175 lines
7.5 KiB
JSON
175 lines
7.5 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-2026-54741",
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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": "2026-06-15T23:12:41.964Z",
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"datePublished": "2026-08-19T20:13:05.201Z",
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"dateUpdated": "2026-08-20T13:21:16.938Z"
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},
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"containers": {
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"cna": {
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"title": "Lemmy: Blocked users can edit private messages sent before the block",
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"problemTypes": [
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{
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"descriptions": [
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{
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"cweId": "CWE-862",
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"lang": "en",
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"description": "CWE-862: Missing Authorization",
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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": "LOW",
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"userInteraction": "NONE",
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"vulnConfidentialityImpact": "NONE",
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"vulnIntegrityImpact": "LOW",
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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": 5.3,
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"baseSeverity": "MEDIUM",
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"vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/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/LemmyNet/lemmy/security/advisories/GHSA-46g9-847m-qf8r",
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"tags": [
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"x_refsource_CONFIRM"
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],
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"url": "https://github.com/LemmyNet/lemmy/security/advisories/GHSA-46g9-847m-qf8r"
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},
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{
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"name": "https://github.com/LemmyNet/lemmy/pull/6472",
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"tags": [
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"x_refsource_MISC"
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],
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"url": "https://github.com/LemmyNet/lemmy/pull/6472"
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},
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{
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"name": "https://github.com/LemmyNet/lemmy/pull/6476",
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"tags": [
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"x_refsource_MISC"
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],
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"url": "https://github.com/LemmyNet/lemmy/pull/6476"
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},
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{
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"name": "https://github.com/LemmyNet/lemmy/commit/051b317c9d14b91972bb372c67f319d6900beb93",
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"tags": [
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"x_refsource_MISC"
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],
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"url": "https://github.com/LemmyNet/lemmy/commit/051b317c9d14b91972bb372c67f319d6900beb93"
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},
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{
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"name": "https://github.com/LemmyNet/lemmy/commit/2d169d630b86b9351e4b1dca451214b741f46150",
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"tags": [
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"x_refsource_MISC"
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],
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"url": "https://github.com/LemmyNet/lemmy/commit/2d169d630b86b9351e4b1dca451214b741f46150"
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},
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{
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"name": "https://github.com/LemmyNet/lemmy/releases/tag/0.19.19",
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"tags": [
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"x_refsource_MISC"
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],
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"url": "https://github.com/LemmyNet/lemmy/releases/tag/0.19.19"
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},
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{
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"name": "https://github.com/LemmyNet/lemmy/releases/tag/1.0.0-alpha.18",
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"tags": [
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"x_refsource_MISC"
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],
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"url": "https://github.com/LemmyNet/lemmy/releases/tag/1.0.0-alpha.18"
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}
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],
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"affected": [
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{
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"vendor": "LemmyNet",
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"product": "lemmy",
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"versions": [
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{
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"version": "< 0.19.19",
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"status": "affected"
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},
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{
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"version": ">= 1.0.0-alpha.0, < 1.0.0-alpha.18",
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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": "2026-08-19T20:13:05.201Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "Lemmy is a link aggregator and forum for the fediverse. Prior to 0.19.19 and 1.0.0-alpha.18, Lemmy blocks new private messages from a sender after the recipient blocks that sender, but the edit path skips the same block check. create_private_message checks the recipient's block list with PersonActions::read_block before inserting a message, while edit_private_message in crates/api/api_crud/src/private_message/update.rs only checks that the caller is orig_private_message.creator_id. The update then writes new content and returns the modified PrivateMessageView without consulting the recipient's block list, allowing a blocked sender to keep changing an old message that the recipient can still see and providing a post-block harassment path. This issue is fixed in versions 0.19.19 and 1.0.0-alpha.18."
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}
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],
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"source": {
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"advisory": "GHSA-46g9-847m-qf8r",
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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/LemmyNet/lemmy/security/advisories/GHSA-46g9-847m-qf8r",
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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": "2026-08-20T13:21:08.131078Z",
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"id": "CVE-2026-54741",
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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": "2026-08-20T13:21:16.938Z"
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}
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}
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]
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}
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} |