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CVE-2026-27016

LibreNMS is an auto-discovering PHP/MySQL/SNMP based network monitoring tool. Versions 24.10.0 through 26.1.1 are vulnerable to Stored XSS via the unit parameter in Custom OID. The Custom OID functionality lacks strip_tags() sanitization while other fields (name, oid, datatype) are sanitized. The unsanitized value is stored in the database and rendered without HTML escaping. This issue is fixed in version 26.2.0.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:f412bc751c9e24d9c747637516a4b69f7ad6d9dfd51ffac8dd7fb0389f200e06
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

{"cweId":"CWE-116","description":"CWE-116: Improper Encoding or Escaping of Output","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:e4adbda497329f673c4d54e0355b0fc98ac7c1ba9cb0b091784210d99ea71f7f · sha256:66f99d8edfb7d143… · /containers/cna/problemTypes/1/descriptions/0

{"cweId":"CWE-79","description":"CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:e4adbda497329f673c4d54e0355b0fc98ac7c1ba9cb0b091784210d99ea71f7f · sha256:66f99d8edfb7d143… · /containers/cna/problemTypes/0/descriptions/0

Affected products and versions

1 source assertion
{"product":"librenms","vendor":"librenms","versions":[{"status":"affected","version":">= 24.10.0, < 26.2.0"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:e4adbda497329f673c4d54e0355b0fc98ac7c1ba9cb0b091784210d99ea71f7f · sha256:66f99d8edfb7d143… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":5.4,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"LOW","scope":"CHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:e4adbda497329f673c4d54e0355b0fc98ac7c1ba9cb0b091784210d99ea71f7f · sha256:66f99d8edfb7d143… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

2 source assertions
{"cweId":"CWE-116","description":"CWE-116: Improper Encoding or Escaping of Output","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:e4adbda497329f673c4d54e0355b0fc98ac7c1ba9cb0b091784210d99ea71f7f · sha256:66f99d8edfb7d143… · /containers/cna/problemTypes/1/descriptions/0
{"cweId":"CWE-79","description":"CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:e4adbda497329f673c4d54e0355b0fc98ac7c1ba9cb0b091784210d99ea71f7f · sha256:66f99d8edfb7d143… · /containers/cna/problemTypes/0/descriptions/0

Source references

4 source assertions
{"name":"https://github.com/librenms/librenms/commit/3bea263e02441690c01dea7fa3fe6ffec94af335","tags":["x_refsource_MISC"],"url":"https://github.com/librenms/librenms/commit/3bea263e02441690c01dea7fa3fe6ffec94af335"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:e4adbda497329f673c4d54e0355b0fc98ac7c1ba9cb0b091784210d99ea71f7f · sha256:66f99d8edfb7d143… · /containers/cna/references/2
{"name":"https://github.com/librenms/librenms/pull/19040","tags":["x_refsource_MISC"],"url":"https://github.com/librenms/librenms/pull/19040"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:e4adbda497329f673c4d54e0355b0fc98ac7c1ba9cb0b091784210d99ea71f7f · sha256:66f99d8edfb7d143… · /containers/cna/references/1
{"name":"https://github.com/librenms/librenms/releases/tag/26.2.0","tags":["x_refsource_MISC"],"url":"https://github.com/librenms/librenms/releases/tag/26.2.0"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:e4adbda497329f673c4d54e0355b0fc98ac7c1ba9cb0b091784210d99ea71f7f · sha256:66f99d8edfb7d143… · /containers/cna/references/3
{"name":"https://github.com/librenms/librenms/security/advisories/GHSA-fqx6-693c-f55g","tags":["x_refsource_CONFIRM"],"url":"https://github.com/librenms/librenms/security/advisories/GHSA-fqx6-693c-f55g"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:e4adbda497329f673c4d54e0355b0fc98ac7c1ba9cb0b091784210d99ea71f7f · sha256:66f99d8edfb7d143… · /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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