.fromJson of the file AgenticScopeJsonSerializationIT.java of the component LangChain4j-agentic. This manipulation causes deserialization. Remote…
When was CVE-2026-97869 disclosed?
CVE-2026-97869 was first published on September 25, 2026, with the most recent update on September 28, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-97869 actively exploited?
CVE-2026-97869 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (29th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-97869?
CVE-2026-97869 has a CVSS base score of 4.1 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-97869?
A fix for CVE-2026-97869 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-97869 are linked in the Vendor Advisories panel on this page.

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