CVE Explorer

CVE-2026-26989

LibreNMS is an auto-discovering PHP/MySQL/SNMP based network monitoring tool. Versions 25.12.0 and below are affected by a Stored Cross-Site Scripting (XSS) vulnerability in the Alert Rules workflow. An attacker with administrative privileges can inject malicious scripts that execute in the browser context of any user who accesses the Alert Rules page. This issue has been fixed in version 26.2.0.

Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:852fdbcf84a697b1db575f5977bb64d7c3bb048ab6da3b5882448476ee24482b

Known exploited

Not asserted

Disputed

Stale source

Conflicts

Affected products and versions

1 source assertion

{"product":"librenms","vendor":"librenms","versions":[{"status":"affected","version":"< 26.2.0"}]}

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:930975a2b61b25313343f14d4bb67492a83b3f267358075b18cb66379a2943d8 · sha256:9149bfb28490c4ba… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion

{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":4.3,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"HIGH","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:L/I:L/A:L","version":"3.1"},"metric_type":"cvssV3_1"}

cve_program_cvelist_v5cvss
urn:baitaphish:normalized-source-record:v2:930975a2b61b25313343f14d4bb67492a83b3f267358075b18cb66379a2943d8 · sha256:9149bfb28490c4ba… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion

{"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:v2:930975a2b61b25313343f14d4bb67492a83b3f267358075b18cb66379a2943d8 · sha256:9149bfb28490c4ba… · /containers/cna/problemTypes/0/descriptions/0

Source references

4 source assertions

{"name":"https://github.com/librenms/librenms/commit/087608cf9f851189847cb8e8e5ad002e59170c58","tags":["x_refsource_MISC"],"url":"https://github.com/librenms/librenms/commit/087608cf9f851189847cb8e8e5ad002e59170c58"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:930975a2b61b25313343f14d4bb67492a83b3f267358075b18cb66379a2943d8 · sha256:9149bfb28490c4ba… · /containers/cna/references/2

{"name":"https://github.com/librenms/librenms/pull/19039","tags":["x_refsource_MISC"],"url":"https://github.com/librenms/librenms/pull/19039"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:930975a2b61b25313343f14d4bb67492a83b3f267358075b18cb66379a2943d8 · sha256:9149bfb28490c4ba… · /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:v2:930975a2b61b25313343f14d4bb67492a83b3f267358075b18cb66379a2943d8 · sha256:9149bfb28490c4ba… · /containers/cna/references/3

{"name":"https://github.com/librenms/librenms/security/advisories/GHSA-6xmx-xr9p-58p7","tags":["x_refsource_CONFIRM"],"url":"https://github.com/librenms/librenms/security/advisories/GHSA-6xmx-xr9p-58p7"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:930975a2b61b25313343f14d4bb67492a83b3f267358075b18cb66379a2943d8 · sha256:9149bfb28490c4ba… · /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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