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CVE-2026-56227

Capgo before 12.128.2 contains a server-side request forgery vulnerability in webhook URL validation that allows loopback and internal addresses. Organization admins can configure webhooks pointing to localhost or 127.0.0.1, and when triggered, the backend performs outbound requests to these addresses with error responses disclosed to users.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:4c5767453c5be3f79eb9d49fd5bf186380c5309a6320f8291e8bb4c599965468
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cvss · 2 assertions

{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":5.4,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N","version":"3.1"},"metric_type":"cvssV3_1"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:6befdaa15a6573382edace4ea443c2fbd573f0d134d0676ab3dbd961558e9548 · sha256:81ee398ffa2164a9… · /containers/cna/metrics/1/cvssV3_1

{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":5.3,"baseSeverity":"MEDIUM","exploitMaturity":"NOT_DEFINED","privilegesRequired":"LOW","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"LOW","subConfidentialityImpact":"LOW","subIntegrityImpact":"LOW","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:L/SI:L/SA:L","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"LO…

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:6befdaa15a6573382edace4ea443c2fbd573f0d134d0676ab3dbd961558e9548 · sha256:81ee398ffa2164a9… · /containers/cna/metrics/0/cvssV4_0

Affected products and versions

1 source assertion
{"defaultStatus":"unaffected","product":"Capgo","vendor":"Capgo","versions":[{"lessThan":"12.128.2","status":"affected","version":"0","versionType":"semver"},{"status":"unaffected","version":"12.128.2","versionType":"semver"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:6befdaa15a6573382edace4ea443c2fbd573f0d134d0676ab3dbd961558e9548 · sha256:81ee398ffa2164a9… · /containers/cna/affected/0

Provider-owned CVSS observations

2 source assertions
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":5.4,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:6befdaa15a6573382edace4ea443c2fbd573f0d134d0676ab3dbd961558e9548 · sha256:81ee398ffa2164a9… · /containers/cna/metrics/1/cvssV3_1
{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":5.3,"baseSeverity":"MEDIUM","exploitMaturity":"NOT_DEFINED","privilegesRequired":"LOW","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"LOW","subConfidentialityImpact":"LOW","subIntegrityImpact":"LOW","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:L/SI:L/SA:L","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"LO…
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:6befdaa15a6573382edace4ea443c2fbd573f0d134d0676ab3dbd961558e9548 · sha256:81ee398ffa2164a9… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

1 source assertion
{"cweId":"CWE-918","description":"Server-Side Request Forgery (SSRF)","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:6befdaa15a6573382edace4ea443c2fbd573f0d134d0676ab3dbd961558e9548 · sha256:81ee398ffa2164a9… · /containers/cna/problemTypes/0/descriptions/0

Source references

3 source assertions
{"name":"GHSA Advisory GHSA-48hc-53hv-6x3f","tags":["vendor-advisory"],"url":"https://github.com/Cap-go/capgo/security/advisories/GHSA-48hc-53hv-6x3f"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:6befdaa15a6573382edace4ea443c2fbd573f0d134d0676ab3dbd961558e9548 · sha256:81ee398ffa2164a9… · /containers/cna/references/0
{"tags":["exploit"],"url":"https://github.com/Cap-go/capgo/security/advisories/GHSA-48hc-53hv-6x3f"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:6befdaa15a6573382edace4ea443c2fbd573f0d134d0676ab3dbd961558e9548 · sha256:81ee398ffa2164a9… · /containers/adp/0/references/0
{"name":"VulnCheck Advisory: Capgo - Server-Side Request Forgery via Webhook URL Validation","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/capgo-server-side-request-forgery-via-webhook-url-validation"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:6befdaa15a6573382edace4ea443c2fbd573f0d134d0676ab3dbd961558e9548 · sha256:81ee398ffa2164a9… · /containers/cna/references/1

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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