CVE-2026-61427

HIGHPre-NVD 7.37.3
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

Score 7.3 from GitHub Security Advisory (severity: HIGH) published 2026-10-08. A secondary CVSS source baseline 7.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, a secondary CVSS source
Elevated

Also known asEUVD-2026-44638 (ENISA EUVD) · GHSA-5866-9272-qcfv (GitHub Security Advisories) · GHSA-hc5v-gxvj-58wh (GitHub Security Advisories) · PYSEC-2026-4257 (OSV.dev)Source: ENISA EUVD

7.3EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • CISA's Vulnrichment rates exploitation as PoC; EchelonGraph holds no exploit-code reference for it
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 7.3Exploit: No code on recordExposed services: Not assessed

A fix is available — apply it.

PraisonAI before 4.6.78 exposes the MCP HTTP-stream transport without authentication by default: the CLI --api-key option defaults to None, and the server only enforces Authorization/Bearer checks when an API key is configured. When an operator runs 'praisonai mcp serve --transport http-stream' without an API key, an unauthenticated client (no Authorization header, and no Origin header, which is also permitted) can initialize a session, enumerate the available tools (tools/list), and invoke tools (tools/call). Additionally, the dispatcher forwards tool-call arguments to handlers without validating them against the advertised inputSchema. The server binds to 127.0.0.1 by default, so remote exploitation requires the operator to bind to a network-accessible address (e.g., --host 0.0.0.0).

CVSS v3
7.3
EG Score
7.3HIGHmedium confidence
EG Risk
64
EG Risk 64/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity73% × 45%
Impact severity (EG Severity): CVSS 7.3 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation40% × 40%
EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.
Automatability100% × 15%
CISA's SSVC Automatable value: yes (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).
Exploitation public PoC (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
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
0.4%
EPSS %ILE
37th
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (7.3): severity, escalated by confirmed exploitation. This CVE's 7.3 is its impact severity (EG Severity), not escalated.

EG Severity
7.3 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.4% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-11-07). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at low or medium mission impact; Attend at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; 60 days if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track 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). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; 60 days if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

July 15, 2026

Last Modified

October 24, 2026

Advisory Details (2)

Auto-updated Jul 15, 2026
Patch available. Sources: github.
Web page

PraisonAI before 4.6.78 Authentication Bypass via HTTP-stream | Advisories | VulnCheck

https://www.vulncheck.com/advisories/praisonai-before-authentication-bypass-via-http-stream
GitHub advisoryMentions a patch (unverified)

MCP HTTP-stream transport is unauthenticated by default, exposing tool enumeration and an unvalidated tool-call surface · Advisory · MervinPraison/PraisonAI · GitHub

https://github.com/MervinPraison/PraisonAI/security/advisories/GHSA-hc5v-gxvj-58wh

Vendor Advisories for CVE-2026-61427(1)

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 / EcosystemFix (by version range) / PatchReleasedSource
pippraisonai @ 4.6.78 (fixes <= 4.6.77)—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 rangeFix by version rangeDependents
praisonai0.0.1 ... 4.6.9 (763 versions)
  • every version up to 4.6.78: fixed in 4.6.78
—

Weakness Classification(3)

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

Data Freshness Timeline

(refreshed 8× in last 7d / 33× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed its CVE.org record (CNA or CISA ADP). An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). "EchelonGraph re-scored" is our own recompute of this CVE's score, not an update from a source, and is not counted in the refreshes above. Most recent first.

