Common Weakness Enumeration

CWE-93

Allowed

Improper Neutralization of CRLF Sequences ('CRLF Injection')

Abstraction: Base · Status: Draft

API response cwe.mitre.org

The product uses CRLF (carriage return line feeds) as a special element, e.g. to separate lines or records, but it does not neutralize or incorrectly neutralizes CRLF sequences from inputs.

387 vulnerabilities reference this CWE, most recent first.

GHSA-HPGH-HPWG-532V

Vulnerability from github – Published: 2026-06-04 00:30 – Updated: 2026-06-04 21:31
VLAI
Details

Net::Async::Statsd::Client versions through 0.005 for Perl allow metric injections.

The metric names are not checked for newlines, colons or pipes. Metrics generated from untrusted sources could inject additional statsd metrics.

Severity
6.5 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
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{
  "affected": [],
  "aliases": [
    "CVE-2026-8722"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-93"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-06-04T00:17:00Z",
    "severity": "MODERATE"
  },
  "details": "Net::Async::Statsd::Client versions through 0.005 for Perl allow metric injections.\n\nThe metric names are not checked for newlines, colons or pipes. Metrics generated from untrusted sources could inject additional statsd metrics.",
  "id": "GHSA-hpgh-hpwg-532v",
  "modified": "2026-06-04T21:31:20Z",
  "published": "2026-06-04T00:30:25Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-8722"
    },
    {
      "type": "WEB",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-46719"
    },
    {
      "type": "WEB",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-46720"
    }
  ],
  "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:N",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-HQ7V-MX3G-29HW

Vulnerability from github – Published: 2026-06-11 13:04 – Updated: 2026-07-15 21:58
VLAI
Summary
guzzlehttp/psr7 has CRLF Injection via URI Host Component
Details

Impact

guzzlehttp/psr7 did not reject ASCII control characters, whitespace, or DEL in first-party URI host components. The issue requires a PSR-7 request to be serialized into a raw HTTP/1.x message, for example with GuzzleHttp\Psr7\Message::toString() or an equivalent custom serializer. Creating a Uri, Request, or other PSR-7 object alone is not sufficient. The malformed host must be copied into the serialized Host header without further validation.

A vulnerable flow is:

  1. An application accepts a user-controlled URL.
  2. The URL is used to construct a PSR-7 Uri or Request.
  3. The host component contains CRLF or another header-unsafe character.
  4. The request is serialized into a raw HTTP/1.x message without an explicit Host header.
  5. The host is copied into the serialized Host header.
  6. The serialized request is written to the network or otherwise processed by software that does not independently reject the malformed host.

In that flow, an attacker can cause the serialized request to contain additional attacker-controlled header lines. For example, a host containing "\r\nX-Injected: yes" can cause the generated Host header to span multiple HTTP header lines.

This is not the normal request-sending path used by guzzlehttp/guzzle. Applications using guzzlehttp/psr7 only through Guzzle's standard HTTP client APIs are not expected to be affected. Applications are most likely to be affected when they manually serialize PSR-7 requests, forward raw HTTP messages, or use custom transports, proxying, crawling, webhook delivery, or similar request-dispatch code that serializes requests without independently validating URI hosts and header data. In deployments involving HTTP/1.1 connection reuse, proxies, gateways, or load balancers, this malformed serialized request may also contribute to request smuggling or cache poisoning, depending on how downstream components parse the request.

Patches

The issue is patched in 2.10.2 and later. 1.x is end-of-life and will not receive a patch.

Workarounds

If you cannot upgrade immediately, validate and reject all untrusted URI strings before constructing PSR-7 Uri or Request instances. Reject input containing ASCII control characters, whitespace, or DEL, including CRLF, tab, space, NUL, or DEL characters:

if (preg_match('/[\x00-\x20\x7F]/', $untrustedUrl)) {
    throw new \InvalidArgumentException('Insecure URL detected');
}

Applications that manually serialize or forward requests should also ensure the final HTTP client, transport, or serializer rejects invalid URI and header data before writing requests to the network.

