Search criteria
1 vulnerability by janmojzis
CVE-2026-4541 (GCVE-0-2026-4541)
Vulnerability from cvelistv5 – Published: 2026-03-22 08:35 – Updated: 2026-04-18 03:39 X_Open Source
VLAI
Title
janmojzis tinyssh Ed25519 Signature crypto_sign_ed25519_tinyssh.c signature verification
Summary
A flaw has been found in janmojzis tinyssh up to 20250501. Impacted is an unknown function of the file tinyssh/crypto_sign_ed25519_tinyssh.c of the component Ed25519 Signature Handler. This manipulation causes improper verification of cryptographic signature. The attack is restricted to local execution. The attack's complexity is rated as high. The exploitability is considered difficult. The exploit has been published and may be used. Upgrading to version 20260301 is recommended to address this issue. Patch name: 9c87269607e0d7d20174df742accc49c042cff17. Upgrading the affected component is recommended.
Severity
CWE
Assigner
References
9 references
| URL | Tags |
|---|---|
| https://vuldb.com/vuln/352358 | vdb-entry |
| https://vuldb.com/vuln/352358/cti | signaturepermissions-required |
| https://vuldb.com/submit/774687 | third-party-advisory |
| https://github.com/janmojzis/tinyssh/issues/101 | issue-tracking |
| https://github.com/janmojzis/tinyssh/pull/102 | issue-trackingpatch |
| https://github.com/janmojzis/tinyssh/issues/101#i… | exploitissue-tracking |
| https://github.com/janmojzis/tinyssh/commit/9c872… | patch |
| https://github.com/janmojzis/tinyssh/releases/tag… | patch |
| https://github.com/janmojzis/tinyssh/ | product |
Impacted products
Credits
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-4541",
"options": [
{
"Exploitation": "poc"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-03-23T15:33:32.521628Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-03-23T15:33:50.378Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"modules": [
"Ed25519 Signature Handler"
],
"product": "tinyssh",
"vendor": "janmojzis",
"versions": [
{
"status": "affected",
"version": "20250501"
},
{
"status": "unaffected",
"version": "20260301"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "reporter",
"value": "pythok (VulDB User)"
}
],
"descriptions": [
{
"lang": "en",
"value": "A flaw has been found in janmojzis tinyssh up to 20250501. Impacted is an unknown function of the file tinyssh/crypto_sign_ed25519_tinyssh.c of the component Ed25519 Signature Handler. This manipulation causes improper verification of cryptographic signature. The attack is restricted to local execution. The attack\u0027s complexity is rated as high. The exploitability is considered difficult. The exploit has been published and may be used. Upgrading to version 20260301 is recommended to address this issue. Patch name: 9c87269607e0d7d20174df742accc49c042cff17. Upgrading the affected component is recommended."
}
],
"metrics": [
{
"cvssV4_0": {
"baseScore": 2,
"baseSeverity": "LOW",
"vectorString": "CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P",
"version": "4.0"
}
},
{
"cvssV3_1": {
"baseScore": 2.5,
"baseSeverity": "LOW",
"vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N/E:P/RL:O/RC:C",
"version": "3.1"
}
},
{
"cvssV3_0": {
"baseScore": 2.5,
"baseSeverity": "LOW",
"vectorString": "CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N/E:P/RL:O/RC:C",
"version": "3.0"
}
},
{
"cvssV2_0": {
"baseScore": 1,
"vectorString": "AV:L/AC:H/Au:S/C:N/I:P/A:N/E:POC/RL:OF/RC:C",
"version": "2.0"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-347",
"description": "Improper Verification of Cryptographic Signature",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-345",
"description": "Insufficient Verification of Data Authenticity",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-04-18T03:39:33.191Z",
"orgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
"shortName": "VulDB"
},
"references": [
{
"name": "VDB-352358 | janmojzis tinyssh Ed25519 Signature crypto_sign_ed25519_tinyssh.c signature verification",
"tags": [
"vdb-entry"
],
"url": "https://vuldb.com/vuln/352358"
},
{
"name": "VDB-352358 | CTI Indicators (IOB, IOC, IOA)",
"tags": [
"signature",
"permissions-required"
],
"url": "https://vuldb.com/vuln/352358/cti"
},
{
"name": "Submit #774687 | GitHub tinyssh 20250501 Cryptographic Issues",
"tags": [
"third-party-advisory"
],
"url": "https://vuldb.com/submit/774687"
},
{
"tags": [
"issue-tracking"
],
"url": "https://github.com/janmojzis/tinyssh/issues/101"
},
{
"tags": [
"issue-tracking",
"patch"
],
"url": "https://github.com/janmojzis/tinyssh/pull/102"
},
{
"tags": [
"exploit",
"issue-tracking"
],
"url": "https://github.com/janmojzis/tinyssh/issues/101#issue-3983586116"
},
{
"tags": [
"patch"
],
"url": "https://github.com/janmojzis/tinyssh/commit/9c87269607e0d7d20174df742accc49c042cff17"
},
{
"tags": [
"patch"
],
"url": "https://github.com/janmojzis/tinyssh/releases/tag/20260301"
},
{
"tags": [
"product"
],
"url": "https://github.com/janmojzis/tinyssh/"
}
],
"tags": [
"x_open-source"
],
"timeline": [
{
"lang": "en",
"time": "2026-03-01T00:00:00.000Z",
"value": "Countermeasure disclosed"
},
{
"lang": "en",
"time": "2026-03-21T00:00:00.000Z",
"value": "Advisory disclosed"
},
{
"lang": "en",
"time": "2026-03-21T01:00:00.000Z",
"value": "VulDB entry created"
},
{
"lang": "en",
"time": "2026-03-23T05:12:55.000Z",
"value": "VulDB entry last update"
}
],
"title": "janmojzis tinyssh Ed25519 Signature crypto_sign_ed25519_tinyssh.c signature verification"
}
},
"cveMetadata": {
"assignerOrgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
"assignerShortName": "VulDB",
"cveId": "CVE-2026-4541",
"datePublished": "2026-03-22T08:35:03.623Z",
"dateReserved": "2026-03-21T15:10:27.592Z",
"dateUpdated": "2026-04-18T03:39:33.191Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}