CVE-2026-28277

MEDIUMNVD 6.86.8—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.8 under NVD CVSS v3. EPSS exploit probability: 0.3%, top 44% 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
6.8
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 5%CVSS: 6.8Exploit: NoneExposed: 0

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

LangGraph SQLite Checkpoint is an implementation of LangGraph CheckpointSaver that uses SQLite DB (both sync and async, via aiosqlite). In version 1.0.9 and prior, LangGraph checkpointers can load msgpack-encoded checkpoints that reconstruct Python objects during deserialization. If an attacker can modify checkpoint data in the backing store (for example, after a database compromise or other privileged write access to the persistence layer), they can potentially supply a crafted payload that triggers unsafe object reconstruction when the checkpoint is loaded. No known patch is public.

CVSS v3
6.8
EG Score
6.8(medium)
EPSS
91.6%
KEV
Not listed

Published

March 5, 2026

Last Modified

April 21, 2026

References (1)

Vendor Advisories for CVE-2026-28277(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)
PyPI(1)
PackageVulnerable rangeFixed inDependents
langgraph0.0.10 ... 1.0.9 (242 versions)1.0.10rc1—

Data Freshness Timeline

(refreshed 10× in last 7d / 45× 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 101 total refreshes for this CVE.

  1. 2026-07-17 09:20 UTCOSV refresh
  2. 2026-07-16 17:03 UTCEPSS rescore
  3. 2026-07-16 17:03 UTCEPSS rescore
  4. 2026-07-15 16:57 UTCEPSS rescore
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  21. 2026-06-30 23:22 UTCEPSS rescore
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  23. 2026-06-29 08:02 UTCOSV refresh
  24. 2026-06-28 14:07 UTCEPSS rescore
  25. 2026-06-28 14:07 UTCEPSS rescore
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  1. 2026-06-28 04:56 UTCEPSS rescore
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  21. 2026-06-16 17:52 UTCEPSS rescore
  22. 2026-06-15 17:48 UTCEPSS rescore
  23. 2026-06-14 23:18 UTCEPSS rescore
  24. 2026-06-13 23:00 UTCEPSS rescore
  25. 2026-06-12 23:12 UTCEPSS rescore
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  27. 2026-06-11 14:00 UTCEPSS rescore
  28. 2026-06-10 22:18 UTCEPSS rescore
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  40. 2026-06-05 06:10 UTCEPSS rescore
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  44. 2026-06-02 20:13 UTCEPSS rescore
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  46. 2026-06-01 13:51 UTCEPSS rescore
  47. 2026-06-01 13:51 UTCEPSS rescore
  48. 2026-06-01 10:43 UTCOSV refresh
  49. 2026-05-31 22:30 UTCEPSS rescore
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  51. 2026-05-31 00:16 UTCEPSS rescore
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  53. 2026-05-29 13:44 UTCEPSS rescore
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  66. 2026-05-24 16:59 UTCEPSS rescore
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  68. 2026-05-22 21:16 UTCEPSS rescore
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  71. 2026-05-20 22:37 UTCEPSS rescore
  72. 2026-05-20 21:44 UTCEG score recompute
  73. 2026-05-20 11:22 UTCEPSS rescore
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  75. 2026-05-20 11:21 UTCEPSS rescore

Frequently asked(5)

What is CVE-2026-28277?
CVE-2026-28277 is a medium vulnerability published on March 5, 2026. LangGraph SQLite Checkpoint is an implementation of LangGraph CheckpointSaver that uses SQLite DB (both sync and async, via aiosqlite). In version 1.0.9 and prior, LangGraph checkpointers can load msgpack-encoded checkpoints that reconstruct Python objects during deserialization. If an attacker can…
When was CVE-2026-28277 disclosed?
CVE-2026-28277 was first published in the National Vulnerability Database on March 5, 2026, with the most recent update on April 21, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-28277 actively exploited?
CVE-2026-28277 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 91.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-28277?
CVE-2026-28277 has a CVSS v3 base score of 6.8 (NVD).
How do I remediate CVE-2026-28277?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-28277, 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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