139 lines
6.4 KiB
JSON
139 lines
6.4 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-2026-46482",
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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": "2026-05-14T18:06:06.810Z",
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"datePublished": "2026-08-18T15:44:59.644Z",
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"dateUpdated": "2026-08-18T17:46:31.511Z"
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},
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"containers": {
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"cna": {
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"title": "MyBB: Security Question insufficient validation",
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"problemTypes": [
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{
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"descriptions": [
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{
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"cweId": "CWE-636",
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"lang": "en",
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"description": "CWE-636: Not Failing Securely ('Failing Open')",
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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": 5.3,
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"baseSeverity": "MEDIUM",
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"confidentialityImpact": "NONE",
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"integrityImpact": "LOW",
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"privilegesRequired": "NONE",
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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:N/UI:N/S:U/C:N/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/mybb/mybb/security/advisories/GHSA-v2h7-4jp7-j6hh",
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"tags": [
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"x_refsource_CONFIRM"
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],
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"url": "https://github.com/mybb/mybb/security/advisories/GHSA-v2h7-4jp7-j6hh"
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},
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{
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"name": "https://github.com/mybb/mybb/commit/bd2a3447939d3084a5926dd66ece04649e0e0d60",
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"tags": [
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"x_refsource_MISC"
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],
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"url": "https://github.com/mybb/mybb/commit/bd2a3447939d3084a5926dd66ece04649e0e0d60"
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},
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{
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"name": "https://github.com/mybb/mybb/releases/tag/mybb_1840",
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"tags": [
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"x_refsource_MISC"
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],
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"url": "https://github.com/mybb/mybb/releases/tag/mybb_1840"
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},
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{
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"name": "https://mybb.com/versions/1.8.40",
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"tags": [
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"x_refsource_MISC"
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],
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"url": "https://mybb.com/versions/1.8.40"
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}
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],
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"affected": [
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{
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"vendor": "mybb",
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"product": "mybb",
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"versions": [
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{
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"version": "< 1.8.40",
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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": "2026-08-18T15:44:59.644Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "### Impact\nThe registration component does not validate the text-based _Security Question_ CAPTCHA correctly, allowing attackers to bypass the challenge via a specially crafted value.\n\n\n[CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N](https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N)\n\n### Details\nThe public _Registration_ workflow ([`member.php?action=do_register`](https://github.com/mybb/mybb/blob/mybb_1839/member.php#L262-L307)) accepts a hidden field `question_id` — expected to match the question session identifier (`mybb_questionsessions.sid`) — and validates the challenge answer without a fail-closed fallback for invalid identifiers. If the value is blank, forged, or expired, the request continues without a question-related error.\n\n### Patches\nMyBB 1.8.(...) resolves this issue with the following changes:\n\n- Commit: https://github.com/mybb/mybb/commit/\n - `.patch`: https://github.com/mybb/mybb/commit/.patch\n\n### References\n- Release Notes: https://mybb.com/versions/1.8.(...)/\n\n### For more information\nGo to [mybb.com/security](https://mybb.com/security/) to report possible security concerns or to learn more about security research at MyBB.\n\n### Contact\nThe security team can be reached at [security@mybb.com](mailto:security@mybb.com)."
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}
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],
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"source": {
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"advisory": "GHSA-v2h7-4jp7-j6hh",
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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": "2026-08-18T17:44:40.432629Z",
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"id": "CVE-2026-46482",
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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": "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": "2026-08-18T17:46:31.511Z"
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}
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}
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]
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}
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} |