References

  • https://www.rfc-editor.org/rfc/rfc9112.html#section-3.2
  • https://www.rfc-editor.org/rfc/rfc9112.html#section-5
  • https://www.rfc-editor.org/rfc/rfc9112.html#section-11.2
  • https://www.rfc-editor.org/rfc/rfc9110.html#section-7.2
Severity
5.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Show details on source website
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{
  "affected": [
    {
      "package": {
        "ecosystem": "Packagist",
        "name": "guzzlehttp/psr7"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.10.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-49214"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-113",
      "CWE-20",
      "CWE-93"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-06-11T13:04:47Z",
    "nvd_published_at": "2026-06-11T13:16:33Z",
    "severity": "MODERATE"
  },
  "details": "## Impact\n\n`guzzlehttp/psr7` did not reject ASCII control characters, whitespace, or DEL in first-party URI host components. The issue requires a PSR-7 request to be serialized into a raw HTTP/1.x message, for example with `GuzzleHttp\\Psr7\\Message::toString()` or an equivalent custom serializer. Creating a `Uri`, `Request`, or other PSR-7 object alone is not sufficient. The malformed host must be copied into the serialized `Host` header without further validation.\n\nA vulnerable flow is:\n\n1. An application accepts a user-controlled URL.\n2. The URL is used to construct a PSR-7 `Uri` or `Request`.\n3. The host component contains CRLF or another header-unsafe character.\n4. The request is serialized into a raw HTTP/1.x message without an explicit `Host` header.\n5. The host is copied into the serialized `Host` header.\n6. The serialized request is written to the network or otherwise processed by software that does not independently reject the malformed host.\n\nIn that flow, an attacker can cause the serialized request to contain additional attacker-controlled header lines. For example, a host containing `\"\\r\\nX-Injected: yes\"` can cause the generated `Host` header to span multiple HTTP header lines.\n\nThis is not the normal request-sending path used by `guzzlehttp/guzzle`. Applications using `guzzlehttp/psr7` only through Guzzle\u0027s standard HTTP client APIs are not expected to be affected. Applications are most likely to be affected when they manually serialize PSR-7 requests, forward raw HTTP messages, or use custom transports, proxying, crawling, webhook delivery, or similar request-dispatch code that serializes requests without independently validating URI hosts and header data. In deployments involving HTTP/1.1 connection reuse, proxies, gateways, or load balancers, this malformed serialized request may also contribute to request smuggling or cache poisoning, depending on how downstream components parse the request.\n\n## Patches\n\nThe issue is patched in `2.10.2` and later. `1.x` is end-of-life and will not receive a patch.\n\n## Workarounds\n\nIf you cannot upgrade immediately, validate and reject all untrusted URI strings before constructing PSR-7 `Uri` or `Request` instances. Reject input containing ASCII control characters, whitespace, or DEL, including CRLF, tab, space, NUL, or DEL characters:\n\n```php\nif (preg_match(\u0027/[\\x00-\\x20\\x7F]/\u0027, $untrustedUrl)) {\n    throw new \\InvalidArgumentException(\u0027Insecure URL detected\u0027);\n}\n```\n\nApplications that manually serialize or forward requests should also ensure the final HTTP client, transport, or serializer rejects invalid URI and header data before writing requests to the network.\n\n## References\n\n* https://www.rfc-editor.org/rfc/rfc9112.html#section-3.2\n* https://www.rfc-editor.org/rfc/rfc9112.html#section-5\n* https://www.rfc-editor.org/rfc/rfc9112.html#section-11.2\n* https://www.rfc-editor.org/rfc/rfc9110.html#section-7.2",
  "id": "GHSA-hq7v-mx3g-29hw",
  "modified": "2026-07-15T21:58:03Z",
  "published": "2026-06-11T13:04:47Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/guzzle/psr7/security/advisories/GHSA-hq7v-mx3g-29hw"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-49214"
    },
    {
      "type": "WEB",
      "url": "https://github.com/FriendsOfPHP/security-advisories/blob/master/guzzlehttp/psr7/CVE-2026-49214.yaml"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/guzzle/psr7"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "guzzlehttp/psr7 has CRLF Injection via URI Host Component"
}

