Vulnerability-Lookup

CVE-2026-90790 (GCVE-0-2026-90790)

Vulnerability from cvelistv5 – Published: 2026-09-14 14:30 – Updated: 2026-09-15 13:56

Title

a2aproject a2a-python Push Notification Sender base_push_notification_sender.py _dispatch_notification server-side request forgery

Summary

A security vulnerability has been detected in a2aproject a2a-python up to 1.1.3. This affects the function _dispatch_notification of the file src/a2a/server/tasks/base_push_notification_sender.py of the component Push Notification Sender. The manipulation of the argument push_info.url leads to server-side request forgery. Remote exploitation of the attack is possible. Upgrading to version 1.1.4 is able to mitigate this issue. It is suggested to upgrade the affected component.

Severity

5.3 (Medium)


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

6.3 (Medium)


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

6.3 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-15 13:33 UTC

CWE

CWE-918 - Server-Side Request Forgery

Assigner

VulDB mitre root

References

8 references

URL	Tags
https://vuldb.com/vuln/403296	vdb-entrytechnical-description
https://vuldb.com/vuln/403296/cti	signaturepermissions-required
https://vuldb.com/cve/CVE-2026-90790	third-party-advisory
https://vuldb.com/submit/919747	third-party-advisory
https://github.com/a2aproject/a2a-python/pull/1164	issue-trackingpatch
https://github.com/a2aproject/a2a-python/pull/1169	issue-trackingpatch
https://github.com/a2aproject/a2a-python/releases…	patch
https://github.com/a2aproject/a2a-python/	product

Impacted products

1 product

Vendor	Product	Version	CPE status
a2aproject	a2a-python	Affected: 1.1.0 Affected: 1.1.1 Affected: 1.1.2 Affected: 1.1.3 Unaffected: 1.1.4 cpe:2.3:a:a2aproject:a2a-python::::::::

Credits

ez-lbz (VulDB User)

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-90790

Vulnerability from fkie_nvd - Published: 2026-09-14 15:17 - Updated: 2026-09-15 14:17

Severity

6.3 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

Summary

References

	URL	Tags
	cna@vuldb.com	https://github.com/a2aproject/a2a-python/
	cna@vuldb.com	https://github.com/a2aproject/a2a-python/pull/1164
	cna@vuldb.com	https://github.com/a2aproject/a2a-python/pull/1169
	cna@vuldb.com	https://github.com/a2aproject/a2a-python/releases/tag/v1.1.4
	cna@vuldb.com	https://vuldb.com/cve/CVE-2026-90790
	cna@vuldb.com	https://vuldb.com/submit/919747
	cna@vuldb.com	https://vuldb.com/vuln/403296
	cna@vuldb.com	https://vuldb.com/vuln/403296/cti

Impacted products

	Vendor	Product	Version

JSON

To clipboard

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          "baseScore": 6.5,
          "confidentialityImpact": "PARTIAL",
          "integrityImpact": "PARTIAL",
          "vectorString": "AV:N/AC:L/Au:S/C:P/I:P/A:P",
          "version": "2.0"
        },
        "exploitabilityScore": 8.0,
        "impactScore": 6.4,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "cna@vuldb.com",
        "type": "Secondary",
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "LOW",
          "baseScore": 6.3,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 3.4,
        "source": "cna@vuldb.com",
        "type": "Secondary"
      }
    ],
    "cvssMetricV40": [
      {
        "cvssData": {
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "attackComplexity": "LOW",
          "attackRequirements": "NONE",
          "attackVector": "NETWORK",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 5.3,
          "baseSeverity": "MEDIUM",
          "confidentialityRequirement": "NOT_DEFINED",
          "exploitMaturity": "NOT_DEFINED",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "privilegesRequired": "LOW",
          "providerUrgency": "NOT_DEFINED",
          "subAvailabilityImpact": "NONE",
          "subConfidentialityImpact": "NONE",
          "subIntegrityImpact": "NONE",
          "userInteraction": "NONE",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X/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",
          "version": "4.0",
          "vulnAvailabilityImpact": "LOW",
          "vulnConfidentialityImpact": "LOW",
          "vulnIntegrityImpact": "LOW",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "cna@vuldb.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-90790",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-09-15T13:33:15.907930Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-09-14T15:17:13.200",
  "references": [
    {
      "source": "cna@vuldb.com",
      "url": "https://github.com/a2aproject/a2a-python/"
    },
    {
      "source": "cna@vuldb.com",
      "url": "https://github.com/a2aproject/a2a-python/pull/1164"
    },
    {
      "source": "cna@vuldb.com",
      "url": "https://github.com/a2aproject/a2a-python/pull/1169"
    },
    {
      "source": "cna@vuldb.com",
      "url": "https://github.com/a2aproject/a2a-python/releases/tag/v1.1.4"
    },
    {
      "source": "cna@vuldb.com",
      "url": "https://vuldb.com/cve/CVE-2026-90790"
    },
    {
      "source": "cna@vuldb.com",
      "url": "https://vuldb.com/submit/919747"
    },
    {
      "source": "cna@vuldb.com",
      "url": "https://vuldb.com/vuln/403296"
    },
    {
      "source": "cna@vuldb.com",
      "url": "https://vuldb.com/vuln/403296/cti"
    }
  ],
  "sourceIdentifier": "cna@vuldb.com",
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-918"
        }
      ],
      "source": "cna@vuldb.com",
      "type": "Secondary"
    }
  ]
}

GHSA-33C5-CHM5-2GGP

Vulnerability from github – Published: 2026-09-14 15:32 – Updated: 2026-09-14 15:32

Details

Severity

6.3 (Medium)


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

5.3 (Medium)


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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-90790"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-918"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-14T15:17:13Z",
    "severity": "MODERATE"
  },
  "details": "A security vulnerability has been detected in a2aproject a2a-python up to 1.1.3. This affects the function _dispatch_notification of the file src/a2a/server/tasks/base_push_notification_sender.py of the component Push Notification Sender. The manipulation of the argument push_info.url leads to server-side request forgery. Remote exploitation of the attack is possible. Upgrading to version 1.1.4 is able to mitigate this issue. It is suggested to upgrade the affected component.",
  "id": "GHSA-33c5-chm5-2ggp",
  "modified": "2026-09-14T15:32:49Z",
  "published": "2026-09-14T15:32:49Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-90790"
    },
    {
      "type": "WEB",
      "url": "https://github.com/a2aproject/a2a-python/pull/1164"
    },
    {
      "type": "WEB",
      "url": "https://github.com/a2aproject/a2a-python/pull/1169"
    },
    {
      "type": "WEB",
      "url": "https://github.com/a2aproject/a2a-python"
    },
    {
      "type": "WEB",
      "url": "https://github.com/a2aproject/a2a-python/releases/tag/v1.1.4"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/cve/CVE-2026-90790"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/submit/919747"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/vuln/403296"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/vuln/403296/cti"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X/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.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

CVE-2026-90790 (GCVE-0-2026-90790)

FKIE_CVE-2026-90790

GHSA-33C5-CHM5-2GGP

Tags

Sightings

Nomenclature

Related by attack behaviour