CVE-2026-44843

HIGHNVD 8.28.2—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.2 under NVD CVSS v3. EPSS exploit probability: 0.4%, top 66% 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, nvd
8.2EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.2Exploit: None knownExposed: 0

A fix is available — apply it.

LangChain is a framework for building agents and LLM-powered applications. Prior to 0.3.85 and 1.3.3, LangChain contains older runtime code paths that deserialize run inputs, run outputs, or other application-controlled payloads using overly broad object allowlists. These paths may call load() with allowed_objects="all". This does not enable arbitrary Python object deserialization, but it does allow any trusted LangChain-serializable object to be revived, which is broader than these runtime paths require. As a result, attacker-supplied LangChain serialized constructor dictionaries may cause trusted runtime paths to instantiate classes with untrusted constructor arguments. This vulnerability is fixed in 0.3.85 and 1.3.3.

CVSS v3
8.2
EG Score
8.2(medium)
EG Risk
52(Track)
EG Risk 52/100SSVC: 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
Severity82% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
34%
KEV
Not listed

Published

May 26, 2026

Last Modified

July 24, 2026

Advisory Details (1)

Auto-updated Jun 3, 2026
Patch available. Sources: github.
github Patch Available

Unsafe deserialization of attacker-controlled LangChain objects through overly broad `load()` allowlists · Advisory · langchain-ai/langchain · GitHub

https://github.com/langchain-ai/langchain/security/advisories/GHSA-pjwx-r37v-7724

Vendor Advisories for CVE-2026-44843(3)

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

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatmta/mta-solution-server-rhel9:17841098832026-07-21redhat

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)
PyPI(1)
PackageVulnerable rangeFixed inDependents
langchain-core0.0.1 ... 1.3.2 (266 versions)1.3.3—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 5× in last 7d / 57× 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.

Showing the most recent 100 of 171 total refreshes for this CVE.

