CVE-2026-73603

MEDIUMNVD 5.35.3—
EchelonGraph scoreMEDIUM confidence

Score 5.3 from GitHub Security Advisory published 2026-08-13. 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
5.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 5.3Exploit: Elevated riskExposed services: Not assessed

A fix is available — apply it.

Flowise before 3.1.4 fails to validate chatflow visibility in the unauthenticated text-to-speech endpoint, allowing attackers to abuse private chatflow TTS credentials. Unauthenticated attackers can generate unlimited text-to-speech audio using stored OpenAI or ElevenLabs API keys by providing a valid chatflow UUID, incurring costs on the chatflow owner's account.

CVSS v3
5.3
EG Score
5.3MEDIUMmedium confidence
EG Risk
55
EG Risk 55/100CISA 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
Severity53% × 45%
Exploitation40% × 40%
Automatability100% × 15%
CISA SSVC: Track at low or medium mission impact; 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
0.3%
EPSS %ILE
23rd
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; 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 public PoC (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). 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

August 13, 2026

Last Modified

September 4, 2026

Advisory Details (2)

Auto-updated Aug 13, 2026
🔬 Proof of concept available. Patch available. Sources: github.
generic

Flowise before 3.1.4 Credential Abuse via Text-to-Speech | Advisories | VulnCheck

https://www.vulncheck.com/advisories/flowise-before-credential-abuse-via-text-to-speech
github Patch Available🟡 PoC Available

Unauthenticated Credential Abuse via Text-to-Speech Endpoint Allows Unauthorized Use of Private Chatflow TTS Credentials · Advisory · FlowiseAI/Flowise · GitHub

https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-8gj2-2cvc-6xx7

Vendor Advisories for CVE-2026-73603(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)
npm(1)
PackageVulnerable rangeFix by version rangeDependents
flowise—
  • every version up to 3.1.4: fixed in 3.1.4
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 12× in last 7d / 67× 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 138 total refreshes for this CVE.

