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CVE-2026-55455

Appsmith is a platform to build admin panels, internal tools, and dashboards. Prior to 2.1, the outbound HTTP host filter applied by WebClientUtils (used by the REST API and GraphQL datasource plugins) validates hosts against an exact-match string denylist. The comprehensive address-class check (loopback, any-local, link-local, fc00::/7) exists only on a separate code path used by SMTP, not by the HTTP plugin path. As a result, an authenticated user can craft outbound requests that reach loopbac
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:ed016472eb203d4284f347df9ff24669bc270a0014a64e7b80b7baaf73c8c423
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"product":"appsmith","vendor":"appsmithorg","versions":[{"status":"affected","version":"< 2.1"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:55933befc2cc920a78fdce3951dfdf7a5af910e0816b115c6e0055768088376b · sha256:d482b783c3770b6b… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":5.3,"baseSeverity":"MEDIUM","privilegesRequired":"LOW","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"LOW","vulnIntegrityImpact":"LOW"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:55933befc2cc920a78fdce3951dfdf7a5af910e0816b115c6e0055768088376b · sha256:d482b783c3770b6b… · /containers/cna/metrics/0/cvssV4_0

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:v2:55933befc2cc920a78fdce3951dfdf7a5af910e0816b115c6e0055768088376b · sha256:d482b783c3770b6b… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions
{"tags":["exploit"],"url":"https://github.com/appsmithorg/appsmith/security/advisories/GHSA-m23h-pvf3-2m7p"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:55933befc2cc920a78fdce3951dfdf7a5af910e0816b115c6e0055768088376b · sha256:d482b783c3770b6b… · /containers/adp/0/references/0
{"name":"https://github.com/appsmithorg/appsmith/security/advisories/GHSA-m23h-pvf3-2m7p","tags":["x_refsource_CONFIRM"],"url":"https://github.com/appsmithorg/appsmith/security/advisories/GHSA-m23h-pvf3-2m7p"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:55933befc2cc920a78fdce3951dfdf7a5af910e0816b115c6e0055768088376b · sha256:d482b783c3770b6b… · /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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