126 lines
5.2 KiB
JSON
126 lines
5.2 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-2026-48523",
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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": "2026-05-21T16:18:10.619Z",
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"datePublished": "2026-05-28T15:10:19.141Z",
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"dateUpdated": "2026-05-28T15:27:49.780Z"
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},
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"containers": {
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"cna": {
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"title": "PyJWT: Algorithm allow-list bypass when decoding with `PyJWK` / `PyJWKClient` keys",
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"problemTypes": [
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{
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"descriptions": [
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{
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"cweId": "CWE-347",
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"lang": "en",
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"description": "CWE-347: Improper Verification of Cryptographic Signature",
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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": "LOW",
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"attackVector": "NETWORK",
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"availabilityImpact": "NONE",
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"baseScore": 5.4,
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"baseSeverity": "MEDIUM",
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"confidentialityImpact": "LOW",
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"integrityImpact": "LOW",
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"privilegesRequired": "LOW",
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"scope": "UNCHANGED",
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"userInteraction": "NONE",
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"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/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/jpadilla/pyjwt/security/advisories/GHSA-jq35-7prp-9v3f",
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"tags": [
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"x_refsource_CONFIRM"
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],
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"url": "https://github.com/jpadilla/pyjwt/security/advisories/GHSA-jq35-7prp-9v3f"
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}
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],
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"affected": [
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{
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"vendor": "jpadilla",
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"product": "pyjwt",
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"versions": [
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{
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"version": ">= 2.9.0, < 2.13.0",
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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": "2026-05-28T15:10:19.141Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "PyJWT is a JSON Web Token implementation in Python. From 2.9.0 to 2.12.1, there is a verifier-side algorithm allow-list bypass when jwt.decode() or jwt.decode_complete() are called with a PyJWK key. The token header alg is checked against the caller-supplied algorithms allow-list, but signature verification is performed with the algorithm bound to the PyJWK object instead of the header algorithm. An attacker who controls a registered JWK/JWKS private key can sign with a disallowed algorithm, advertise an allowed algorithm in the JWT header, and still be accepted. The issue affects the documented PyJWKClient.get_signing_key_from_jwt(...) flow. This vulnerability is fixed in 2.13.0."
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}
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],
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"source": {
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"advisory": "GHSA-jq35-7prp-9v3f",
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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/jpadilla/pyjwt/security/advisories/GHSA-jq35-7prp-9v3f",
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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": "2026-05-28T15:27:44.771049Z",
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"id": "CVE-2026-48523",
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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": "no"
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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": "2026-05-28T15:27:49.780Z"
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}
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}
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]
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}
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} |