Publish Advisories

GHSA-63hf-3vf5-4wqf
GHSA-c427-h43c-vf67

Author: advisory-database[bot]

advisories/github-reviewed/2026/04/GHSA-63hf-3vf5-4wqf/GHSA-63hf-3vf5-4wqf.json

@@ -0,0 +1,72 @@
+{
+  "schema_version": "1.4.0",
+  "id": "GHSA-63hf-3vf5-4wqf",
+  "modified": "2026-04-01T21:49:06Z",
+  "published": "2026-04-01T21:49:06Z",
+  "aliases": [
+    "CVE-2026-34520"
+  ],
+  "summary": "AIOHTTP's C parser (llhttp) accepts null bytes and control characters in response header values - header injection/security bypass",
+  "details": "### Summary\n\nThe C parser (the default for most installs) accepted null bytes and control characters is response headers.\n\n### Impact\n\nAn attacker could send header values that are interpreted differently than expected due to the presence of control characters. For example, `request.url.origin()` may return a different value than the raw Host header, or what a reverse proxy interpreted it as., potentially resulting in some kind of security bypass.\n\n-----\n\nPatch: https://github.com/aio-libs/aiohttp/commit/9370b9714a7a56003cacd31a9b4ae16eab109ba4",
+  "severity": [
+    {
+      "type": "CVSS_V4",
+      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U"
+    }
+  ],
+  "affected": [
+    {
+      "package": {
+        "ecosystem": "PyPI",
+        "name": "aiohttp"
+      },
+      "ranges": [
+        {
+          "type": "ECOSYSTEM",
+          "events": [
+            {
+              "introduced": "0"
+            },
+            {
+              "fixed": "3.13.4"
+            }
+          ]
+        }
+      ],
+      "database_specific": {
+        "last_known_affected_version_range": "<= 3.13.3"
+      }
+    }
+  ],
+  "references": [
+    {
+      "type": "WEB",
+      "url": "https://github.com/aio-libs/aiohttp/security/advisories/GHSA-63hf-3vf5-4wqf"
+    },
+    {
+      "type": "ADVISORY",
+      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-34520"
+    },
+    {
+      "type": "WEB",
+      "url": "https://github.com/aio-libs/aiohttp/commit/9370b9714a7a56003cacd31a9b4ae16eab109ba4"
+    },
+    {
+      "type": "PACKAGE",
+      "url": "https://github.com/aio-libs/aiohttp"
+    },
+    {
+      "type": "WEB",
+      "url": "https://github.com/aio-libs/aiohttp/releases/tag/v3.13.4"
+    }
+  ],
+  "database_specific": {
+    "cwe_ids": [
+      "CWE-113"
+    ],
+    "severity": "LOW",
+    "github_reviewed": true,
+    "github_reviewed_at": "2026-04-01T21:49:06Z",
+    "nvd_published_at": "2026-04-01T21:17:00Z"
+  }
+}

advisories/github-reviewed/2026/04/GHSA-c427-h43c-vf67/GHSA-c427-h43c-vf67.json

@@ -0,0 +1,77 @@
+{
+  "schema_version": "1.4.0",
+  "id": "GHSA-c427-h43c-vf67",
+  "modified": "2026-04-01T21:49:45Z",
+  "published": "2026-04-01T21:49:45Z",
+  "aliases": [
+    "CVE-2026-34525"
+  ],
+  "summary": "AIOHTTP accepts duplicate Host headers",
+  "details": "### Summary\n\nMultiple Host headers were allowed in aiohttp.\n\n### Impact\n\nMostly this doesn't affect aiohttp security itself, but if a reverse proxy is applying security rules depending on the target Host, it is theoretically possible that the proxy and aiohttp could process different host names, possibly resulting in bypassing a security check on the proxy and getting a request processed by aiohttp in a privileged sub app when using `Application.add_domain()`.\n\n-----\n\nPatch: https://github.com/aio-libs/aiohttp/commit/e00ca3cca92c465c7913c4beb763a72da9ed8349\nPatch: https://github.com/aio-libs/aiohttp/commit/53e2e6fc58b89c6185be7820bd2c9f40216b3000",
+  "severity": [
+    {
+      "type": "CVSS_V4",
+      "score": "CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:L/SI:L/SA:N"
+    }
+  ],
+  "affected": [
+    {
+      "package": {
+        "ecosystem": "PyPI",
+        "name": "aiohttp"
+      },
+      "ranges": [
+        {
+          "type": "ECOSYSTEM",
+          "events": [
+            {
+              "introduced": "0"
+            },
+            {
+              "fixed": "3.13.4"
+            }
+          ]
+        }
+      ],
+      "database_specific": {
+        "last_known_affected_version_range": "<= 3.13.3"
+      }
+    }
+  ],
+  "references": [
+    {
+      "type": "WEB",
+      "url": "https://github.com/aio-libs/aiohttp/security/advisories/GHSA-c427-h43c-vf67"
+    },
+    {
+      "type": "ADVISORY",
+      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-34525"
+    },
+    {
+      "type": "WEB",
+      "url": "https://github.com/aio-libs/aiohttp/commit/53e2e6fc58b89c6185be7820bd2c9f40216b3000"
+    },
+    {
+      "type": "WEB",
+      "url": "https://github.com/aio-libs/aiohttp/commit/e00ca3cca92c465c7913c4beb763a72da9ed8349"
+    },
+    {
+      "type": "PACKAGE",
+      "url": "https://github.com/aio-libs/aiohttp"
+    },
+    {
+      "type": "WEB",
+      "url": "https://github.com/aio-libs/aiohttp/releases/tag/v3.13.4"
+    }
+  ],
+  "database_specific": {
+    "cwe_ids": [
+      "CWE-20",
+      "CWE-444"
+    ],
+    "severity": "MODERATE",
+    "github_reviewed": true,
+    "github_reviewed_at": "2026-04-01T21:49:45Z",
+    "nvd_published_at": "2026-04-01T21:17:00Z"
+  }
+}