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CVE-2026-33534

EspoCRM is an open source customer relationship management application. Versions 9.3.3 and below have an authenticated Server-Side Request Forgery (SSRF) vulnerability that allows bypassing the internal-host validation logic by using alternative IPv4 representations such as octal notation (e.g., 0177.0.0.1 instead of 127.0.0.1). This is caused by HostCheck::isNotInternalHost() function relying on PHP's filter_var(..., FILTER_VALIDATE_IP), which does not recognize alternative IP formats, causing
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:903db50972c7a4df7fc90a755129c4a6999388df55956fc841320471ac035fc6
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"product":"espocrm","vendor":"espocrm","versions":[{"status":"affected","version":"< 9.3.4"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:3514185369047e7164c4e059e78698e0c4e1ae2b077389eac67f2d68574fcb01 · sha256:0fda4fffd83751e6… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":4.3,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"NONE","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:3514185369047e7164c4e059e78698e0c4e1ae2b077389eac67f2d68574fcb01 · sha256:0fda4fffd83751e6… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-918","description":"CWE-918: Server-Side Request Forgery (SSRF)","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:3514185369047e7164c4e059e78698e0c4e1ae2b077389eac67f2d68574fcb01 · sha256:0fda4fffd83751e6… · /containers/cna/problemTypes/0/descriptions/0

Source references

3 source assertions
{"name":"https://github.com/espocrm/espocrm/releases/tag/9.3.4","tags":["x_refsource_MISC"],"url":"https://github.com/espocrm/espocrm/releases/tag/9.3.4"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:3514185369047e7164c4e059e78698e0c4e1ae2b077389eac67f2d68574fcb01 · sha256:0fda4fffd83751e6… · /containers/cna/references/1
{"tags":["exploit"],"url":"https://github.com/espocrm/espocrm/security/advisories/GHSA-h7gx-8gwv-7g73"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:3514185369047e7164c4e059e78698e0c4e1ae2b077389eac67f2d68574fcb01 · sha256:0fda4fffd83751e6… · /containers/adp/0/references/0
{"name":"https://github.com/espocrm/espocrm/security/advisories/GHSA-h7gx-8gwv-7g73","tags":["x_refsource_CONFIRM"],"url":"https://github.com/espocrm/espocrm/security/advisories/GHSA-h7gx-8gwv-7g73"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:3514185369047e7164c4e059e78698e0c4e1ae2b077389eac67f2d68574fcb01 · sha256:0fda4fffd83751e6… · /containers/cna/references/0

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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