CVE Explorer

CVE-2026-44161

Fluentd collects events from various data sources and writes them to files, RDBMS, NoSQL, IaaS, SaaS, Hadoop and so on. Prior to 1.19.3, the Fluentd out_http output plugin allows placeholders such as ${tag} in the endpoint configuration parameter, and if a placeholder value is derived from untrusted input an attacker can control the destination hostname of outbound HTTP requests and force requests to arbitrary internal services. This issue is fixed in version 1.19.3.

Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:c31844ebe7ce8b368aa94fb8c41355357a87ae2852c18590c63ec9e626b15ad7

Known exploited

Not asserted

Disputed

Stale source

Conflicts

Affected products and versions

1 source assertion

{"product":"fluentd","vendor":"fluent","versions":[{"status":"affected","version":"< 1.19.3"}]}

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:9ca0558dd2be1b5db72039f994b957928b3f81a1741bd3f7f0c3f385535824ca · sha256:4aba8181c7915f4f… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion

{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":7.2,"baseSeverity":"HIGH","confidentialityImpact":"LOW","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:L","version":"3.1"},"metric_type":"cvssV3_1"}

cve_program_cvelist_v5cvss
urn:baitaphish:normalized-source-record:v2:9ca0558dd2be1b5db72039f994b957928b3f81a1741bd3f7f0c3f385535824ca · sha256:4aba8181c7915f4f… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion

{"cweId":"CWE-918","description":"CWE-918: Server-Side Request Forgery (SSRF)","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:9ca0558dd2be1b5db72039f994b957928b3f81a1741bd3f7f0c3f385535824ca · sha256:4aba8181c7915f4f… · /containers/cna/problemTypes/0/descriptions/0

Source references

4 source assertions

{"name":"https://github.com/fluent/fluentd/commit/c6a01ea2e0ea01977f8d615f7c6dbfae4cba88c9","tags":["x_refsource_MISC"],"url":"https://github.com/fluent/fluentd/commit/c6a01ea2e0ea01977f8d615f7c6dbfae4cba88c9"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:9ca0558dd2be1b5db72039f994b957928b3f81a1741bd3f7f0c3f385535824ca · sha256:4aba8181c7915f4f… · /containers/cna/references/2

{"name":"https://github.com/fluent/fluentd/pull/5394","tags":["x_refsource_MISC"],"url":"https://github.com/fluent/fluentd/pull/5394"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:9ca0558dd2be1b5db72039f994b957928b3f81a1741bd3f7f0c3f385535824ca · sha256:4aba8181c7915f4f… · /containers/cna/references/1

{"name":"https://github.com/fluent/fluentd/releases/tag/v1.19.3","tags":["x_refsource_MISC"],"url":"https://github.com/fluent/fluentd/releases/tag/v1.19.3"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:9ca0558dd2be1b5db72039f994b957928b3f81a1741bd3f7f0c3f385535824ca · sha256:4aba8181c7915f4f… · /containers/cna/references/3

{"name":"https://github.com/fluent/fluentd/security/advisories/GHSA-72f5-rr8c-r6gr","tags":["x_refsource_CONFIRM"],"url":"https://github.com/fluent/fluentd/security/advisories/GHSA-72f5-rr8c-r6gr"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:9ca0558dd2be1b5db72039f994b957928b3f81a1741bd3f7f0c3f385535824ca · sha256:4aba8181c7915f4f… · /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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