GHSA-HR5V-C6V7-WV78

Vulnerability from github – Published: 2022-05-14 03:46 – Updated: 2022-05-14 03:46
VLAI
Details

CRLF injection vulnerability in OXID eShop Professional Edition before 4.7.11 and 4.8.x before 4.8.4, Enterprise Edition before 5.0.11 and 5.1.x before 5.1.4, and Community Edition before 4.7.11 and 4.8.x before 4.8.4 allows remote attackers to inject arbitrary HTTP headers and conduct HTTP response splitting attacks via unspecified vectors.

Severity
6.1 (Medium)
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Show details on source website
To clipboard 

{
  "affected": [],
  "aliases": [
    "CVE-2014-2017"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-93"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2018-01-18T14:29:00Z",
    "severity": "MODERATE"
  },
  "details": "CRLF injection vulnerability in OXID eShop Professional Edition before 4.7.11 and 4.8.x before 4.8.4, Enterprise Edition before 5.0.11 and 5.1.x before 5.1.4, and Community Edition before 4.7.11 and 4.8.x before 4.8.4 allows remote attackers to inject arbitrary HTTP headers and conduct HTTP response splitting attacks via unspecified vectors.",
  "id": "GHSA-hr5v-c6v7-wv78",
  "modified": "2022-05-14T03:46:10Z",
  "published": "2022-05-14T03:46:10Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2014-2017"
    },
    {
      "type": "WEB",
      "url": "https://bugs.oxid-esales.com/view.php?id=5635"
    },
    {
      "type": "WEB",
      "url": "https://oxidforge.org/en/security-bulletin-2014-002.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-HV23-4QP7-8C8R

Vulnerability from github – Published: 2026-05-11 21:31 – Updated: 2026-06-08 20:16
VLAI
Summary
ninenines cowlib: Improper Neutralization of CRLF Sequences ('CRLF Injection') vulnerability allows SSE event splitting and injection via unvalidated field values
Details

Improper Neutralization of CRLF Sequences ('CRLF Injection') vulnerability in ninenines cowlib allows SSE event splitting and injection via unvalidated field values.

cow_sse:event/1 in cowlib guards the id and event fields against \n but not against bare \r, and the internal prefix_lines/2 function used for data and comment fields splits only on \n. Because the SSE specification requires decoders to treat \r\n, \r, and \n as equivalent line terminators, an attacker who controls any of these fields can inject additional SSE lines and forge a complete event with an arbitrary event type and data payload on the receiving end. In typical deployments where browser EventSource clients or other SSE consumers dispatch on event.type and render event.data, this enables event splitting, client-side logic manipulation, and stored-XSS-equivalent behaviour when event data is inserted into the DOM.

This issue affects cowlib from 2.6.0.

