133 lines
5.5 KiB
JSON
133 lines
5.5 KiB
JSON
{
|
|
"dataType": "CVE_RECORD",
|
|
"dataVersion": "5.2",
|
|
"cveMetadata": {
|
|
"cveId": "CVE-2026-42181",
|
|
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
|
|
"state": "PUBLISHED",
|
|
"assignerShortName": "GitHub_M",
|
|
"dateReserved": "2026-04-25T01:53:21.582Z",
|
|
"datePublished": "2026-05-08T19:26:07.763Z",
|
|
"dateUpdated": "2026-05-11T16:01:01.124Z"
|
|
},
|
|
"containers": {
|
|
"cna": {
|
|
"title": "Lemmy: SSRF and internal image disclosure in post link metadata via unvalidated og:image",
|
|
"problemTypes": [
|
|
{
|
|
"descriptions": [
|
|
{
|
|
"cweId": "CWE-918",
|
|
"lang": "en",
|
|
"description": "CWE-918: Server-Side Request Forgery (SSRF)",
|
|
"type": "CWE"
|
|
}
|
|
]
|
|
}
|
|
],
|
|
"metrics": [
|
|
{
|
|
"cvssV3_1": {
|
|
"attackComplexity": "LOW",
|
|
"attackVector": "NETWORK",
|
|
"availabilityImpact": "NONE",
|
|
"baseScore": 6.5,
|
|
"baseSeverity": "MEDIUM",
|
|
"confidentialityImpact": "HIGH",
|
|
"integrityImpact": "NONE",
|
|
"privilegesRequired": "LOW",
|
|
"scope": "UNCHANGED",
|
|
"userInteraction": "NONE",
|
|
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
|
|
"version": "3.1"
|
|
}
|
|
}
|
|
],
|
|
"references": [
|
|
{
|
|
"name": "https://github.com/LemmyNet/lemmy/security/advisories/GHSA-h6hf-9846-xwrq",
|
|
"tags": [
|
|
"x_refsource_CONFIRM"
|
|
],
|
|
"url": "https://github.com/LemmyNet/lemmy/security/advisories/GHSA-h6hf-9846-xwrq"
|
|
},
|
|
{
|
|
"name": "https://github.com/LemmyNet/lemmy/releases/tag/0.19.18",
|
|
"tags": [
|
|
"x_refsource_MISC"
|
|
],
|
|
"url": "https://github.com/LemmyNet/lemmy/releases/tag/0.19.18"
|
|
}
|
|
],
|
|
"affected": [
|
|
{
|
|
"vendor": "LemmyNet",
|
|
"product": "lemmy",
|
|
"versions": [
|
|
{
|
|
"version": "< 0.19.18",
|
|
"status": "affected"
|
|
}
|
|
]
|
|
}
|
|
],
|
|
"providerMetadata": {
|
|
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
|
|
"shortName": "GitHub_M",
|
|
"dateUpdated": "2026-05-08T19:26:07.763Z"
|
|
},
|
|
"descriptions": [
|
|
{
|
|
"lang": "en",
|
|
"value": "Lemmy is a link aggregator and forum for the fediverse. Prior to version 0.19.18, Lemmy fetches metadata for user-supplied post URLs and, under the default StoreLinkPreviews image mode, downloads the preview image through local pict-rs. While the top-level page URL is checked against internal IP ranges, the extracted og:image URL is not subject to the same restriction. As a result, an authenticated low-privileged user can submit an attacker-controlled public page whose Open Graph image points to an internal image endpoint. Lemmy will fetch that internal image server-side and store a local thumbnail that can then be served back to users. This issue has been patched in version 0.19.18."
|
|
}
|
|
],
|
|
"source": {
|
|
"advisory": "GHSA-h6hf-9846-xwrq",
|
|
"discovery": "UNKNOWN"
|
|
}
|
|
},
|
|
"adp": [
|
|
{
|
|
"references": [
|
|
{
|
|
"url": "https://github.com/LemmyNet/lemmy/security/advisories/GHSA-h6hf-9846-xwrq",
|
|
"tags": [
|
|
"exploit"
|
|
]
|
|
}
|
|
],
|
|
"metrics": [
|
|
{
|
|
"other": {
|
|
"type": "ssvc",
|
|
"content": {
|
|
"timestamp": "2026-05-11T16:00:57.536211Z",
|
|
"id": "CVE-2026-42181",
|
|
"options": [
|
|
{
|
|
"Exploitation": "poc"
|
|
},
|
|
{
|
|
"Automatable": "no"
|
|
},
|
|
{
|
|
"Technical Impact": "partial"
|
|
}
|
|
],
|
|
"role": "CISA Coordinator",
|
|
"version": "2.0.3"
|
|
}
|
|
}
|
|
}
|
|
],
|
|
"title": "CISA ADP Vulnrichment",
|
|
"providerMetadata": {
|
|
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
|
|
"shortName": "CISA-ADP",
|
|
"dateUpdated": "2026-05-11T16:01:01.124Z"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
} |