Vulnerability-Lookup

CVE-2026-88058 (GCVE-0-2026-88058)

Vulnerability from cvelistv5 – Published: 2026-09-10 18:56 – Updated: 2026-09-11 15:14

Title

Angular: SSR XSS via Unescaped Processing Instruction (<?...?>) Nodes in Fallback Raw-Content Elements

Summary

Angular is a development platform for building mobile and desktop web applications using TypeScript/JavaScript and other languages. Prior to 20.3.30, 21.2.22, and 22.1.4, Angular server-side rendering (SSR) in @angular/platform-server serializes ProcessingInstruction DOM nodes inside fallback raw-content elements without escaping matching ancestor closing tags. ProcessingInstruction data escaped greater-than characters but left less-than characters untouched and did not inspect fallback ancestors, so data such as a matching closing tag prematurely terminates noscript, iframe, noembed, or noframes containers. The vulnerable nodes cannot be authored through standard Angular templates; reachability requires application or library code using inject(DOCUMENT).createProcessingInstruction with attacker-controlled data or Renderer2 DOM insertion inside a fallback container. In HTML5 RAWTEXT parsing, the premature close causes subsequent sibling elements to be interpreted as live HTML and enables arbitrary JavaScript execution in a victim's browser. This issue is fixed in versions 20.3.30, 21.2.22, and 22.1.4.

Severity

8.6 (High)


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

SSVC

Exploitation: poc Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-11 15:14 UTC

CWE

CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE-116 - Improper Encoding or Escaping of Output

Assigner

GitHub_M mitre root

References

9 references

URL	Tags
https://github.com/angular/angular/security/advis…	x_refsource_CONFIRM
https://github.com/angular/angular/issues/70146	x_refsource_MISC
https://github.com/angular/angular/commit/73d8bbd…	x_refsource_MISC
https://github.com/angular/angular/commit/89b2056…	x_refsource_MISC
https://github.com/angular/angular/commit/ba3bc47…	x_refsource_MISC
https://github.com/angular/domino/commit/04f987dc…	x_refsource_MISC
https://github.com/angular/angular/releases/tag/v…	x_refsource_MISC
https://github.com/angular/angular/releases/tag/v…	x_refsource_MISC
https://github.com/angular/angular/releases/tag/v22.1.4	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version	CPE status
angular	angular	Affected: <= 19.2.25 Affected: >= 20.0.0, < 20.3.30 Affected: >= 21.0.0, < 21.2.22 Affected: >= 22.0.0, < 22.1.4	guessed

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-88058

Vulnerability from fkie_nvd - Published: 2026-09-10 19:17 - Updated: 2026-09-11 16:17

Severity

8.6 (High) - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

Summary

References

	URL	Tags
	security-advisories@github.com	https://github.com/angular/angular/commit/73d8bbd27cb46495426d4132975a1355b47ad915
	security-advisories@github.com	https://github.com/angular/angular/commit/89b20568dfaee1ec8e0b3bcf1872acdddd2f4fef
	security-advisories@github.com	https://github.com/angular/angular/commit/ba3bc47b20b3d12f5eb141ec9c651373ae4d15e8
	security-advisories@github.com	https://github.com/angular/angular/issues/70146
	security-advisories@github.com	https://github.com/angular/angular/releases/tag/v20.3.30
	security-advisories@github.com	https://github.com/angular/angular/releases/tag/v21.2.22
	security-advisories@github.com	https://github.com/angular/angular/releases/tag/v22.1.4
	security-advisories@github.com	https://github.com/angular/angular/security/advisories/GHSA-j3r3-mxqp-r2p4
	security-advisories@github.com	https://github.com/angular/domino/commit/04f987dc08ff3736b427f50941adf1722458528f
	134c704f-9b21-4f2e-91b3-4a467353bcc0	https://github.com/angular/angular/issues/70146
	134c704f-9b21-4f2e-91b3-4a467353bcc0	https://github.com/angular/angular/security/advisories/GHSA-j3r3-mxqp-r2p4

