CVE-2026-77351 (GCVE-0-2026-77351)
Vulnerability from cvelistv5 – Published: 2026-08-31 21:15 – Updated: 2026-09-01 13:29
VLAI
EPSS
VEX
Title
Wallos: SSRF via Unvalidated User-Level SMTP Host in Email Notification Settings
Summary
Wallos is an open-source, self-hostable personal subscription tracker. Prior to version 5.0.0, Wallos lets any authenticated user store an arbitrary SMTP host — including private and cloud-metadata IP addresses — in their personal email notification settings, with no server-side SSRF validation. When the scheduled notification cron job runs, it passes the stored host directly to PHPMailer, causing the Wallos server to open an outbound TCP connection to whatever address the attacker specified. This gives a low-privileged attacker a reliable mechanism to probe internal network services from the server's perspective. This issue has been patched in version 5.0.0.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-01 13:23 UTC
CWE
- CWE-918 - Server-Side Request Forgery (SSRF)
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/ellite/Wallos/security/advisor… | x_refsource_CONFIRM |
| https://github.com/ellite/Wallos/commit/11eaf402e… | x_refsource_MISC |
| https://github.com/ellite/Wallos/releases/tag/v5.0.0 | x_refsource_MISC |
Impacted products
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-77351",
"options": [
{
"Exploitation": "poc"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-09-01T13:23:39.293752Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-09-01T13:29:07.182Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "Wallos",
"vendor": "ellite",
"versions": [
{
"status": "affected",
"version": "\u003c 5.0.0"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "Wallos is an open-source, self-hostable personal subscription tracker. Prior to version 5.0.0, Wallos lets any authenticated user store an arbitrary SMTP host \u2014 including private and cloud-metadata IP addresses \u2014 in their personal email notification settings, with no server-side SSRF validation. When the scheduled notification cron job runs, it passes the stored host directly to PHPMailer, causing the Wallos server to open an outbound TCP connection to whatever address the attacker specified. This gives a low-privileged attacker a reliable mechanism to probe internal network services from the server\u0027s perspective. This issue has been patched in version 5.0.0."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "HIGH",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 3.5,
"baseSeverity": "LOW",
"confidentialityImpact": "LOW",
"integrityImpact": "NONE",
"privilegesRequired": "LOW",
"scope": "CHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:N/A:N",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-918",
"description": "CWE-918: Server-Side Request Forgery (SSRF)",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-31T21:15:23.590Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/ellite/Wallos/security/advisories/GHSA-mwqv-gv8x-9jcp",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/ellite/Wallos/security/advisories/GHSA-mwqv-gv8x-9jcp"
},
{
"name": "https://github.com/ellite/Wallos/commit/11eaf402e841a628c68a805694227ce66c45f6f3",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/ellite/Wallos/commit/11eaf402e841a628c68a805694227ce66c45f6f3"
},
{
"name": "https://github.com/ellite/Wallos/releases/tag/v5.0.0",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/ellite/Wallos/releases/tag/v5.0.0"
}
],
"source": {
"advisory": "GHSA-mwqv-gv8x-9jcp",
"discovery": "UNKNOWN"
},
"title": "Wallos: SSRF via Unvalidated User-Level SMTP Host in Email Notification Settings"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-77351",
"datePublished": "2026-08-31T21:15:23.590Z",
"dateReserved": "2026-08-20T19:28:35.244Z",
"dateUpdated": "2026-09-01T13:29:07.182Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2026-77351",
"date": "2026-09-01",
"epss": "0.00182",
"percentile": "0.07848"
},
"nvd": "{\"cve\":{\"id\":\"CVE-2026-77351\",\"sourceIdentifier\":\"security-advisories@github.com\",\"published\":\"2026-08-31T22:17:20.467\",\"lastModified\":\"2026-09-01T14:17:40.350\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"Wallos is an open-source, self-hostable personal subscription tracker. Prior to version 5.0.0, Wallos lets any authenticated user store an arbitrary SMTP host \u2014 including private and cloud-metadata IP addresses \u2014 in their personal email notification settings, with no server-side SSRF validation. When the scheduled notification cron job runs, it passes the stored host directly to PHPMailer, causing the Wallos server to open an outbound TCP connection to whatever address the attacker specified. This gives a low-privileged attacker a reliable mechanism to probe internal network services from the server\u0027s perspective. This issue has been patched in version 5.0.0.