146 lines
6.5 KiB
JSON
146 lines
6.5 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-2026-49265",
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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": "2026-05-28T14:33:01.180Z",
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"datePublished": "2026-10-13T15:47:11.854Z",
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"dateUpdated": "2026-10-13T16:19:39.092Z"
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},
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"containers": {
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"cna": {
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"title": "OAuthLib: Timing Attack Vulnerability in PKCE code_verifier Comparison",
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"problemTypes": [
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{
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"descriptions": [
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{
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"cweId": "CWE-208",
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"lang": "en",
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"description": "CWE-208: Observable Timing Discrepancy",
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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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"cvssV3_1": {
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"attackComplexity": "HIGH",
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"attackVector": "NETWORK",
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"availabilityImpact": "NONE",
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"baseScore": 6.8,
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"baseSeverity": "MEDIUM",
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"confidentialityImpact": "HIGH",
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"integrityImpact": "HIGH",
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"privilegesRequired": "NONE",
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"scope": "UNCHANGED",
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"userInteraction": "REQUIRED",
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"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N",
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"version": "3.1"
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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/oauthlib/oauthlib/security/advisories/GHSA-xpv3-w29h-x7cv",
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"tags": [
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"x_refsource_CONFIRM"
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],
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"url": "https://github.com/oauthlib/oauthlib/security/advisories/GHSA-xpv3-w29h-x7cv"
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},
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{
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"name": "https://github.com/oauthlib/oauthlib/pull/963",
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"tags": [
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"x_refsource_MISC"
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],
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"url": "https://github.com/oauthlib/oauthlib/pull/963"
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},
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{
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"name": "https://github.com/oauthlib/oauthlib/commit/74664d3fe037a354e180e305135c6bab1747a6b0",
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"tags": [
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"x_refsource_MISC"
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],
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"url": "https://github.com/oauthlib/oauthlib/commit/74664d3fe037a354e180e305135c6bab1747a6b0"
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},
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{
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"name": "https://github.com/oauthlib/oauthlib/releases/tag/v4.0.0",
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"tags": [
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"x_refsource_MISC"
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],
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"url": "https://github.com/oauthlib/oauthlib/releases/tag/v4.0.0"
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},
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{
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"name": "https://github.com/pypa/advisory-database/tree/main/vulns/oauthlib/PYSEC-2026-4114.yaml",
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"tags": [
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"x_refsource_MISC"
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],
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"url": "https://github.com/pypa/advisory-database/tree/main/vulns/oauthlib/PYSEC-2026-4114.yaml"
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}
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],
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"affected": [
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{
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"vendor": "oauthlib",
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"product": "oauthlib",
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"versions": [
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{
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"version": ">= 3.0.0, < 4.0.0",
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"status": "affected"
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}
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]
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}
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],
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"providerMetadata": {
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"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
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"shortName": "GitHub_M",
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"dateUpdated": "2026-10-13T15:47:11.854Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "OAuthLib is an implementation of the OAuth request-signing logic for Python 3.6+. From 3.0.0 until 4.0.0, OAuthLib's PKCE checks in oauthlib/oauth2/rfc6749/grant_types/authorization_code.py compare attacker-supplied code_verifier values with stored challenges using ordinary string equality in code_challenge_method_plain and code_challenge_method_s256. Because the comparison can return after a length difference or the first mismatching character, repeated token endpoint measurements can reveal common-prefix timing information that could potentially allow recovery of the code_verifier, unauthorized access-token acquisition, and account takeover. Practical exploitation requires an intercepted, single-use authorization code and enough measurements to overcome real-world network noise; the local timing benchmark does not establish practical remote account takeover, so the weakness remains a defense-in-depth concern. This issue is fixed in version 4.0.0."
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}
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],
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"source": {
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"advisory": "GHSA-xpv3-w29h-x7cv",
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"discovery": "UNKNOWN"
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}
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},
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"adp": [
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{
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"metrics": [
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{
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"other": {
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"type": "ssvc",
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"content": {
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"timestamp": "2026-10-13T16:19:32.600149Z",
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"id": "CVE-2026-49265",
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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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],
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"role": "CISA Coordinator",
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"version": "2.0.3"
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}
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}
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}
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],
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"title": "CISA ADP Vulnrichment",
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"providerMetadata": {
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"shortName": "CISA-ADP",
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"dateUpdated": "2026-10-13T16:19:39.092Z"
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}
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}
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]
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}
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} |