375 lines
18 KiB
JSON
375 lines
18 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2026-40110",
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"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
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"state": "PUBLISHED",
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"assignerShortName": "GitHub_M",
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"dateReserved": "2026-04-09T01:41:38.536Z",
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"datePublished": "2026-05-05T21:29:31.323Z",
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"dateUpdated": "2026-07-22T12:08:40.428Z"
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},
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"containers": {
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"cna": {
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"title": "jupyter-server CORS origin validation bypass via unanchored regex in allow_origin_pat",
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"problemTypes": [
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{
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"descriptions": [
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{
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"cweId": "CWE-777",
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"lang": "en",
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"description": "CWE-777: Regular Expression without Anchors",
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"type": "CWE"
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}
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]
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}
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],
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"metrics": [
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{
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"cvssV4_0": {
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"attackVector": "NETWORK",
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"attackComplexity": "LOW",
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"attackRequirements": "PRESENT",
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"privilegesRequired": "NONE",
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"userInteraction": "PASSIVE",
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"vulnConfidentialityImpact": "HIGH",
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"vulnIntegrityImpact": "HIGH",
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"vulnAvailabilityImpact": "LOW",
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"subConfidentialityImpact": "LOW",
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"subIntegrityImpact": "LOW",
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"subAvailabilityImpact": "LOW",
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"baseScore": 7.6,
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"baseSeverity": "HIGH",
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"vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:L/SC:L/SI:L/SA:L",
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"version": "4.0"
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}
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}
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],
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"references": [
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{
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"name": "https://github.com/jupyter-server/jupyter_server/security/advisories/GHSA-24qx-w28j-9m6p",
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"tags": [
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"x_refsource_CONFIRM"
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],
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"url": "https://github.com/jupyter-server/jupyter_server/security/advisories/GHSA-24qx-w28j-9m6p"
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},
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{
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"name": "https://github.com/jupyter-server/jupyter_server/pull/603",
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"tags": [
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"x_refsource_MISC"
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],
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"url": "https://github.com/jupyter-server/jupyter_server/pull/603"
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},
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{
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"name": "https://github.com/jupyter-server/jupyter_server/commit/057869a327c46730afede3eab0ca2d2e3e74acea",
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"tags": [
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"x_refsource_MISC"
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],
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"url": "https://github.com/jupyter-server/jupyter_server/commit/057869a327c46730afede3eab0ca2d2e3e74acea"
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},
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{
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"name": "https://github.com/jupyter-server/jupyter_server/commit/49b34392feaa97735b3b777e3baf8f22f2a14ed8",
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"tags": [
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"x_refsource_MISC"
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],
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"url": "https://github.com/jupyter-server/jupyter_server/commit/49b34392feaa97735b3b777e3baf8f22f2a14ed8"
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}
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],
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"affected": [
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{
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"vendor": "jupyter-server",
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"product": "jupyter_server",
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"versions": [
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{
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"version": "<= 2.17.0",
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"status": "affected"
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}
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "Jupyter Server is the backend for Jupyter web applications. In versions 2.17.0 and earlier, the Origin header validation uses Python's re.match() to check incoming origins against the allow_origin_pat configuration value. Because re.match() only anchors at the start of the string and does not require a full match, a pattern intended to match only a trusted domain (e.g., trusted.example.com) will also match any origin that begins with that domain followed by additional characters (e.g., trusted.example.com.evil.com). An attacker who controls such a domain can bypass the CORS origin restriction and make cross-origin requests to the Jupyter Server API from an untrusted site. This issue has been fixed in version 2.18.0."
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}
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],
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"source": {
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"advisory": "GHSA-24qx-w28j-9m6p",
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"discovery": "UNKNOWN"
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}
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},
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{
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"metrics": [
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"content": {
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"timestamp": "2026-05-07T03:55:47.112003Z",
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"id": "CVE-2026-40110",
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"options": [
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{
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"Exploitation": "none"
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},
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{
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"Automatable": "no"
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},
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{
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"Technical Impact": "total"
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}
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"version": "2.0.3"
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}
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"title": "CISA ADP Vulnrichment",
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"shortName": "CISA-ADP",
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"dateUpdated": "2026-05-07T12:47:52.707Z"
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{
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"affected": [
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{
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"collectionURL": "https://catalog.redhat.com/software/containers/",
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"versions": [
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{
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"lessThan": "*",
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"status": "unaffected",
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"version": "1784109883",
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"versionType": "rpm"
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"value": "A flaw was found in Jupyter Server. The Origin header validation, which uses Python's `re.match()` function, does not correctly validate incoming origins against allowed patterns. This allows a remote attacker to bypass Cross-Origin Resource Sharing (CORS) restrictions by crafting a malicious domain that partially matches a trusted one. Consequently, the attacker can make unauthorized cross-origin requests to the Jupyter Server API from an untrusted site, potentially leading to sensitive information disclosure or other unauthorized actions."
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"value": "Reported to Red Hat."
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"time": "2026-05-05T21:29:31.323Z",
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"value": "Made public."
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"title": "jupyter-server: Jupyter Server: Cross-Origin Resource Sharing (CORS) bypass via improper Origin header validation",
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"lang": "en",
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"value": "Administrators should review and update the `allow_origin_pat` configuration in Jupyter Server to use a more precise regular expression. Ensure the pattern explicitly anchors to the end of the string (e.g., by adding `$` to the end of the regex) to prevent partial domain matches. After modifying the configuration, the Jupyter Server service must be restarted for the changes to take effect."
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