CVE-2026-54283

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.5 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.4%, top 67% 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
Trending — 3 sources updated this week
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.5Exploit: None knownExposed: 0

A fix is available — apply it.

Starlette is a lightweight ASGI framework/toolkit. From 0.4.1 until 1.3.1, request.form() accepts max_fields and max_part_size to bound resource consumption while parsing form data. These limits are enforced for multipart/form-data, but silently ignored for application/x-www-form-urlencoded. An unauthenticated attacker can therefore send a urlencoded body with an arbitrarily large number of fields or an arbitrarily large field, even when the application configured limits it believed would apply. This vulnerability is fixed in 1.3.1.

CVSS v3
7.5
EG Score
7.5(medium)
EG Risk
38(Track)
EG Risk 38/100SSVC: 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
Severity75% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
33%
KEV
Not listed

Published

June 15, 2026

Last Modified

June 26, 2026

Advisory Details (1)

Auto-updated Jun 22, 2026
Patch available. Sources: github.
github Patch Available

request.form() limits silently ignored for application/x-www-form-urlencoded enable DoS · Advisory · Kludex/starlette · GitHub

https://github.com/Kludex/starlette/security/advisories/GHSA-82w8-qh3p-5jfq

Vendor Advisories for CVE-2026-54283(9)

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

Patch Availability(9)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatansible-automation-platform-27/lightspeed-chatbot-rhel9:17854267342026-08-04redhat
redhatansible-automation-platform-26/lightspeed-chatbot-rhel9:17856461882026-08-04redhat
redhatsatellite/iop-advisor-engine-rhel9:17848344022026-07-23redhat
redhatmta/mta-solution-server-rhel9:17841098832026-07-21redhat
redhatansible-automation-platform-26/mcp-tools-rhel9:17839206402026-07-20redhat
redhatansible-automation-platform-27/mcp-tools-rhel9:17839184032026-07-20redhat
redhatrhaiis/vllm-cuda-rhel9:17829510122026-07-06redhat
redhatrhaiis/vllm-rocm-rhel9:17829512442026-07-06redhat
redhatjaeger-main-2.19.0-1.hum12026-06-10redhat

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

(5 across 5 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
starlette0.14.1-1 ... 1.3.1-1 (27 versions)——
Debian:12(1)
PackageVulnerable rangeFixed inDependents
starlette0.26.1-1, 0.26.1-1+deb12u10.26.1-1+deb12u2—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
starlette0.46.1-3 ... 1.3.1-1 (7 versions)——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
starlette0.46.1-3, 0.50.0-1, 1.0.0-1, 1.1.0-1, 1.3.1-1——
PyPI(1)
PackageVulnerable rangeFixed inDependents
starlette0.10.0 ... 1.3.0 (165 versions)1.3.1—

Weakness Classification(1)

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

Additional Vendor Advisories

(1)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 23× in last 7d / 90× 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 151 total refreshes for this CVE.

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

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-54283?
CVE-2026-54283 is a high vulnerability published on June 15, 2026. Starlette is a lightweight ASGI framework/toolkit. From 0.4.1 until 1.3.1, request.form() accepts maxfields and maxpart_size to bound resource consumption while parsing form data. These limits are enforced for multipart/form-data, but silently ignored for application/x-www-form-urlencoded. An…
When was CVE-2026-54283 disclosed?
CVE-2026-54283 was first published in the National Vulnerability Database on June 15, 2026, with the most recent update on June 26, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-54283 actively exploited?
CVE-2026-54283 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 66.8% of all scored CVEs.
What is the CVSS score of CVE-2026-54283?
CVE-2026-54283 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-54283?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-54283, 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

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