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CVE-2026-39894

Cacti is an open source performance and fault management framework. In versions 1.2.30 and below, the locale-dependent decimal formatting in rrdtool_function_update() can corrupt RRDtool metric values. The rrdtool_function_update() function checks metric values with is_numeric() and concatenates them into the RRDtool update command via PHP string interpolation. PHP's string cast of floats is locale-sensitive: if LC_NUMERIC uses comma as decimal separator (e.g., de_DE), a value of 1.5 becomes "1,
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:621a0bf90b871cf40b17f4fae2b3d72f9753a9a085afdc405f038891df22b5c8
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"product":"cacti","vendor":"Cacti","versions":[{"status":"affected","version":"< 1.2.31"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:8e562f62f0084d08f79ca166b381100ab7971919eb5876bea1140bc5279e716b · sha256:c2f45c9b9ea7a3ff… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"HIGH","attackVector":"LOCAL","availabilityImpact":"NONE","baseScore":2.9,"baseSeverity":"LOW","confidentialityImpact":"NONE","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:8e562f62f0084d08f79ca166b381100ab7971919eb5876bea1140bc5279e716b · sha256:c2f45c9b9ea7a3ff… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-474","description":"CWE-474: Use of Function with Inconsistent Implementations","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:8e562f62f0084d08f79ca166b381100ab7971919eb5876bea1140bc5279e716b · sha256:c2f45c9b9ea7a3ff… · /containers/cna/problemTypes/0/descriptions/0

Source references

3 source assertions
{"name":"https://github.com/Cacti/cacti/commit/d2a698854956e9e4e53da9eab5b5719ae40e6893","tags":["x_refsource_MISC"],"url":"https://github.com/Cacti/cacti/commit/d2a698854956e9e4e53da9eab5b5719ae40e6893"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:8e562f62f0084d08f79ca166b381100ab7971919eb5876bea1140bc5279e716b · sha256:c2f45c9b9ea7a3ff… · /containers/cna/references/2
{"name":"https://github.com/Cacti/cacti/issues/7011","tags":["x_refsource_MISC"],"url":"https://github.com/Cacti/cacti/issues/7011"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:8e562f62f0084d08f79ca166b381100ab7971919eb5876bea1140bc5279e716b · sha256:c2f45c9b9ea7a3ff… · /containers/cna/references/1
{"name":"https://github.com/Cacti/cacti/security/advisories/GHSA-23g4-vf2j-94w4","tags":["x_refsource_CONFIRM"],"url":"https://github.com/Cacti/cacti/security/advisories/GHSA-23g4-vf2j-94w4"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:8e562f62f0084d08f79ca166b381100ab7971919eb5876bea1140bc5279e716b · sha256:c2f45c9b9ea7a3ff… · /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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