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CVE-2026-27633

TinyWeb is a web server (HTTP, HTTPS) written in Delphi for Win32. Versions prior to version 2.02 have a Denial of Service (DoS) vulnerability via memory exhaustion. Unauthenticated remote attackers can send an HTTP POST request to the server with an exceptionally large `Content-Length` header (e.g., `2147483647`). The server continuously allocates memory for the request body (`EntityBody`) while streaming the payload without enforcing any maximum limit, leading to all available memory being con
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:c023f72191ed671370f9cc6b0996194d52e4530c6fa67f70cfc6b30ee90c7cf1
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"product":"TinyWeb","vendor":"maximmasiutin","versions":[{"status":"affected","version":"< 2.02"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:ea9f49f77bd1b9eb973513ca7ccfd7048d4c3f40f02ea9029e56d9f5f38741f8 · sha256:ca724537851345ad… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":8.7,"baseSeverity":"HIGH","privilegesRequired":"NONE","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:ea9f49f77bd1b9eb973513ca7ccfd7048d4c3f40f02ea9029e56d9f5f38741f8 · sha256:ca724537851345ad… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

1 source assertion
{"cweId":"CWE-400","description":"CWE-400: Uncontrolled Resource Consumption","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:ea9f49f77bd1b9eb973513ca7ccfd7048d4c3f40f02ea9029e56d9f5f38741f8 · sha256:ca724537851345ad… · /containers/cna/problemTypes/0/descriptions/0

Source references

3 source assertions
{"name":"https://github.com/maximmasiutin/TinyWeb/commit/1cb5a1d","tags":["x_refsource_MISC"],"url":"https://github.com/maximmasiutin/TinyWeb/commit/1cb5a1d"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:ea9f49f77bd1b9eb973513ca7ccfd7048d4c3f40f02ea9029e56d9f5f38741f8 · sha256:ca724537851345ad… · /containers/cna/references/1
{"name":"https://github.com/maximmasiutin/TinyWeb/security/advisories/GHSA-992w-gmcm-fmgr","tags":["x_refsource_CONFIRM"],"url":"https://github.com/maximmasiutin/TinyWeb/security/advisories/GHSA-992w-gmcm-fmgr"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:ea9f49f77bd1b9eb973513ca7ccfd7048d4c3f40f02ea9029e56d9f5f38741f8 · sha256:ca724537851345ad… · /containers/cna/references/0
{"name":"https://www.masiutin.net/tinyweb-cve-2026-27633.html","tags":["x_refsource_MISC"],"url":"https://www.masiutin.net/tinyweb-cve-2026-27633.html"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:ea9f49f77bd1b9eb973513ca7ccfd7048d4c3f40f02ea9029e56d9f5f38741f8 · sha256:ca724537851345ad… · /containers/cna/references/2

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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