  1. 2026-09-06 13:47 UTCEPSS rescore
  2. 2026-09-04 05:06 UTCEPSS rescore
  3. 2026-09-02 14:12 UTCEPSS rescore
  4. 2026-09-01 13:54 UTCEPSS rescore
  5. 2026-08-30 19:17 UTCEPSS rescore
  6. 2026-08-30 01:22 UTCEPSS rescore
  7. 2026-08-28 21:41 UTCEPSS rescore
  8. 2026-08-27 14:25 UTCEPSS rescore
  9. 2026-08-26 14:46 UTCEPSS rescore
  10. 2026-08-25 13:49 UTCEPSS rescore
  11. 2026-08-23 15:56 UTCEG score recompute
  12. 2026-08-23 15:56 UTCVendor advisory
  13. 2026-08-23 00:19 UTCEPSS rescore
  14. 2026-08-21 23:49 UTCEPSS rescore
  15. 2026-08-21 21:20 UTCEG score recompute
  16. 2026-08-21 21:20 UTCVendor advisory
  17. 2026-08-20 22:55 UTCEPSS rescore
  18. 2026-08-20 17:58 UTCEG score recompute
  19. 2026-08-20 17:58 UTCVendor advisory
  20. 2026-08-19 17:04 UTCEPSS rescore
  21. 2026-08-18 13:48 UTCEPSS rescore
  22. 2026-08-17 13:47 UTCEPSS rescore
  23. 2026-08-17 09:30 UTCVendor advisory
  24. 2026-08-16 16:30 UTCEG score recompute
  25. 2026-08-16 16:30 UTCVendor advisory
Show 75 more
  1. 2026-08-16 14:56 UTCEPSS rescore
  2. 2026-08-16 03:02 UTCEG score recompute
  3. 2026-08-16 03:02 UTCVendor advisory
  4. 2026-08-16 02:14 UTCEPSS rescore
  5. 2026-08-15 01:41 UTCEG score recompute
  6. 2026-08-15 01:41 UTCVendor advisory
  7. 2026-08-15 01:30 UTCEPSS rescore
  8. 2026-08-14 13:41 UTCVendor advisory
  9. 2026-08-14 01:40 UTCEG score recompute
  10. 2026-08-14 01:40 UTCVendor advisory
  11. 2026-08-13 22:00 UTCEPSS rescore
  12. 2026-08-13 01:56 UTCVendor advisory
  13. 2026-08-12 13:56 UTCEG score recompute
  14. 2026-08-12 13:56 UTCVendor advisory
  15. 2026-08-12 13:51 UTCEPSS rescore
  16. 2026-08-12 01:41 UTCEG score recompute
  17. 2026-08-12 01:41 UTCVendor advisory
  18. 2026-08-11 13:40 UTCVendor advisory
  19. 2026-08-11 00:20 UTCEG score recompute
  20. 2026-08-11 00:20 UTCVendor advisory
  21. 2026-08-11 00:00 UTCEPSS rescore
  22. 2026-08-10 11:19 UTCVendor advisory
  23. 2026-08-09 23:14 UTCEG score recompute
  24. 2026-08-09 23:14 UTCVendor advisory
  25. 2026-08-09 13:46 UTCEPSS rescore
  26. 2026-08-09 11:14 UTCVendor advisory
  27. 2026-08-08 23:10 UTCEG score recompute
  28. 2026-08-08 23:10 UTCVendor advisory
  29. 2026-08-08 16:37 UTCEPSS rescore
  30. 2026-08-08 09:04 UTCVendor advisory
  31. 2026-08-07 21:04 UTCEG score recompute
  32. 2026-08-07 21:04 UTCVendor advisory
  33. 2026-08-07 09:03 UTCVendor advisory
  34. 2026-08-06 21:02 UTCEG score recompute
  35. 2026-08-06 21:02 UTCVendor advisory
  36. 2026-08-06 13:46 UTCEPSS rescore
  37. 2026-08-06 09:01 UTCVendor advisory
  38. 2026-08-05 21:00 UTCEG score recompute
  39. 2026-08-05 21:00 UTCVendor advisory
  40. 2026-08-05 19:17 UTCEPSS rescore
  41. 2026-08-04 15:10 UTCEPSS rescore
  42. 2026-08-04 10:38 UTCEPSS rescore
  43. 2026-08-04 04:39 UTCVendor advisory
  44. 2026-08-03 16:39 UTCEG score recompute
  45. 2026-08-03 16:39 UTCVendor advisory
  46. 2026-08-03 10:36 UTCEPSS rescore
  47. 2026-08-03 04:25 UTCVendor advisory
  48. 2026-08-02 16:21 UTCVendor advisory
  49. 2026-08-02 04:20 UTCEG score recompute
  50. 2026-08-02 04:20 UTCVendor advisory
  51. 2026-08-02 02:27 UTCEPSS rescore
  52. 2026-08-01 16:19 UTCEG score recompute
  53. 2026-08-01 16:19 UTCVendor advisory
  54. 2026-08-01 04:16 UTCEPSS rescore
  55. 2026-07-31 09:32 UTCEG score recompute
  56. 2026-07-31 09:32 UTCVendor advisory
  57. 2026-07-30 16:28 UTCEPSS rescore
  58. 2026-07-30 01:30 UTCEPSS rescore
  59. 2026-07-29 16:33 UTCEG score recompute
  60. 2026-07-29 16:33 UTCVendor advisory
  61. 2026-07-28 15:36 UTCEPSS rescore
  62. 2026-07-27 14:13 UTCEPSS rescore
  63. 2026-07-26 14:54 UTCEPSS rescore
  64. 2026-07-26 14:54 UTCEPSS rescore
  65. 2026-07-26 07:44 UTCEG score recompute
  66. 2026-07-26 07:44 UTCVendor advisory
  67. 2026-07-25 14:18 UTCEPSS rescore
  68. 2026-07-24 14:17 UTCEPSS rescore
  69. 2026-07-23 14:18 UTCEPSS rescore
  70. 2026-07-23 03:15 UTCEG score recompute
  71. 2026-07-22 14:08 UTCEPSS rescore
  72. 2026-07-21 15:24 UTCEPSS rescore
  73. 2026-07-20 17:08 UTCEPSS rescore
  74. 2026-07-19 14:31 UTCEPSS rescore
  75. 2026-07-19 05:52 UTCOSV refresh

Frequently asked(5)

What is CVE-2026-44843?
CVE-2026-44843 is a high vulnerability published on May 26, 2026. LangChain is a framework for building agents and LLM-powered applications. Prior to 0.3.85 and 1.3.3, LangChain contains older runtime code paths that deserialize run inputs, run outputs, or other application-controlled payloads using overly broad object allowlists. These paths may call load() with…
When was CVE-2026-44843 disclosed?
CVE-2026-44843 was first published in the National Vulnerability Database on May 26, 2026, with the most recent update on July 24, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-44843 actively exploited?
CVE-2026-44843 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 66.1% of all scored CVEs.
What is the CVSS score of CVE-2026-44843?
CVE-2026-44843 has a CVSS v3 base score of 8.2 (NVD).
How do I remediate CVE-2026-44843?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-44843, 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.

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