Severity
4.0 (Medium)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N
6.3 (Medium)
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:L/SA:N
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{
  "affected": [
    {
      "package": {
        "ecosystem": "Hex",
        "name": "cowlib"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.6.0"
            },
            {
              "fixed": "2.16.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-43968"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-93"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-05-18T16:47:11Z",
    "nvd_published_at": "2026-05-11T19:16:25Z",
    "severity": "MODERATE"
  },
  "details": "Improper Neutralization of CRLF Sequences (\u0027CRLF Injection\u0027) vulnerability in ninenines cowlib allows SSE event splitting and injection via unvalidated field values.\n\ncow_sse:event/1 in cowlib guards the id and event fields against \\n but not against bare \\r, and the internal prefix_lines/2 function used for data and comment fields splits only on \\n. Because the SSE specification requires decoders to treat \\r\\n, \\r, and \\n as equivalent line terminators, an attacker who controls any of these fields can inject additional SSE lines and forge a complete event with an arbitrary event type and data payload on the receiving end. In typical deployments where browser EventSource clients or other SSE consumers dispatch on event.type and render event.data, this enables event splitting, client-side logic manipulation, and stored-XSS-equivalent behaviour when event data is inserted into the DOM.\n\nThis issue affects cowlib from 2.6.0.",
  "id": "GHSA-hv23-4qp7-8c8r",
  "modified": "2026-06-08T20:16:50Z",
  "published": "2026-05-11T21:31:34Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43968"
    },
    {
      "type": "WEB",
      "url": "https://github.com/ninenines/cowlib/commit/6165fc40efa159ba1cceee7e7981e790acba5d9c"
    },
    {
      "type": "WEB",
      "url": "https://cna.erlef.org/cves/CVE-2026-43968.html"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/ninenines/cowlib"
    },
    {
      "type": "WEB",
      "url": "https://github.com/ninenines/cowlib/releases/tag/2.16.1"
    },
    {
      "type": "WEB",
      "url": "https://osv.dev/vulnerability/EEF-CVE-2026-43968"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:L/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "ninenines cowlib: Improper Neutralization of CRLF Sequences (\u0027CRLF Injection\u0027) vulnerability allows SSE event splitting and injection via unvalidated field values"
}

GHSA-J296-JHQ5-3X6C

Vulnerability from github – Published: 2024-03-06 18:30 – Updated: 2024-03-06 18:30
VLAI
Details

A vulnerability in the SAML authentication process of Cisco Secure Client could allow an unauthenticated, remote attacker to conduct a carriage return line feed (CRLF) injection attack against a user.

This vulnerability is due to insufficient validation of user-supplied input. An attacker could exploit this vulnerability by persuading a user to click a crafted link while establishing a VPN session. A successful exploit could allow the attacker to execute arbitrary script code in the browser or access sensitive, browser-based information, including a valid SAML token. The attacker could then use the token to establish a remote access VPN session with the privileges of the affected user. Individual hosts and services behind the VPN headend would still need additional credentials for successful access.

Severity
8.2 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N
Show details on source website
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{
  "affected": [],
  "aliases": [
    "CVE-2024-20337"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-93"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-03-06T17:15:09Z",
    "severity": "HIGH"
  },
  "details": "A vulnerability in the SAML authentication process of Cisco Secure Client could allow an unauthenticated, remote attacker to conduct a carriage return line feed (CRLF) injection attack against a user. \n\n This vulnerability is due to insufficient validation of user-supplied input. An attacker could exploit this vulnerability by persuading a user to click a crafted link while establishing a VPN session. A successful exploit could allow the attacker to execute arbitrary script code in the browser or access sensitive, browser-based information, including a valid SAML token. The attacker could then use the token to establish a remote access VPN session with the privileges of the affected user. Individual hosts and services behind the VPN headend would still need additional credentials for successful access.",
  "id": "GHSA-j296-jhq5-3x6c",
  "modified": "2024-03-06T18:30:37Z",
  "published": "2024-03-06T18:30:37Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-20337"
    },
    {
      "type": "WEB",
      "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-secure-client-crlf-W43V4G7"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-J354-JR4F-Q3J5

Vulnerability from github – Published: 2022-05-24 16:48 – Updated: 2024-04-04 01:04
VLAI
Details

Incorrect implementation in Content Security Policy in Google Chrome prior to 67.0.3396.79 allowed a remote attacker to bypass navigation restrictions via a crafted HTML page.

