Vulnerability-Lookup

GHSA-Q23M-VM9R-5745

Vulnerability from github – Published: 2026-05-14 15:31 – Updated: 2026-05-20 15:48

Summary

podinfo: cross-site scripting vulnerability in the /echo and /api/echo endpoints

Details

podinfo through 6.11.2 contains a reflected cross-site scripting vulnerability in the /echo and /api/echo endpoints where the echoHandler writes request body content directly to the response without setting explicit Content-Type or X-Content-Type-Options headers. Attackers can craft cross-origin HTML pages with auto-submitting forms containing script payloads in the request body, which are served as text/html due to Go's content type detection, allowing the reflected script to execute in the podinfo origin context when victims visit the attacker's page.

Severity

5.4 (Medium)


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

5.1 (Medium)


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

Show details on source website

JSON

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{
  "affected": [
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/stefanprodan/podinfo"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.8.1-0.20260519111337-cbebb20fd485"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-43644"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-79"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-05-20T15:48:00Z",
    "nvd_published_at": "2026-05-14T13:16:18Z",
    "severity": "MODERATE"
  },
  "details": "podinfo through 6.11.2 contains a reflected cross-site scripting vulnerability in the /echo and /api/echo endpoints where the echoHandler writes request body content directly to the response without setting explicit Content-Type or X-Content-Type-Options headers. Attackers can craft cross-origin HTML pages with auto-submitting forms containing script payloads in the request body, which are served as text/html due to Go\u0027s content type detection, allowing the reflected script to execute in the podinfo origin context when victims visit the attacker\u0027s page.",
  "id": "GHSA-q23m-vm9r-5745",
  "modified": "2026-05-20T15:48:00Z",
  "published": "2026-05-14T15:31:58Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43644"
    },
    {
      "type": "WEB",
      "url": "https://github.com/stefanprodan/podinfo/issues/474"
    },
    {
      "type": "WEB",
      "url": "https://github.com/stefanprodan/podinfo/pull/480"
    },
    {
      "type": "WEB",
      "url": "https://github.com/stefanprodan/podinfo/commit/cbebb20fd48588d36fc7ff3e874c128eb89692f4"
    },
    {
      "type": "WEB",
      "url": "https://github.com/Niccolo10/Security-Advisories/blob/main/CVE-2026-43644/cve-2026-43644.md"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/stefanprodan/podinfo"
    },
    {
      "type": "WEB",
      "url": "https://github.com/stefanprodan/podinfo/releases/tag/6.12.0"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/podinfo-reflected-xss-via-echo-endpoint"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "podinfo: cross-site scripting vulnerability in the /echo and /api/echo endpoints"
}

CVE-2026-43644 (GCVE-0-2026-43644)

Vulnerability from cvelistv5 – Published: 2026-05-14 12:37 – Updated: 2026-07-14 20:01 X_Open Source

Title

podinfo 6.11.2 Reflected XSS via /echo Endpoint

Summary

Severity

5.1 (Medium)


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

5.4 (Medium)


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

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-05-14 13:46 UTC

CWE

CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Assigner

VulnCheck mitre root

References

3 references

URL	Tags
https://github.com/Niccolo10/Security-Advisories/…	technical-descriptionexploit
https://github.com/stefanprodan/podinfo/issues/474	issue-tracking
https://www.vulncheck.com/advisories/podinfo-refl…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
stefanprodan	podinfo	Affected: 0 , ≤ 6.11.2 (semver) cpe:2.3:a:stefanprodan:podinfo::::::kubernetes::*

Date Public

2026-05-14 00:00

Credits

Niccolò Parlanti

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-43644",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-05-14T13:46:17.355351Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
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        "providerMetadata": {
          "dateUpdated": "2026-05-14T13:46:25.985Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "affected",
          "packageURL": "pkg:github/stefanprodan/podinfo",
          "product": "podinfo",
          "repo": "https://github.com/stefanprodan/podinfo",
          "vendor": "stefanprodan",
          "versions": [
            {
              "lessThanOrEqual": "6.11.2",
              "status": "affected",
              "version": "0",
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            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:a:stefanprodan:podinfo:*:*:*:*:*:kubernetes:*:*",
                  "versionEndIncluding": "6.11.2",
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                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
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      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
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        }
      ],
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          "lang": "en",
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        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "Automatable": "NOT_DEFINED",
            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "LOW",
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            "baseScore": 5.1,
            "baseSeverity": "MEDIUM",
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            "providerUrgency": "NOT_DEFINED",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "LOW",
            "subIntegrityImpact": "LOW",
            "userInteraction": "ACTIVE",
            "valueDensity": "NOT_DEFINED",
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            "vulnConfidentialityImpact": "NONE",
            "vulnIntegrityImpact": "NONE",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
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          "scenarios": [
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            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N",
            "version": "3.1"
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          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-79",
              "description": "Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)",
              "lang": "en",
              "type": "CWE"
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          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-14T20:01:13.990Z",
        "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
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      "references": [
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        },
        {
          "tags": [
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          ],
          "url": "https://github.com/stefanprodan/podinfo/issues/474"
        },
        {
          "tags": [
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          ],
          "url": "https://www.vulncheck.com/advisories/podinfo-reflected-xss-via-echo-endpoint"
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      ],
      "source": {
        "discovery": "EXTERNAL"
      },
      "tags": [
        "x_open-source"
      ],
      "title": "podinfo 6.11.2 Reflected XSS via /echo Endpoint",
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      }
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  },
  "cveMetadata": {
    "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
    "assignerShortName": "VulnCheck",
    "cveId": "CVE-2026-43644",
    "datePublished": "2026-05-14T12:37:40.408Z",
    "dateReserved": "2026-05-01T18:22:45.643Z",
    "dateUpdated": "2026-07-14T20:01:13.990Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.