\"}],\"affected\":[{\"source\":\"security-advisories@github.com\",\"affectedData\":[{\"vendor\":\"ellite\",\"product\":\"Wallos\",\"versions\":[{\"version\":\"\u003c 5.0.0\",\"status\":\"affected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"security-advisories@github.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:N/A:N\",\"baseScore\":3.5,\"baseSeverity\":\"LOW\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"HIGH\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"CHANGED\",\"confidentialityImpact\":\"LOW\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":1.8,\"impactScore\":1.4}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2026-09-01T13:23:39.293752Z\",\"id\":\"CVE-2026-77351\",\"options\":[{\"exploitation\":\"poc\"},{\"automatable\":\"no\"},{\"technicalImpact\":\"partial\"}],\"role\":\"CISA Coordinator\",\"version\":\"2.0.3\"}}]},\"weaknesses\":[{\"source\":\"security-advisories@github.com\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-918\"}]}],\"references\":[{\"url\":\"https://github.com/ellite/Wallos/commit/11eaf402e841a628c68a805694227ce66c45f6f3\",\"source\":\"security-advisories@github.com\"},{\"url\":\"https://github.com/ellite/Wallos/releases/tag/v5.0.0\",\"source\":\"security-advisories@github.com\"},{\"url\":\"https://github.com/ellite/Wallos/security/advisories/GHSA-mwqv-gv8x-9jcp\",\"source\":\"security-advisories@github.com\"}]}}",
"vulnrichment": {
"containers": "{\"cna\": {\"title\": \"Wallos: SSRF via Unvalidated User-Level SMTP Host in Email Notification Settings\", \"problemTypes\": [{\"descriptions\": [{\"cweId\": \"CWE-918\", \"lang\": \"en\", \"description\": \"CWE-918: Server-Side Request Forgery (SSRF)\", \"type\": \"CWE\"}]}], \"metrics\": [{\"cvssV3_1\": {\"attackComplexity\": \"HIGH\", \"attackVector\": \"NETWORK\", \"availabilityImpact\": \"NONE\", \"baseScore\": 3.5, \"baseSeverity\": \"LOW\", \"confidentialityImpact\": \"LOW\", \"integrityImpact\": \"NONE\", \"privilegesRequired\": \"LOW\", \"scope\": \"CHANGED\", \"userInteraction\": \"NONE\", \"vectorString\": \"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:N/A:N\", \"version\": \"3.1\"}}], \"references\": [{\"name\": \"https://github.com/ellite/Wallos/security/advisories/GHSA-mwqv-gv8x-9jcp\", \"tags\": [\"x_refsource_CONFIRM\"], \"url\": \"https://github.com/ellite/Wallos/security/advisories/GHSA-mwqv-gv8x-9jcp\"}, {\"name\": \"https://github.com/ellite/Wallos/commit/11eaf402e841a628c68a805694227ce66c45f6f3\", \"tags\": [\"x_refsource_MISC\"], \"url\": \"https://github.com/ellite/Wallos/commit/11eaf402e841a628c68a805694227ce66c45f6f3\"}, {\"name\": \"https://github.com/ellite/Wallos/releases/tag/v5.0.0\", \"tags\": [\"x_refsource_MISC\"], \"url\": \"https://github.com/ellite/Wallos/releases/tag/v5.0.0\"}], \"affected\": [{\"vendor\": \"ellite\", \"product\": \"Wallos\", \"versions\": [{\"version\": \"\u003c 5.0.0\", \"status\": \"affected\"}]}], \"providerMetadata\": {\"orgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"shortName\": \"GitHub_M\", \"dateUpdated\": \"2026-08-31T21:15:23.590Z\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"Wallos is an open-source, self-hostable personal subscription tracker. Prior to version 5.0.0, Wallos lets any authenticated user store an arbitrary SMTP host \\u2014 including private and cloud-metadata IP addresses \\u2014 in their personal email notification settings, with no server-side SSRF validation. When the scheduled notification cron job runs, it passes the stored host directly to PHPMailer, causing the Wallos server to open an outbound TCP connection to whatever address the attacker specified. This gives a low-privileged attacker a reliable mechanism to probe internal network services from the server\u0027s perspective. This issue has been patched in version 5.0.0.\"}], \"source\": {\"advisory\": \"GHSA-mwqv-gv8x-9jcp\", \"discovery\": \"UNKNOWN\"}}, \"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-77351\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"poc\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-09-01T13:23:39.293752Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-09-01T13:25:00.515Z\"}}]}",
"cveMetadata": "{\"cveId\": \"CVE-2026-77351\", \"assignerOrgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"state\": \"PUBLISHED\", \"assignerShortName\": \"GitHub_M\", \"dateReserved\": \"2026-08-20T19:28:35.244Z\", \"datePublished\": \"2026-08-31T21:15:23.590Z\", \"dateUpdated\": \"2026-09-01T13:29:07.182Z\"}",
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
Loading…
Loading…
Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Loading…
The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Loading…
Loading…