  1. 2026-10-04 23:22 UTCEPSS rescore
  2. 2026-10-04 22:25 UTCGHSA enrichment
  3. 2026-10-03 19:53 UTCEG score recompute
  4. 2026-10-03 19:53 UTCGHSA enrichment
  5. 2026-10-03 14:26 UTCEPSS rescore
  6. 2026-10-02 08:05 UTCEG score recompute
  7. 2026-10-02 08:05 UTCGHSA enrichment
  8. 2026-10-01 19:50 UTCEPSS rescore
  9. 2026-09-30 21:50 UTCEG score recompute
  10. 2026-09-30 21:50 UTCGHSA enrichment
  11. 2026-09-29 15:24 UTCEPSS rescore
  12. 2026-09-28 13:52 UTCEPSS rescore
  13. 2026-09-28 10:49 UTCEG score recompute
  14. 2026-09-28 10:49 UTCGHSA enrichment
  15. 2026-09-27 13:48 UTCEPSS rescore
  16. 2026-09-27 09:49 UTCEG score recompute
  17. 2026-09-27 09:49 UTCGHSA enrichment
  18. 2026-09-26 15:59 UTCEPSS rescore
  19. 2026-09-25 08:33 UTCEG score recompute
  20. 2026-09-25 08:33 UTCGHSA enrichment
  21. 2026-09-24 07:21 UTCEG score recompute
  22. 2026-09-24 07:21 UTCGHSA enrichment
  23. 2026-09-23 17:54 UTCEPSS rescore
  24. 2026-09-23 06:17 UTCEG score recompute
  25. 2026-09-23 06:17 UTCGHSA enrichment
Show 75 more
  1. 2026-09-22 05:22 UTCEG score recompute
  2. 2026-09-22 05:22 UTCGHSA enrichment
  3. 2026-09-21 21:09 UTCEPSS rescore
  4. 2026-09-21 04:21 UTCEG score recompute
  5. 2026-09-21 04:20 UTCGHSA enrichment
  6. 2026-09-20 20:16 UTCEPSS rescore
  7. 2026-09-20 03:00 UTCEG score recompute
  8. 2026-09-20 03:00 UTCGHSA enrichment
  9. 2026-09-19 02:05 UTCEG score recompute
  10. 2026-09-19 02:05 UTCGHSA enrichment
  11. 2026-09-18 19:28 UTCEPSS rescore
  12. 2026-09-18 01:09 UTCEG score recompute
  13. 2026-09-18 01:09 UTCGHSA enrichment
  14. 2026-09-17 00:13 UTCEG score recompute
  15. 2026-09-17 00:13 UTCGHSA enrichment
  16. 2026-09-16 14:08 UTCEPSS rescore
  17. 2026-09-16 05:15 UTCEPSS rescore
  18. 2026-09-15 13:06 UTCEG score recompute
  19. 2026-09-15 13:06 UTCGHSA enrichment
  20. 2026-09-15 03:12 UTCEPSS rescore
  21. 2026-09-14 10:10 UTCEG score recompute
  22. 2026-09-14 10:10 UTCGHSA enrichment
  23. 2026-09-13 09:06 UTCEG score recompute
  24. 2026-09-13 09:06 UTCGHSA enrichment
  25. 2026-09-12 15:02 UTCEPSS rescore
  26. 2026-09-12 08:11 UTCEG score recompute
  27. 2026-09-12 08:11 UTCGHSA enrichment
  28. 2026-09-11 14:53 UTCEPSS rescore
  29. 2026-09-11 07:11 UTCEG score recompute
  30. 2026-09-11 07:11 UTCGHSA enrichment
  31. 2026-09-10 09:35 UTCEPSS rescore
  32. 2026-09-10 06:15 UTCGHSA enrichment
  33. 2026-09-09 05:07 UTCEG score recompute
  34. 2026-09-09 05:07 UTCGHSA enrichment
  35. 2026-09-08 22:01 UTCEPSS rescore
  36. 2026-09-07 22:42 UTCEG score recompute
  37. 2026-09-07 22:42 UTCGHSA enrichment
  38. 2026-09-06 21:47 UTCEG score recompute
  39. 2026-09-06 21:46 UTCGHSA enrichment
  40. 2026-09-06 13:48 UTCEPSS rescore
  41. 2026-09-05 20:50 UTCEG score recompute
  42. 2026-09-05 20:50 UTCGHSA enrichment
  43. 2026-09-04 19:55 UTCEG score recompute▼ 1.00
  44. 2026-09-04 19:55 UTCGHSA enrichment
  45. 2026-09-04 19:49 UTCNVD updateCVSS v3 → 5.3
  46. 2026-09-04 05:07 UTCEPSS rescore
  47. 2026-09-04 01:20 UTCGHSA enrichment
  48. 2026-09-02 23:24 UTCEG score recompute
  49. 2026-09-02 23:24 UTCGHSA enrichment
  50. 2026-09-02 14:12 UTCEPSS rescore
  51. 2026-09-01 21:47 UTCEG score recompute
  52. 2026-09-01 21:47 UTCGHSA enrichment
  53. 2026-09-01 13:54 UTCEPSS rescore
  54. 2026-09-01 04:40 UTCEPSS rescore
  55. 2026-09-01 04:40 UTCEPSS rescore
  56. 2026-08-31 20:34 UTCEG score recompute
  57. 2026-08-31 20:34 UTCGHSA enrichment
  58. 2026-08-30 19:18 UTCEPSS rescore
  59. 2026-08-30 19:17 UTCEPSS rescore
  60. 2026-08-30 16:05 UTCEG score recompute
  61. 2026-08-30 16:05 UTCGHSA enrichment
  62. 2026-08-30 01:22 UTCEPSS rescore
  63. 2026-08-29 15:09 UTCEG score recompute
  64. 2026-08-29 15:09 UTCGHSA enrichment
  65. 2026-08-28 21:42 UTCEPSS rescore
  66. 2026-08-28 11:34 UTCEG score recompute
  67. 2026-08-28 11:34 UTCGHSA enrichment
  68. 2026-08-27 14:25 UTCEPSS rescore
  69. 2026-08-27 10:37 UTCEG score recompute
  70. 2026-08-27 10:37 UTCGHSA enrichment
  71. 2026-08-26 14:47 UTCEPSS rescore
  72. 2026-08-26 09:38 UTCEG score recompute
  73. 2026-08-26 09:38 UTCGHSA enrichment
  74. 2026-08-25 13:49 UTCEPSS rescore
  75. 2026-08-25 08:40 UTCEG score recompute

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2026-73603?
CVE-2026-73603 is a medium vulnerability published on August 13, 2026. Flowise before 3.1.4 fails to validate chatflow visibility in the unauthenticated text-to-speech endpoint, allowing attackers to abuse private chatflow TTS credentials. Unauthenticated attackers can generate unlimited text-to-speech audio using stored OpenAI or ElevenLabs API keys by providing a…
When was CVE-2026-73603 disclosed?
CVE-2026-73603 was first published on August 13, 2026, with the most recent update on September 4, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-73603 actively exploited?
CVE-2026-73603 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (23rd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-73603?
CVE-2026-73603 has a CVSS v3 base score of 5.3 (NVD).
How do I remediate CVE-2026-73603?
A fix for CVE-2026-73603 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-73603 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-73603

Explore →

Is Your Infrastructure Affected by CVE-2026-73603?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Book a Demo →Browse All CVEs