Severity
6.5 (Medium)
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
Show details on source website
To clipboard 

{
  "affected": [],
  "aliases": [
    "CVE-2018-6148"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-93"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2019-06-27T17:15:00Z",
    "severity": "MODERATE"
  },
  "details": "Incorrect implementation in Content Security Policy in Google Chrome prior to 67.0.3396.79 allowed a remote attacker to bypass navigation restrictions via a crafted HTML page.",
  "id": "GHSA-j354-jr4f-q3j5",
  "modified": "2024-04-04T01:04:52Z",
  "published": "2022-05-24T16:48:48Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2018-6148"
    },
    {
      "type": "WEB",
      "url": "https://chromereleases.googleblog.com/2018/06/stable-channel-update-for-desktop.html"
    },
    {
      "type": "WEB",
      "url": "https://crbug.com/845961"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-J4M7-FWX2-6W4C

Vulnerability from github – Published: 2022-05-17 02:45 – Updated: 2022-05-17 02:45
VLAI
Details

An issue was discovered on Accellion FTA devices before FTA_9_12_180. There is a CRLF vulnerability in settings_global_text_edit.php allowing ?display=x%0Dnewline attacks.

Severity
6.1 (Medium)
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Show details on source website
To clipboard 

{
  "affected": [],
  "aliases": [
    "CVE-2017-8788"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-93"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2017-05-05T18:29:00Z",
    "severity": "MODERATE"
  },
  "details": "An issue was discovered on Accellion FTA devices before FTA_9_12_180. There is a CRLF vulnerability in settings_global_text_edit.php allowing ?display=x%0Dnewline attacks.",
  "id": "GHSA-j4m7-fwx2-6w4c",
  "modified": "2022-05-17T02:45:14Z",
  "published": "2022-05-17T02:45:14Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2017-8788"
    },
    {
      "type": "WEB",
      "url": "https://gist.github.com/anonymous/32e2894fa29176f3f32cb2b2bb7c24cb"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-J592-X6JP-9FG8

Vulnerability from github – Published: 2026-03-11 18:30 – Updated: 2026-03-11 18:30
VLAI
Details

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 8.11 before 18.7.6, 18.8 before 18.8.6, and 18.9 before 18.9.2 that could have allowed an authenticated user to make unintended internal requests through proxy environments under certain conditions due to improper input validation in import functionality.

Severity
5.0 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N
Show details on source website
To clipboard 

{
  "affected": [],
  "aliases": [
    "CVE-2026-3848"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-93"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-03-11T16:16:47Z",
    "severity": "MODERATE"
  },
  "details": "GitLab has remediated an issue in GitLab CE/EE affecting all versions from 8.11 before 18.7.6, 18.8 before 18.8.6, and 18.9 before 18.9.2 that could have allowed an authenticated user to make unintended internal requests through proxy environments under certain conditions due to improper input validation in import functionality.",
  "id": "GHSA-j592-x6jp-9fg8",
  "modified": "2026-03-11T18:30:32Z",
  "published": "2026-03-11T18:30:32Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-3848"
    },
    {
      "type": "WEB",
      "url": "https://about.gitlab.com/releases/2026/03/11/patch-release-gitlab-18-9-2-released"
    },
    {
      "type": "WEB",
      "url": "https://gitlab.com/gitlab-org/gitlab/-/work_items/577298"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-J6F7-HGHW-G437

Vulnerability from github – Published: 2022-05-17 03:05 – Updated: 2024-11-18 16:26
VLAI
Summary
bottle.py vulnerable to CRLF Injection
Details

bottle.py is a fast and simple micro-framework for python web-applications. redirect() in bottle.py in bottle 0.12.10 doesn't filter a "\r\n" sequence, which leads to a CRLF attack, as demonstrated by a redirect("233\r\nSet-Cookie: name=salt") call.

