{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-72889",
        "assignerOrgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
        "state": "PUBLISHED",
        "assignerShortName": "CPANSec",
        "dateReserved": "2026-08-10T15:44:58.172Z",
        "datePublished": "2026-08-19T07:20:09.095Z",
        "dateUpdated": "2026-08-26T18:03:05.016Z"
    },
    "containers": {
        "cna": {
            "affected": [
                {
                    "collectionURL": "https://cpan.org/modules",
                    "defaultStatus": "unaffected",
                    "modules": [
                        "Net::OAuth"
                    ],
                    "packageName": "Net-OAuth",
                    "packageURL": "pkg:cpan/Net-OAuth",
                    "programFiles": [
                        "lib/Net/OAuth/Message.pm",
                        "lib/Net/OAuth/Request.pm"
                    ],
                    "programRoutines": [
                        {
                            "name": "Net::OAuth::Message::verify"
                        },
                        {
                            "name": "Net::OAuth::Message::_signature_method_class"
                        },
                        {
                            "name": "Net::OAuth::Request::signature_key"
                        }
                    ],
                    "repo": "https://github.com/vurtdev/Net-OAuth",
                    "versions": [
                        {
                            "lessThan": "0.33",
                            "status": "affected",
                            "version": "0",
                            "versionType": "custom"
                        }
                    ]
                }
            ],
            "descriptions": [
                {
                    "lang": "en",
                    "value": "Net::OAuth versions before 0.33 for Perl allow the sender to choose the signature algorithm in verify.\n\nverify resolves the signature method class from the signature_method parameter of the incoming message. signature_method is required on every request, so the algorithm used to check a signature is chosen by whoever sent it, and nothing lets the verifying party pin the method instead. When a message names HMAC-SHA1 or HMAC-SHA256, the key is derived from consumer_secret and token_secret rather than from the key the provider deployed.\n\nA provider deployed on RSA-SHA1 holds only the consumer public key, and RFC 5849 does not use consumer_secret for that method, so the required parameter is filled with a placeholder. A client that names HMAC-SHA1 instead has its signature checked against that placeholder, so a guessable one is enough to forge requests for any consumer key and token."
                }
            ],
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-347",
                            "description": "CWE-347 Improper Verification of Cryptographic Signature",
                            "lang": "en",
                            "type": "CWE"
                        }
                    ]
                },
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-757",
                            "description": "CWE-757 Selection of Less-Secure Algorithm During Negotiation ('Algorithm Downgrade')",
                            "lang": "en",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
                "shortName": "CPANSec",
                "dateUpdated": "2026-08-19T07:20:09.095Z"
            },
            "references": [
                {
                    "tags": [
                        "vendor-advisory"
                    ],
                    "url": "https://github.com/vurtdev/Net-OAuth/security/advisories/GHSA-c8rm-g5cm-4pf5"
                },
                {
                    "tags": [
                        "patch"
                    ],
                    "url": "https://github.com/vurtdev/Net-OAuth/commit/c467adf45c8d77ac4b92ad78b3eebf949252ba7f.patch"
                },
                {
                    "tags": [
                        "release-notes"
                    ],
                    "url": "https://metacpan.org/release/RRWO/Net-OAuth-0.33/changes"
                },
                {
                    "tags": [
                        "technical-description"
                    ],
                    "url": "https://datatracker.ietf.org/doc/html/rfc5849#section-3.4.2"
                },
                {
                    "tags": [
                        "technical-description"
                    ],
                    "url": "https://datatracker.ietf.org/doc/html/rfc5849#section-3.4.3"
                }
            ],
            "solutions": [
                {
                    "lang": "en",
                    "value": "Upgrade to Net-OAuth 0.33 or later."
                }
            ],
            "source": {
                "discovery": "UNKNOWN"
            },
            "title": "Net::OAuth versions before 0.33 for Perl allow the sender to choose the signature algorithm in verify",
            "x_generator": {
                "engine": "cpansec-cna-tool 0.1"
            }
        },
        "adp": [
            {
                "title": "CVE Program Container",
                "references": [
                    {
                        "url": "http://www.openwall.com/lists/oss-security/2026/08/19/2"
                    }
                ],
                "providerMetadata": {
                    "orgId": "af854a3a-2127-422b-91ae-364da2661108",
                    "shortName": "CVE",
                    "dateUpdated": "2026-08-19T21:07:38.218Z"
                }
            },
            {
                "metrics": [
                    {
                        "cvssV3_1": {
                            "scope": "UNCHANGED",
                            "version": "3.1",
                            "baseScore": 9.8,
                            "attackVector": "NETWORK",
                            "baseSeverity": "CRITICAL",
                            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                            "integrityImpact": "HIGH",
                            "userInteraction": "NONE",
                            "attackComplexity": "LOW",
                            "availabilityImpact": "HIGH",
                            "privilegesRequired": "NONE",
                            "confidentialityImpact": "HIGH"
                        }
                    },
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-08-26T18:02:49.745063Z",
                                "id": "CVE-2026-72889",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
                                    {
                                        "Automatable": "yes"
                                    },
                                    {
                                        "Technical Impact": "total"
                                    }
                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3"
                            }
                        }
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2026-08-26T18:03:05.016Z"
                }
            }
        ]
    }
}