CVE-2026-33537 (GCVE-0-2026-33537)
Vulnerability from cvelistv5
Published
2026-03-26 20:01
Modified
2026-03-27 19:46
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-918 - Server-Side Request Forgery (SSRF)
Summary
Lychee is a free, open-source photo-management tool. The patch introduced for GHSA-cpgw-wgf3-xc6v (SSRF via `Photo::fromUrl`) contains an incomplete IP validation check that fails to block loopback addresses and link-local addresses. Prior to version 7.5.1, an authenticated user can still reach internal services using direct IP addresses, bypassing all four protection configuration settings even when they are set to their secure defaults. Version 7.5.1 contains a fix for the issue.
References
| URL | Tags | |
|---|---|---|
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"id": "CVE-2026-33537",
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{
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"Technical Impact": "partial"
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"role": "CISA Coordinator",
"timestamp": "2026-03-27T19:46:02.228439Z",
"version": "2.0.3"
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"dateUpdated": "2026-03-27T19:46:28.419Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
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"title": "CISA ADP Vulnrichment"
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"cna": {
"affected": [
{
"product": "Lychee",
"vendor": "LycheeOrg",
"versions": [
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"status": "affected",
"version": "\u003c 7.5.1"
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"value": "Lychee is a free, open-source photo-management tool. The patch introduced for GHSA-cpgw-wgf3-xc6v (SSRF via `Photo::fromUrl`) contains an incomplete IP validation check that fails to block loopback addresses and link-local addresses. Prior to version 7.5.1, an authenticated user can still reach internal services using direct IP addresses, bypassing all four protection configuration settings even when they are set to their secure defaults. Version 7.5.1 contains a fix for the issue."
}
],
"metrics": [
{
"cvssV4_0": {
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"attackVector": "NETWORK",
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"privilegesRequired": "LOW",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "LOW",
"subIntegrityImpact": "NONE",
"userInteraction": "NONE",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N",
"version": "4.0",
"vulnAvailabilityImpact": "NONE",
"vulnConfidentialityImpact": "LOW",
"vulnIntegrityImpact": "NONE"
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"descriptions": [
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"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
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"references": [
{
"name": "https://github.com/LycheeOrg/Lychee/security/advisories/GHSA-vq6w-prpf-h287",
"tags": [
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],
"url": "https://github.com/LycheeOrg/Lychee/security/advisories/GHSA-vq6w-prpf-h287"
},
{
"name": "https://github.com/LycheeOrg/Lychee/commit/41386677681d18cd04e42a35b50bd88bf53a4a6a",
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"url": "https://github.com/LycheeOrg/Lychee/commit/41386677681d18cd04e42a35b50bd88bf53a4a6a"
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],
"source": {
"advisory": "GHSA-vq6w-prpf-h287",
"discovery": "UNKNOWN"
},
"title": "Lychee has SSRF bypass via incomplete IP validation in Photo::fromUrl \u2014 loopback and link-local IPs not blocked"
}
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"cveId": "CVE-2026-33537",
"datePublished": "2026-03-26T20:01:19.377Z",
"dateReserved": "2026-03-20T18:05:11.831Z",
"dateUpdated": "2026-03-27T19:46:28.419Z",
"state": "PUBLISHED"
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"dataType": "CVE_RECORD",
"dataVersion": "5.2"
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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