Vulnerability-Lookup

CVE-2026-18990 (GCVE-0-2026-18990)

Vulnerability from cvelistv5 – Published: 2026-08-06 02:15 – Updated: 2026-08-06 17:32

Title

letta-ai LettaBot API Status Route server.ts missing authentication

Summary

A vulnerability was detected in letta-ai LettaBot 0.2.0. Impacted is an unknown function of the file src/api/server.ts of the component API Status Route. The manipulation results in missing authentication. The attack may be performed from remote. The exploit is now public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

Severity

6.9 (Medium)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P

7.3 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R

7.3 (High)


                        
                          CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R

SSVC

Exploitation: poc Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-06 17:30 UTC

CWE

CWE-306 - Missing Authentication
CWE-287 - Improper Authentication

Assigner

VulDB

References

6 references

URL	Tags
https://vuldb.com/vuln/386359	vdb-entry
https://vuldb.com/vuln/386359/cti	signaturepermissions-required
https://vuldb.com/cve/CVE-2026-18990	third-party-advisory
https://vuldb.com/submit/862562	third-party-advisory
https://vuldb.com/submit/862622	third-party-advisory
https://gist.github.com/YLChen-007/2ba2e586f3d16c…	exploit

Impacted products

1 product

Vendor	Product	Version
letta-ai	LettaBot	Affected: 0.2.0 cpe:2.3:a:letta-ai:lettabot::::::::

Credits

JohnChen (VulDB User) VulDB CNA Team

Show details on NVD website

JSON

To clipboard

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    "dateReserved": "2026-08-05T18:44:22.650Z",
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    "state": "PUBLISHED"
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}

GHSA-C8V3-2W4M-9Q57

Vulnerability from github – Published: 2026-08-06 03:31 – Updated: 2026-08-06 03:31

Details

Severity

7.3 (High)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

5.5 (Medium)


                  
                    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-18990"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-287"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-06T03:16:20Z",
    "severity": "MODERATE"
  },
  "details": "A vulnerability was detected in letta-ai LettaBot 0.2.0. Impacted is an unknown function of the file src/api/server.ts of the component API Status Route. The manipulation results in missing authentication. The attack may be performed from remote. The exploit is now public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.",
  "id": "GHSA-c8v3-2w4m-9q57",
  "modified": "2026-08-06T03:31:14Z",
  "published": "2026-08-06T03:31:13Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-18990"
    },
    {
      "type": "WEB",
      "url": "https://gist.github.com/YLChen-007/2ba2e586f3d16cb368c8dcd6ef680178"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/cve/CVE-2026-18990"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/submit/862562"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/submit/862622"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/vuln/386359"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/vuln/386359/cti"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.

Action not permitted

CVE-2026-18990 (GCVE-0-2026-18990)

GHSA-C8V3-2W4M-9Q57

Tags

Sightings

Nomenclature