163 lines
6.7 KiB
JSON
163 lines
6.7 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-2026-49852",
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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": "2026-06-01T22:03:19.640Z",
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"datePublished": "2026-07-17T19:14:58.019Z",
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"dateUpdated": "2026-07-20T14:58:41.701Z"
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},
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"containers": {
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"cna": {
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"title": "joserfc: HS256/HS384/HS512 verify accepts empty/nil HMAC key (cross-language sibling of CVE-2026-45363)",
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"problemTypes": [
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{
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"descriptions": [
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{
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"cweId": "CWE-287",
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"lang": "en",
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"description": "CWE-287: Improper Authentication",
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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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"descriptions": [
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{
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"cweId": "CWE-326",
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"lang": "en",
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"description": "CWE-326: Inadequate Encryption Strength",
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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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"descriptions": [
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{
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"cweId": "CWE-1391",
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"lang": "en",
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"description": "CWE-1391: Use of Weak Credentials",
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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": "NONE",
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"privilegesRequired": "NONE",
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"userInteraction": "NONE",
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"vulnConfidentialityImpact": "NONE",
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"vulnIntegrityImpact": "HIGH",
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"vulnAvailabilityImpact": "NONE",
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"subConfidentialityImpact": "NONE",
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"subIntegrityImpact": "NONE",
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"subAvailabilityImpact": "NONE",
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"baseScore": 8.7,
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"baseSeverity": "HIGH",
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"vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N",
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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/authlib/joserfc/security/advisories/GHSA-gg9x-qcx2-xmrh",
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"tags": [
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"x_refsource_CONFIRM"
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],
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"url": "https://github.com/authlib/joserfc/security/advisories/GHSA-gg9x-qcx2-xmrh"
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},
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{
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"name": "https://github.com/authlib/joserfc/commit/86d00910b2b2d2d07503fee9b572906daefab7f1",
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"tags": [
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"x_refsource_MISC"
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],
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"url": "https://github.com/authlib/joserfc/commit/86d00910b2b2d2d07503fee9b572906daefab7f1"
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},
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{
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"name": "https://github.com/authlib/joserfc/releases/tag/1.6.8",
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"tags": [
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"x_refsource_MISC"
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],
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"url": "https://github.com/authlib/joserfc/releases/tag/1.6.8"
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}
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],
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"affected": [
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{
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"vendor": "authlib",
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"product": "joserfc",
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"versions": [
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{
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"version": "< 1.6.8",
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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": "2026-07-17T19:14:58.019Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "joserfc is a Python library that provides an implementation of several JSON Object Signing and Encryption (JOSE) standards. Prior to 1.6.8, joserfc.jwt.decode accepts attacker-forged HMAC-signed tokens when the caller-supplied verification key is the empty string or None, because HMACAlgorithm.sign and HMACAlgorithm.verify in src/joserfc/_rfc7518/jws_algs.py pass the output of OctKey.get_op_key(...) to hmac.new(...) and OctKey.import_key in src/joserfc/_rfc7518/oct_key.py only emits a SecurityWarning for keys shorter than 14 bytes without rejecting zero-length input. This issue is fixed in version 1.6.8."
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}
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],
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"source": {
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"advisory": "GHSA-gg9x-qcx2-xmrh",
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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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"references": [
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{
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"url": "https://github.com/authlib/joserfc/security/advisories/GHSA-gg9x-qcx2-xmrh",
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"tags": [
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"exploit"
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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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"other": {
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"type": "ssvc",
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"content": {
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"timestamp": "2026-07-20T14:58:30.595996Z",
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"id": "CVE-2026-49852",
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"options": [
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{
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"Exploitation": "poc"
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},
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{
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"Automatable": "yes"
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},
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{
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"Technical Impact": "partial"
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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": "2026-07-20T14:58:41.701Z"
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}
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}
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]
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}
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} |