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CVE-2026-11826

OpenPLC_v3 contains a heap-based buffer overflow in the getData() function in webserver/core/modbus_master.cpp. getData() reads characters between two delimiters into a caller-supplied buffer with no size parameter and no bounds check. In parseConfig() the function is invoked with the 100-byte heap-allocated MB_device.dev_name field. An authenticated attacker with access to the OpenPLC web interface can send a crafted HTTP POST to the /modbus endpoint with an oversized device_name value; the val
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:16e5f1224a59751ed94a597b71537f5537632479f17f2e1fe775adabd967dfdf
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":"HIGH","baseScore":8.8,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"metric_type":"cvssV3_1"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:bba73df3d6d5ca2b9b5bc5c48856d0b444c5055a198d86b93120445713efd30a · sha256:90221a3525a8a66b… · /containers/cna/metrics/1/cvssV3_1

{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":8.7,"baseSeverity":"HIGH","privilegesRequired":"LOW","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"HIGH…

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:bba73df3d6d5ca2b9b5bc5c48856d0b444c5055a198d86b93120445713efd30a · sha256:90221a3525a8a66b… · /containers/cna/metrics/0/cvssV4_0

Affected products and versions

1 source assertion
{"defaultStatus":"affected","product":"OpenPLC_v3","vendor":"openplcproject","versions":[{"lessThanOrEqual":"b470206","status":"affected","version":"0","versionType":"git"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:bba73df3d6d5ca2b9b5bc5c48856d0b444c5055a198d86b93120445713efd30a · sha256:90221a3525a8a66b… · /containers/cna/affected/0

Provider-owned CVSS observations

2 source assertions
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":8.8,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:bba73df3d6d5ca2b9b5bc5c48856d0b444c5055a198d86b93120445713efd30a · sha256:90221a3525a8a66b… · /containers/cna/metrics/1/cvssV3_1
{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":8.7,"baseSeverity":"HIGH","privilegesRequired":"LOW","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"HIGH…
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:bba73df3d6d5ca2b9b5bc5c48856d0b444c5055a198d86b93120445713efd30a · sha256:90221a3525a8a66b… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

1 source assertion
{"cweId":"CWE-122","description":"Heap-based Buffer Overflow","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:bba73df3d6d5ca2b9b5bc5c48856d0b444c5055a198d86b93120445713efd30a · sha256:90221a3525a8a66b… · /containers/cna/problemTypes/0/descriptions/0

Source references

4 source assertions
{"name":"GitHub Gist","tags":["technical-description"],"url":"https://gist.github.com/Shukhrat-03/5cf1825b72e485ef98a32958dfbc611a#security-vulnerability-report"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:bba73df3d6d5ca2b9b5bc5c48856d0b444c5055a198d86b93120445713efd30a · sha256:90221a3525a8a66b… · /containers/cna/references/0
{"name":"Product","tags":["product"],"url":"https://github.com/thiagoralves/OpenPLC_v3"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:bba73df3d6d5ca2b9b5bc5c48856d0b444c5055a198d86b93120445713efd30a · sha256:90221a3525a8a66b… · /containers/cna/references/2
{"name":"Patch Commit","tags":["patch"],"url":"https://github.com/thiagoralves/OpenPLC_v3/commit/b4702061dc14d1024856f71b4543298d77007b88"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:bba73df3d6d5ca2b9b5bc5c48856d0b444c5055a198d86b93120445713efd30a · sha256:90221a3525a8a66b… · /containers/cna/references/1
{"tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/openplc-v3-heap-based-buffer-overflow-in-modbus-master-getdata"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:bba73df3d6d5ca2b9b5bc5c48856d0b444c5055a198d86b93120445713efd30a · sha256:90221a3525a8a66b… · /containers/cna/references/3

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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