Vulnerability-Lookup

GHSA-WWWW-X39F-GRJC

Vulnerability from github – Published: 2026-09-14 21:31 – Updated: 2026-09-14 21:31

Details

A weakness has been identified in a2aproject a2a-java 1.2.0. The affected element is the function BasePushNotificationSender.dispatchNotification of the file server-common/src/main/java/org/a2aproject/sdk/server/tasks/BasePushNotificationSender.java of the component Authorization Header Construction. This manipulation causes http response splitting. The attack can be initiated remotely. Upgrading to version 1.3.0 is sufficient to fix this issue. Patch name: 247a655043f145f6f8e3853724b6a543eaa02001. You should upgrade the affected component.

Severity

7.3 (High)


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

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

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{
  "affected": [],
  "aliases": [
    "CVE-2026-90819"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-93"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-14T21:17:42Z",
    "severity": "MODERATE"
  },
  "details": "A weakness has been identified in a2aproject a2a-java 1.2.0. The affected element is the function BasePushNotificationSender.dispatchNotification of the file server-common/src/main/java/org/a2aproject/sdk/server/tasks/BasePushNotificationSender.java of the component Authorization Header Construction. This manipulation causes http response splitting. The attack can be initiated remotely. Upgrading to version 1.3.0 is sufficient to fix this issue. Patch name: 247a655043f145f6f8e3853724b6a543eaa02001. You should upgrade the affected component.",
  "id": "GHSA-wwww-x39f-grjc",
  "modified": "2026-09-14T21:31:57Z",
  "published": "2026-09-14T21:31:56Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-90819"
    },
    {
      "type": "WEB",
      "url": "https://github.com/a2aproject/a2a-java/pull/1043"
    },
    {
      "type": "WEB",
      "url": "https://github.com/a2aproject/a2a-java/pull/1053"
    },
    {
      "type": "WEB",
      "url": "https://github.com/a2aproject/a2a-java/commit/247a655043f145f6f8e3853724b6a543eaa02001"
    },
    {
      "type": "WEB",
      "url": "https://github.com/a2aproject/a2a-java"
    },
    {
      "type": "WEB",
      "url": "https://github.com/a2aproject/a2a-java/releases/tag/v1.3.0.Final"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/cve/CVE-2026-90819"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/submit/922996"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/vuln/403322"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/vuln/403322/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: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"
    }
  ]
}

CVE-2026-90819 (GCVE-0-2026-90819)

Vulnerability from cvelistv5 – Published: 2026-09-14 20:30 – Updated: 2026-09-15 14:25 X_Open Source

Title

a2aproject a2a-java Authorization Header Construction BasePushNotificationSender.java BasePushNotificationSender.dispatchNotification response splitting

Summary

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:X

7.3 (High)


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

7.3 (High)


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

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-15 14:25 UTC

CWE

CWE-113 - HTTP Response Splitting
CWE-93 - CRLF Injection

Assigner

VulDB mitre root

References

9 references

URL	Tags
https://vuldb.com/vuln/403322	vdb-entrytechnical-description
https://vuldb.com/vuln/403322/cti	signaturepermissions-required
https://vuldb.com/cve/CVE-2026-90819	third-party-advisory
https://vuldb.com/submit/922996	third-party-advisory
https://github.com/a2aproject/a2a-java/pull/1043	issue-trackingpatch
https://github.com/a2aproject/a2a-java/pull/1053	issue-trackingpatch
https://github.com/a2aproject/a2a-java/commit/247…	patch
https://github.com/a2aproject/a2a-java/releases/t…	patch
https://github.com/a2aproject/a2a-java/	product

Impacted products

1 product

Vendor	Product	Version
a2aproject	a2a-java	Affected: 1.2.0 Unaffected: 1.3.0 cpe:2.3:a:a2aproject:a2a-java::::::::

Credits

ez-lbz (VulDB User)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
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        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-90819",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-09-15T14:25:29.392033Z",
                "version": "2.0.3"
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        "providerMetadata": {
          "dateUpdated": "2026-09-15T14:25:39.139Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
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    ],
    "cna": {
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          "cpes": [
            "cpe:2.3:a:a2aproject:a2a-java:*:*:*:*:*:*:*:*"
          ],
          "modules": [
            "Authorization Header Construction"
          ],
          "product": "a2a-java",
          "vendor": "a2aproject",
          "versions": [
            {
              "status": "affected",
              "version": "1.2.0"
            },
            {
              "status": "unaffected",
              "version": "1.3.0"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "reporter",
          "value": "ez-lbz (VulDB User)"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "A weakness has been identified in a2aproject a2a-java 1.2.0. The affected element is the function BasePushNotificationSender.dispatchNotification of the file server-common/src/main/java/org/a2aproject/sdk/server/tasks/BasePushNotificationSender.java of the component Authorization Header Construction. This manipulation causes http response splitting. The attack can be initiated remotely. Upgrading to version 1.3.0 is sufficient to fix this issue. Patch name: 247a655043f145f6f8e3853724b6a543eaa02001. You should upgrade the affected component."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "baseScore": 6.9,
            "baseSeverity": "MEDIUM",
            "vectorString": "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:X",
            "version": "4.0"
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        },
        {
          "cvssV3_1": {
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            "baseSeverity": "HIGH",
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        },
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          "cvssV3_0": {
            "baseScore": 7.3,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:X/RL:O/RC:C",
            "version": "3.0"
          }
        },
        {
          "cvssV2_0": {
            "baseScore": 7.5,
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            "version": "2.0"
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              "type": "CWE"
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          ]
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        {
          "descriptions": [
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              "lang": "en",
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      "providerMetadata": {
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      "references": [
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          "tags": [
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          ],
          "url": "https://vuldb.com/vuln/403322"
        },
        {
          "name": "VDB-403322 | CTI Indicators (IOB, IOC, IOA)",
          "tags": [
            "signature",
            "permissions-required"
          ],
          "url": "https://vuldb.com/vuln/403322/cti"
        },
        {
          "name": "CVE-2026-90819 | CVE Analysis and Report",
          "tags": [
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          "url": "https://vuldb.com/cve/CVE-2026-90819"
        },
        {
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          "tags": [
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          "url": "https://vuldb.com/submit/922996"
        },
        {
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        },
        {
          "tags": [
            "product"
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          "url": "https://github.com/a2aproject/a2a-java/"
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      ],
      "tags": [
        "x_open-source"
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          "lang": "en",
          "time": "2026-09-13T02:00:00.000Z",
          "value": "VulDB entry created"
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          "lang": "en",
          "time": "2026-09-13T21:06:47.000Z",
          "value": "VulDB entry last update"
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  "cveMetadata": {
    "assignerOrgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
    "assignerShortName": "VulDB",
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    "datePublished": "2026-09-14T20:30:11.624Z",
    "dateReserved": "2026-09-13T19:01:37.271Z",
    "dateUpdated": "2026-09-15T14:25:39.139Z",
    "state": "PUBLISHED"
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  "dataType": "CVE_RECORD",
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}

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.

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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.

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GHSA-WWWW-X39F-GRJC

CVE-2026-90819 (GCVE-0-2026-90819)

Tags

Sightings

Nomenclature

Related by attack behaviour