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "angular",
          "vendor": "angular",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c= 19.2.25"
            },
            {
              "status": "affected",
              "version": "\u003e= 20.0.0, \u003c 20.3.30"
            },
            {
              "status": "affected",
              "version": "\u003e= 21.0.0, \u003c 21.2.22"
            },
            {
              "status": "affected",
              "version": "\u003e= 22.0.0, \u003c 22.1.4"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Angular is a development platform for building mobile and desktop web applications using TypeScript/JavaScript and other languages. Prior to 20.3.30, 21.2.22, and 22.1.4, Angular server-side rendering (SSR) in @angular/platform-server serializes ProcessingInstruction DOM nodes inside fallback raw-content elements without escaping matching ancestor closing tags. ProcessingInstruction data escaped greater-than characters but left less-than characters untouched and did not inspect fallback ancestors, so data such as a matching closing tag prematurely terminates noscript, iframe, noembed, or noframes containers. The vulnerable nodes cannot be authored through standard Angular templates; reachability requires application or library code using inject(DOCUMENT).createProcessingInstruction with attacker-controlled data or Renderer2 DOM insertion inside a fallback container. In HTML5 RAWTEXT parsing, the premature close causes subsequent sibling elements to be interpreted as live HTML and enables arbitrary JavaScript execution in a victim\u0027s browser. This issue is fixed in versions 20.3.30, 21.2.22, and 22.1.4."
    }
  ],
  "id": "CVE-2026-88058",
  "lastModified": "2026-09-11T16:17:48.513",
  "metrics": {
    "cvssMetricV40": [
      {
        "cvssData": {
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "attackComplexity": "LOW",
          "attackRequirements": "NONE",
          "attackVector": "NETWORK",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 8.6,
          "baseSeverity": "HIGH",
          "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": "NONE",
          "providerUrgency": "NOT_DEFINED",
          "subAvailabilityImpact": "NONE",
          "subConfidentialityImpact": "NONE",
          "subIntegrityImpact": "NONE",
          "userInteraction": "PASSIVE",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:N/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": "NONE",
          "vulnConfidentialityImpact": "HIGH",
          "vulnIntegrityImpact": "HIGH",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-88058",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-09-11T15:14:28.505071Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-09-10T19:17:41.800",
  "references": [
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/angular/angular/commit/73d8bbd27cb46495426d4132975a1355b47ad915"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/angular/angular/commit/89b20568dfaee1ec8e0b3bcf1872acdddd2f4fef"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/angular/angular/commit/ba3bc47b20b3d12f5eb141ec9c651373ae4d15e8"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/angular/angular/issues/70146"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/angular/angular/releases/tag/v20.3.30"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/angular/angular/releases/tag/v21.2.22"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/angular/angular/releases/tag/v22.1.4"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/angular/angular/security/advisories/GHSA-j3r3-mxqp-r2p4"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/angular/domino/commit/04f987dc08ff3736b427f50941adf1722458528f"
    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "url": "https://github.com/angular/angular/issues/70146"
    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "url": "https://github.com/angular/angular/security/advisories/GHSA-j3r3-mxqp-r2p4"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Undergoing Analysis",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-79"
        },
        {
          "lang": "en",
          "value": "CWE-116"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}

ubuntu-cve-2026-88058

Vulnerability from osv_ubuntu

Published

2026-09-11 00:00

Modified

2026-09-11 00:00

Summary

Details

(Angular is a development platform for building mobile and desktop web ...)

Severity

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2026-88058	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-88058	REPORT
	https://github.com/angular/angular/security/advis…	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libjs-angularjs",
            "binary_version": "1.2.28-1ubuntu2+esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:16.04:LTS",
        "name": "angular.js",
        "purl": "pkg:deb/ubuntu/angular.js@1.2.28-1ubuntu2+esm1?arch=source\u0026distro=esm-infra/xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.2.28-1ubuntu2",
        "1.2.28-1ubuntu2+esm1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libjs-angularjs",
            "binary_version": "1.5.10-1ubuntu0.1~esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:18.04:LTS",
        "name": "angular.js",
        "purl": "pkg:deb/ubuntu/angular.js@1.5.10-1ubuntu0.1~esm1?arch=source\u0026distro=esm-infra/bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.5.10-1",
        "1.5.10-1ubuntu0.1~esm1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libjs-angularjs",
            "binary_version": "1.7.9-1ubuntu0.1~esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:20.04:LTS",
        "name": "angular.js",
        "purl": "pkg:deb/ubuntu/angular.js@1.7.9-1ubuntu0.1~esm1?arch=source\u0026distro=esm-apps/focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.5.10-1",
        "1.7.9-1",
        "1.7.9-1ubuntu0.1~esm1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libjs-angularjs",
            "binary_version": "1.8.2-2ubuntu0.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "angular.js",
        "purl": "pkg:deb/ubuntu/angular.js@1.8.2-2ubuntu0.1?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.8.2-2",
        "1.8.2-2ubuntu0.1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libjs-angularjs",
            "binary_version": "1.8.3-1ubuntu0.24.04.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "angular.js",
        "purl": "pkg:deb/ubuntu/angular.js@1.8.3-1ubuntu0.24.04.1?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.8.3-1",
        "1.8.3-1ubuntu0.24.04.1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libjs-angularjs",
            "binary_version": "1.8.3-3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "angular.js",
        "purl": "pkg:deb/ubuntu/angular.js@1.8.3-3?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.8.3-3"
      ]
    }
  ],
  "aliases": [],
  "details": "(Angular is a development platform for building mobile and desktop web ...)",
  "id": "UBUNTU-CVE-2026-88058",
  "modified": "2026-09-11T00:00:00Z",
  "published": "2026-09-11T00:00:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-88058"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-88058"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/angular/angular/security/advisories/GHSA-j3r3-mxqp-r2p4"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-88058"
  ]
}

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-2026-88058 (GCVE-0-2026-88058)

FKIE_CVE-2026-88058

ubuntu-cve-2026-88058

Vulnerability from osv_ubuntu

Tags

Sightings

Nomenclature