CVE-2026-55528

HIGHPre-NVD 8.28.2
EchelonGraph scoreMEDIUM confidence

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

This high-severity CVE scores 8.2 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.5% (40th percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from a secondary CVSS source
Sources: EPSS, a secondary CVSS source
Elevated
8.2EG
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: 0.5%CVSS: 8.2Exploit: No code on recordExposed services: Not assessed

A fix is available — apply it.

PraisonAI is a multi-agent teams system. Prior to praisonaiagents 1.6.58, AgentServer exposes ServerConfig.auth_token but AgentServer._create_app does not check it on any route. A remote caller can subscribe, publish, and perform other actions without a valid bearer token or X-Auth-Token even when authentication is configured. This issue is fixed in version 1.6.58.

CVSS v3
8.2
EG Score
8.2HIGHmedium confidence
EG Risk
68
EG Risk 68/100

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 (value × EchelonGraph’s weight)
Severity82% × 45%
The EG Score, 8.2 of 10.
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
0.5%
EPSS %ILE
40th
KEV
Not listed

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.

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

August 25, 2026

Last Modified

September 9, 2026

Advisory Details (3)

Auto-updated Aug 25, 2026
Patch available. Sources: github, github_commit, github_release.
GitHub release Patch Available

PraisonAI v4.6.58

Patch available: MervinPraison/PraisonAI v4.6.58

https://github.com/MervinPraison/PraisonAI/releases/tag/v4.6.58
GitHub commit Patch Available

commit 2f9677abb2ea (MervinPraison/PraisonAI)

Patch available: MervinPraison/PraisonAI v4.6.137 (contains commit 2f9677abb2ea)

https://github.com/MervinPraison/PraisonAI/commit/2f9677abb2ea68eab864ee8b6a828fd0141612e1
GitHub advisoryMentions a patch (unverified)

praisonaiagents: AgentServer declares auth_token but never enforces it on any route (CWE-862) · Advisory · MervinPraison/PraisonAI · GitHub

https://github.com/MervinPraison/PraisonAI/security/advisories/GHSA-7g3p-92qq-8wvh

Vendor Advisories for CVE-2026-55528(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 rangeFix by version rangeDependents
praisonaiagents0.0.1 ... 1.6.9 (585 versions)
  • every version up to 1.6.58: fixed in 1.6.58
—

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 14× in last 7d / 56× 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 it from the CNA feed. 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). Most recent first.

  1. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  2. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  3. 2026-10-12 15:55 UTCEG score recompute
  4. 2026-10-11 19:39 UTCEG score recompute
  5. 2026-10-11 16:54 UTCEG score recompute
  6. 2026-10-11 14:17 UTCEG score recompute
  7. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  8. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  9. 2026-10-10 12:05 UTCEG score recompute
  10. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  11. 2026-10-09 04:24 UTCEG score recompute
  12. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  13. 2026-10-08 03:18 UTCEG score recompute
  14. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  15. 2026-10-06 19:19 UTCEG score recompute
  16. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  17. 2026-10-05 19:08 UTCEG score recompute
  18. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  19. 2026-10-05 07:32 UTCEG score recompute
  20. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  21. 2026-10-03 19:23 UTCEG score recompute
  22. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  23. 2026-10-02 19:35 UTCEG score recompute
  24. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  25. 2026-10-01 20:13 UTCEG score recompute
Show 65 more
  1. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  2. 2026-09-30 20:15 UTCEG score recompute
  3. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  4. 2026-09-30 06:49 UTCEG score recompute
  5. 2026-09-29 15:22 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  6. 2026-09-29 14:37 UTCEG score recompute
  7. 2026-09-28 21:30 UTCEG score recompute
  8. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  9. 2026-09-27 21:18 UTCEG score recompute
  10. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  11. 2026-09-26 22:06 UTCEG score recompute
  12. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  13. 2026-09-24 18:51 UTCEG score recompute
  14. 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  15. 2026-09-23 18:16 UTCEG score recompute
  16. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  17. 2026-09-22 19:04 UTCEG score recompute
  18. 2026-09-22 07:11 UTCEG score recompute
  19. 2026-09-20 20:17 UTCEG score recompute
  20. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  21. 2026-09-19 20:46 UTCEG score recompute
  22. 2026-09-18 21:34 UTCEG score recompute
  23. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  24. 2026-09-17 21:09 UTCEG score recompute
  25. 2026-09-17 19:31 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  26. 2026-09-16 19:26 UTCEG score recompute
  27. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  28. 2026-09-16 06:20 UTCEG score recompute
  29. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  30. 2026-09-15 06:35 UTCEG score recompute
  31. 2026-09-15 03:11 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  32. 2026-09-13 18:38 UTCEG score recompute
  33. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  34. 2026-09-12 19:26 UTCEG score recompute
  35. 2026-09-11 20:12 UTCEG score recompute
  36. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  37. 2026-09-10 20:40 UTCEG score recompute
  38. 2026-09-10 09:35 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  39. 2026-09-09 01:15 UTCEG score recompute
  40. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  41. 2026-09-07 01:20 UTCEG score recompute
  42. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  43. 2026-09-06 02:07 UTCEG score recompute
  44. 2026-09-04 15:14 UTCEG score recompute
  45. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  46. 2026-09-02 16:27 UTCEG score recompute
  47. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  48. 2026-09-01 17:07 UTCEG score recompute
  49. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  50. 2026-09-01 05:17 UTCEG score recompute
  51. 2026-09-01 04:40 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  52. 2026-08-31 04:19 UTCEG score recompute
  53. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  54. 2026-08-30 05:07 UTCEG score recompute
  55. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  56. 2026-08-29 05:11 UTCEG score recompute
  57. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  58. 2026-08-27 18:18 UTCEG score recompute
  59. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  60. 2026-08-26 18:38 UTCEG score recompute
  61. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  62. 2026-08-25 19:21 UTCEG score recompute
  63. 2026-08-25 18:31 UTCEG score recompute
  64. 2026-08-25 15:21 UTCEG score recompute
  65. 2026-08-25 14:44 UTCEG score recomputeFirst assessed: 8.2 HIGH

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2026-55528?
CVE-2026-55528 is a high-severity vulnerability; its CVE record was published on August 25, 2026. PraisonAI is a multi-agent teams system. Prior to praisonaiagents 1.6.58, AgentServer exposes ServerConfig.authtoken but AgentServer.create_app does not check it on any route. A remote caller can subscribe, publish, and perform other actions without a valid bearer token or X-Auth-Token even when…
When was the CVE record for CVE-2026-55528 published?
The CVE record for CVE-2026-55528 was published on August 25, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of September 9, 2026; the record at its source may have been updated since.
Is CVE-2026-55528 actively exploited?
CVE-2026-55528 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (40th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-55528?
CVE-2026-55528 has a CVSS base score of 8.2 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-55528?
A fix for CVE-2026-55528 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-55528 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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