CVE-2026-6607

MEDIUMNVD 5.35.3—
EchelonGraph scoreMEDIUM confidence

Score 5.3 from GitHub Security Advisory published 2026-04-20. NVD baseline CVSS 5.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 3 sources updated this weekElevated
5.3
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 1%CVSS: 5.3Exploit: NoneExposed: 0

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

A security vulnerability has been detected in lm-sys fastchat up to 0.2.36. This issue affects the function api_generate of the component Worker API Endpoint. The manipulation leads to resource consumption. The attack can be initiated remotely. The exploit has been disclosed publicly and may be used. The identifier of the patch is c9e84b89c91d45191dc24466888de526fa04cf33. It is suggested to install a patch to address this issue. Commit ff66426 patched this issue in api_generate of base_model_worker.py and did miss other entry points.

CVSS v3
5.3
EG Score
5.3(medium)
EG Risk
55(Attend)
EG Risk 55/100SSVC: Attend

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
Severity53% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS
46.2%
KEV
Not listed

Published

April 20, 2026

Last Modified

April 22, 2026

References (8)

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
pipfschat—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)
PyPI(1)
PackageVulnerable rangeFixed inDependents
fschat0.1.1 ... 0.2.9 (34 versions)——

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 11× in last 7d / 43× 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. 2026-07-23 03:22 UTCEG score recompute
  2. 2026-07-22 14:08 UTCEPSS rescore
  3. 2026-07-22 14:08 UTCEPSS rescore
  4. 2026-07-21 15:25 UTCEPSS rescore
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  6. 2026-07-20 17:08 UTCEPSS rescore
  7. 2026-07-20 07:04 UTCOSV refresh
  8. 2026-07-19 14:31 UTCEPSS rescore
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  1. 2026-07-06 16:27 UTCEPSS rescore
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  33. 2026-06-14 23:18 UTCEPSS rescore
  34. 2026-06-14 19:07 UTCGHSA enrichment
  35. 2026-06-13 23:00 UTCEPSS rescore
  36. 2026-06-12 23:12 UTCEPSS rescore
  37. 2026-06-12 23:12 UTCEPSS rescore
  38. 2026-06-11 18:38 UTCGHSA enrichment
  39. 2026-06-11 14:00 UTCEPSS rescore
  40. 2026-06-10 22:19 UTCEPSS rescore
  41. 2026-06-10 13:22 UTCEPSS rescore
  42. 2026-06-10 03:08 UTCGHSA enrichment
  43. 2026-06-09 05:17 UTCGHSA enrichment
  44. 2026-06-08 14:17 UTCEPSS rescore
  45. 2026-06-08 02:42 UTCGHSA enrichment
  46. 2026-06-07 15:25 UTCEPSS rescore
  47. 2026-06-07 04:50 UTCGHSA enrichment
  48. 2026-06-06 13:47 UTCEPSS rescore
  49. 2026-06-06 00:44 UTCGHSA enrichment
  50. 2026-06-05 22:47 UTCEPSS rescore
  51. 2026-06-05 06:10 UTCEPSS rescore
  52. 2026-06-04 18:58 UTCGHSA enrichment
  53. 2026-06-04 13:12 UTCEPSS rescore
  54. 2026-06-03 16:17 UTCGHSA enrichment
  55. 2026-06-02 20:13 UTCEPSS rescore
  56. 2026-06-02 14:49 UTCGHSA enrichment
  57. 2026-06-01 16:56 UTCGHSA enrichment
  58. 2026-06-01 13:52 UTCEPSS rescore
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  73. 2026-05-20 22:38 UTCEPSS rescore
  74. 2026-05-20 16:44 UTCEG score recompute
  75. 2026-05-20 16:44 UTCGHSA enrichment

Frequently asked(5)

What is CVE-2026-6607?
CVE-2026-6607 is a medium vulnerability published on April 20, 2026. A security vulnerability has been detected in lm-sys fastchat up to 0.2.36. This issue affects the function apigenerate of the component Worker API Endpoint. The manipulation leads to resource consumption. The attack can be initiated remotely. The exploit has been disclosed publicly and may be…
When was CVE-2026-6607 disclosed?
CVE-2026-6607 was first published in the National Vulnerability Database on April 20, 2026, with the most recent update on April 22, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-6607 actively exploited?
CVE-2026-6607 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 46.2% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-6607?
CVE-2026-6607 has a CVSS v3 base score of 5.3 (NVD).
How do I remediate CVE-2026-6607?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-6607, 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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