Severity
6.5 (Medium)
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
7.1 (High)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
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{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "bottle"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.10.1"
            },
            {
              "fixed": "0.12.11"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2016-9964"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-93"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2022-05-31T15:43:48Z",
    "nvd_published_at": "2016-12-16T09:59:00Z",
    "severity": "HIGH"
  },
  "details": "bottle.py is a fast and simple micro-framework for python web-applications. redirect() in bottle.py in bottle 0.12.10 doesn\u0027t filter a \"\\r\\n\" sequence, which leads to a CRLF attack, as demonstrated by a redirect(\"233\\r\\nSet-Cookie: name=salt\") call.",
  "id": "GHSA-j6f7-hghw-g437",
  "modified": "2024-11-18T16:26:23Z",
  "published": "2022-05-17T03:05:15Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2016-9964"
    },
    {
      "type": "WEB",
      "url": "https://github.com/bottlepy/bottle/issues/913"
    },
    {
      "type": "WEB",
      "url": "https://github.com/bottlepy/bottle/commit/6d7e13da0f998820800ecb3fe9ccee4189aefb54"
    },
    {
      "type": "WEB",
      "url": "https://github.com/bottlepy/bottle/commit/78f67d51965db11cb1ed0003f1eb7926458b5c2c"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/advisories/GHSA-j6f7-hghw-g437"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/bottlepy/bottle"
    },
    {
      "type": "WEB",
      "url": "https://github.com/pypa/advisory-database/tree/main/vulns/bottle/PYSEC-2016-24.yaml"
    },
    {
      "type": "WEB",
      "url": "https://web.archive.org/web/20170214030628/http://www.securityfocus.com/bid/94961"
    },
    {
      "type": "WEB",
      "url": "http://www.debian.org/security/2016/dsa-3743"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "bottle.py vulnerable to CRLF Injection"
}

GHSA-J9F9-W8PJ-32F8

Vulnerability from github – Published: 2026-08-27 06:31 – Updated: 2026-08-27 18:32
VLAI
Details

Spring MVC and WebFlux applications are vulnerable to stream corruption when using Server-Sent Events (SSE) with view fragments. Spring Framework 7.0.0 - 7.0.8 Spring Framework 6.2.0 - 6.2.19

Severity
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Show details on source website
To clipboard 

{
  "affected": [],
  "aliases": [
    "CVE-2026-47890"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-93"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-27T06:17:20Z",
    "severity": "CRITICAL"
  },
  "details": "Spring MVC and WebFlux applications are vulnerable to stream corruption when using Server-Sent Events (SSE) with view fragments.\nSpring Framework 7.0.0 - 7.0.8\nSpring Framework 6.2.0 - 6.2.19",
  "id": "GHSA-j9f9-w8pj-32f8",
  "modified": "2026-08-27T18:32:10Z",
  "published": "2026-08-27T06:31:34Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-47890"
    },
    {
      "type": "WEB",
      "url": "https://spring.io/security/cve-2026-47890"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}
Mitigation
Implementation

Avoid using CRLF as a special sequence.

Mitigation
Implementation

Appropriately filter or quote CRLF sequences in user-controlled input.

CAPEC-15: Command Delimiters

An attack of this type exploits a programs' vulnerabilities that allows an attacker's commands to be concatenated onto a legitimate command with the intent of targeting other resources such as the file system or database. The system that uses a filter or denylist input validation, as opposed to allowlist validation is vulnerable to an attacker who predicts delimiters (or combinations of delimiters) not present in the filter or denylist. As with other injection attacks, the attacker uses the command delimiter payload as an entry point to tunnel through the application and activate additional attacks through SQL queries, shell commands, network scanning, and so on.

CAPEC-81: Web Server Logs Tampering

Web Logs Tampering attacks involve an attacker injecting, deleting or otherwise tampering with the contents of web logs typically for the purposes of masking other malicious behavior. Additionally, writing malicious data to log files may target jobs, filters, reports, and other agents that process the logs in an asynchronous attack pattern. This pattern of attack is similar to "Log Injection-Tampering-Forging" except that in this case, the attack is targeting the logs of the web server and not the application.

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