Vulnerability-Lookup

Vulnerability from bitnami_vulndb

Published

2026-05-28 11:26

Modified

2026-05-28 11:48

Summary

Prometheus: Stored XSS via crafted histogram bucket label values in the heatmap display of the old Prometheus web UI

Details

Prometheus is an open-source monitoring system and time series database. From 2.49.0 to before 3.5.3 and 3.11.3, in the Prometheus server's legacy web UI (enabled via the command-line flag --enable-feature=old-ui), the histogram heatmap chart view does not escape le label values when inserting them into the HTML for use as axis tick mark labels. An attacker who can inject crafted metrics can execute JavaScript in the browser of any Prometheus user who views the metric in the heatmap chart UI. This vulnerability is fixed in 3.5.3 and 3.11.3.

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "Bitnami",
        "name": "prometheus",
        "purl": "pkg:bitnami/prometheus"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.49.0"
            },
            {
              "fixed": "3.5.3"
            },
            {
              "introduced": "3.6.0"
            },
            {
              "fixed": "3.11.3"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "severity": [
        {
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/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"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-44903"
  ],
  "database_specific": {
    "cpes": [
      "cpe:2.3:a:prometheus:prometheus:*:*:*:*:*:go:*:*"
    ],
    "severity": "Medium"
  },
  "details": "Prometheus is an open-source monitoring system and time series database. From 2.49.0 to before 3.5.3 and 3.11.3, in the Prometheus server\u0027s legacy web UI (enabled via the command-line flag --enable-feature=old-ui), the histogram heatmap chart view does not escape le label values when inserting them into the HTML for use as axis tick mark labels. An attacker who can inject crafted metrics can execute JavaScript in the browser of any Prometheus user who views the metric in the heatmap chart UI. This vulnerability is fixed in 3.5.3 and 3.11.3.",
  "id": "BIT-prometheus-2026-44903",
  "modified": "2026-05-28T11:48:30.090Z",
  "published": "2026-05-28T11:26:41.321Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/prometheus/prometheus/commit/38f23b9075ced1de2b82d2dad8b2bebb1ecd5b7d"
    },
    {
      "type": "WEB",
      "url": "https://github.com/prometheus/prometheus/security/advisories/GHSA-fw8g-cg8f-9j28"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-44903"
    }
  ],
  "schema_version": "1.6.2",
  "summary": "Prometheus: Stored XSS via crafted histogram bucket label values in the heatmap display of the old Prometheus web UI"
}

CVE-2026-44903 (GCVE-0-2026-44903)

Vulnerability from cvelistv5 – Published: 2026-05-26 21:27 – Updated: 2026-05-27 14:20

Title

Prometheus: Stored XSS via crafted histogram bucket label values in the heatmap display of the old Prometheus web UI

Summary

Severity

5.1 (Medium)


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

CWE

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

Assigner

GitHub_M

References

2 references

URL	Tags
https://github.com/prometheus/prometheus/security…	x_refsource_CONFIRM
https://github.com/prometheus/prometheus/commit/3…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
prometheus	prometheus	Affected: >= 2.49.0, < 3.5.3 Affected: >= 3.6.0-rc.0, < 3.11.3

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-44903",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-05-27T14:19:11.558921Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-05-27T14:20:35.919Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "prometheus",
          "vendor": "prometheus",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 2.49.0, \u003c 3.5.3"
            },
            {
              "status": "affected",
              "version": "\u003e= 3.6.0-rc.0, \u003c 3.11.3"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Prometheus is an open-source monitoring system and time series database. From 2.49.0 to before 3.5.3 and 3.11.3, in the Prometheus server\u0027s legacy web UI (enabled via the command-line flag --enable-feature=old-ui), the histogram heatmap chart view does not escape le label values when inserting them into the HTML for use as axis tick mark labels. An attacker who can inject crafted metrics can execute JavaScript in the browser of any Prometheus user who views the metric in the heatmap chart UI. This vulnerability is fixed in 3.5.3 and 3.11.3."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 5.1,
            "baseSeverity": "MEDIUM",
            "privilegesRequired": "LOW",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "LOW",
            "subIntegrityImpact": "LOW",
            "userInteraction": "PASSIVE",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "NONE",
            "vulnConfidentialityImpact": "NONE",
            "vulnIntegrityImpact": "NONE"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-79",
              "description": "CWE-79: Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-26T21:27:18.597Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/prometheus/prometheus/security/advisories/GHSA-fw8g-cg8f-9j28",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/prometheus/prometheus/security/advisories/GHSA-fw8g-cg8f-9j28"
        },
        {
          "name": "https://github.com/prometheus/prometheus/commit/38f23b9075ced1de2b82d2dad8b2bebb1ecd5b7d",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/prometheus/prometheus/commit/38f23b9075ced1de2b82d2dad8b2bebb1ecd5b7d"
        }
      ],
      "source": {
        "advisory": "GHSA-fw8g-cg8f-9j28",
        "discovery": "UNKNOWN"
      },
      "title": "Prometheus: Stored XSS via crafted histogram bucket label values in the heatmap display of the old Prometheus web UI"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-44903",
    "datePublished": "2026-05-26T21:27:18.597Z",
    "dateReserved": "2026-05-07T21:50:33.547Z",
    "dateUpdated": "2026-05-27T14:20:35.919Z",
    "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.

Action not permitted

Vulnerability from bitnami_vulndb

CVE-2026-44903 (GCVE-0-2026-44903)

Tags

Sightings

Nomenclature