Showing the most recent 100 of 260 rows on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 160 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-12 16:34 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  2. 2026-11-11 16:40 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  3. 2026-11-10 16:45 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  4. 2026-11-09 16:35 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  5. 2026-11-08 16:40 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  6. 2026-11-07 22:00 UTCEchelonGraph re-scored
  7. 2026-11-07 22:00 UTCGHSA enrichmentGHSA-hc5v-gxvj-58wh · GitHub severity HIGH · GitHub CVSS 7.3
  8. 2026-11-07 16:39 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  9. 2026-11-06 16:39 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  10. 2026-11-05 16:38 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  11. 2026-11-04 16:36 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  12. 2026-11-04 03:31 UTCEchelonGraph re-scored
  13. 2026-11-04 03:31 UTCGHSA enrichmentGHSA-hc5v-gxvj-58wh · GitHub severity HIGH · GitHub CVSS 7.3
  14. 2026-11-03 16:48 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  15. 2026-11-02 16:45 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  16. 2026-11-01 16:35 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  17. 2026-11-01 07:41 UTCGHSA enrichmentGHSA-hc5v-gxvj-58wh · GitHub severity HIGH · GitHub CVSS 7.3
  18. 2026-11-01 07:41 UTCEchelonGraph re-scored
  19. 2026-10-31 16:33 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  20. 2026-10-30 16:34 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  21. 2026-10-29 16:33 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  22. 2026-10-28 16:32 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  23. 2026-10-27 21:04 UTCEchelonGraph re-scored
  24. 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  25. 2026-10-26 16:32 UTCEPSS rescoreEPSS 0.4% · 36th percentile
Show 75 more
  1. 2026-10-25 16:33 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  2. 2026-10-25 14:14 UTCEchelonGraph re-scored
  3. 2026-10-24 21:26 UTCEchelonGraph re-scored
  4. 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  5. 2026-10-23 16:32 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  6. 2026-10-22 16:35 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  7. 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  8. 2026-10-20 19:51 UTCEchelonGraph re-scored
  9. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  10. 2026-10-19 16:32 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  11. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  12. 2026-10-18 03:25 UTCEchelonGraph re-scored
  13. 2026-10-17 16:35 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  14. 2026-10-16 16:43 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  15. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  16. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  17. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  18. 2026-10-13 13:25 UTCEchelonGraph re-scored
  19. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  20. 2026-10-12 15:50 UTCEchelonGraph re-scored
  21. 2026-10-11 19:34 UTCEchelonGraph re-scored
  22. 2026-10-11 16:49 UTCEchelonGraph re-scored
  23. 2026-10-11 14:11 UTCEchelonGraph re-scored
  24. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  25. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  26. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  27. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  28. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  29. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  30. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  31. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  32. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  33. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  34. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  35. 2026-10-01 12:42 UTCEchelonGraph re-scored
  36. 2026-10-01 12:42 UTCGHSA enrichmentGHSA-5866-9272-qcfv · GitHub CVSS 7.3
  37. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  38. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  39. 2026-09-28 08:47 UTCEchelonGraph re-scored
  40. 2026-09-28 08:47 UTCGHSA enrichmentGHSA-5866-9272-qcfv · GitHub CVSS 7.3
  41. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  42. 2026-09-24 08:54 UTCEchelonGraph re-scored
  43. 2026-09-24 08:54 UTCGHSA enrichmentGHSA-5866-9272-qcfv · GitHub CVSS 7.3
  44. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  45. 2026-09-23 03:22 UTCEchelonGraph re-scored
  46. 2026-09-23 03:22 UTCGHSA enrichmentGHSA-5866-9272-qcfv · GitHub CVSS 7.3
  47. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  48. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  49. 2026-09-18 04:47 UTCEchelonGraph re-scored
  50. 2026-09-18 04:47 UTCGHSA enrichmentGHSA-5866-9272-qcfv · GitHub CVSS 7.3
  51. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  52. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  53. 2026-09-14 10:27 UTCGHSA enrichmentGHSA-5866-9272-qcfv · GitHub CVSS 7.3
  54. 2026-09-13 23:13 UTCEchelonGraph re-scored
  55. 2026-09-13 23:13 UTCGHSA enrichmentGHSA-5866-9272-qcfv · GitHub CVSS 7.3
  56. 2026-09-13 07:17 UTCEchelonGraph re-scored
  57. 2026-09-13 07:17 UTCGHSA enrichmentGHSA-5866-9272-qcfv · GitHub CVSS 7.3
  58. 2026-09-12 13:05 UTCGHSA enrichmentGHSA-5866-9272-qcfv · GitHub CVSS 7.3
  59. 2026-09-11 21:47 UTCEchelonGraph re-scored
  60. 2026-09-11 21:47 UTCGHSA enrichmentGHSA-5866-9272-qcfv · GitHub CVSS 7.3
  61. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  62. 2026-09-11 09:37 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  63. 2026-09-10 09:35 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  64. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  65. 2026-09-08 00:57 UTCEchelonGraph re-scored
  66. 2026-09-08 00:57 UTCGHSA enrichmentGHSA-5866-9272-qcfv · GitHub CVSS 7.3
  67. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  68. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  69. 2026-09-06 13:29 UTCGHSA enrichmentGHSA-5866-9272-qcfv · GitHub CVSS 7.3
  70. 2026-09-05 20:52 UTCEchelonGraph re-scored
  71. 2026-09-05 20:52 UTCGHSA enrichmentGHSA-5866-9272-qcfv · GitHub CVSS 7.3
  72. 2026-09-04 05:07 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  73. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  74. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  75. 2026-09-01 04:40 UTCEPSS rescoreEPSS 0.4% · 31st percentile

Frequently asked(5)

What is CVE-2026-61427?
CVE-2026-61427 is a high-severity vulnerability; its CVE record was published on July 15, 2026. PraisonAI before 4.6.78 exposes the MCP HTTP-stream transport without authentication by default: the CLI --api-key option defaults to None, and the server only enforces Authorization/Bearer checks when an API key is configured. When an operator runs 'praisonai mcp serve --transport http-stream'…
When was CVE-2026-61427 made public?
CVE-2026-61427 was made public on June 25, 2026: that is the date its CVE record's CNA, VulnCheck, gives for when the vulnerability was made public. The CVE record itself was published on July 15, 2026. EchelonGraph's copy of the record carries a last-modified date of October 24, 2026; the record at its source may have been updated since.
Is CVE-2026-61427 actively exploited?
CVE-2026-61427 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (37th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-61427?
CVE-2026-61427 has a CVSS base score of 7.3 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-61427?
A fix for CVE-2026-61427 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-61427 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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