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CVE-2026-38427

An issue in fetch_jpg() in xdrv_10_scripter.ino in Tasmota through 15.3.0.3 allows a remote attacker to cause heap buffer overflow. The Content-Length from a JPEG stream is stored in a uint16_t variable; values above 65535 wrap around, causing allocation of a smaller buffer than the data actually read.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:4341a981e23ea3ff5b17a6c8f59eb09cac1ab00c30d19d475c46378cd659ebe5
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 2 assertions

{"description":"n/a","lang":"en","type":"text"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:1a61be23fb0e9c056b10aaf417e2301442a45c1aa9809f1610035ff9ebbaa401 · sha256:5f3839f6b37d2554… · /containers/cna/problemTypes/0/descriptions/0

{"cweId":"CWE-122","description":"CWE-122 Heap-based Buffer Overflow","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:1a61be23fb0e9c056b10aaf417e2301442a45c1aa9809f1610035ff9ebbaa401 · sha256:5f3839f6b37d2554… · /containers/adp/0/problemTypes/0/descriptions/0

Affected products and versions

1 source assertion
{"product":"n/a","vendor":"n/a","versions":[{"status":"affected","version":"n/a"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:1a61be23fb0e9c056b10aaf417e2301442a45c1aa9809f1610035ff9ebbaa401 · sha256:5f3839f6b37d2554… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":7.3,"baseSeverity":"HIGH","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:1a61be23fb0e9c056b10aaf417e2301442a45c1aa9809f1610035ff9ebbaa401 · sha256:5f3839f6b37d2554… · /containers/adp/0/metrics/0/cvssV3_1

CWE assertions

2 source assertions
{"description":"n/a","lang":"en","type":"text"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:1a61be23fb0e9c056b10aaf417e2301442a45c1aa9809f1610035ff9ebbaa401 · sha256:5f3839f6b37d2554… · /containers/cna/problemTypes/0/descriptions/0
{"cweId":"CWE-122","description":"CWE-122 Heap-based Buffer Overflow","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:1a61be23fb0e9c056b10aaf417e2301442a45c1aa9809f1610035ff9ebbaa401 · sha256:5f3839f6b37d2554… · /containers/adp/0/problemTypes/0/descriptions/0

Source references

3 source assertions
{"url":"https://github.com/arendst/Tasmota/blob/c207cc2/tasmota/tasmota_xdrv_driver/xdrv_10_scripter.ino"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:1a61be23fb0e9c056b10aaf417e2301442a45c1aa9809f1610035ff9ebbaa401 · sha256:5f3839f6b37d2554… · /containers/cna/references/0
{"url":"https://github.com/sermikr0/CVE-2026-38427"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:1a61be23fb0e9c056b10aaf417e2301442a45c1aa9809f1610035ff9ebbaa401 · sha256:5f3839f6b37d2554… · /containers/cna/references/1
{"tags":["exploit"],"url":"https://github.com/sermikr0/CVE-2026-38427"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:1a61be23fb0e9c056b10aaf417e2301442a45c1aa9809f1610035ff9ebbaa401 · sha256:5f3839f6b37d2554… · /containers/adp/0/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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