The vulnerabilities of plugins in_http, in_splunk, and in_elasticsearch in the Fluent Bit log collection and processing tool allow attackers to disclose and modify sensitive information.

The vulnerability of plugins inhttp, insplunk, and inelasticsearch, which are tools for collecting and processing logs with Fluent Bit, is related to improper type checking of input data when processing the tagkey parameter. Exploitation of this vulnerability can allow an attacker to disclose and...

CVE-2025-12978

Fluent Bit inhttp, insplunk, and inelasticsearch input plugins contain a flaw in the tagkey validation logic that fails to enforce exact key-length matching. This allows crafted inputs where a tag prefix is incorrectly treated as a full match. A remote attacker with authenticated or exposed acces...

CVE-2025-12970

The extractname function in Fluent Bit indocker input plugin copies container names into a fixed size stack buffer without validating length. An attacker who can create containers or control container names, can supply a long name that overflows the buffer, leading to process crash or arbitrary...

CVE-2025-12969

Fluent Bit inforward input plugin does not properly enforce the security.users authentication mechanism under certain configuration conditions. This allows remote attackers with network access to the Fluent Bit instance exposing the forward input to send unauthenticated data. By bypassing...

CVE-2025-12972

Fluent Bit outfile plugin does not properly sanitize tag values when deriving output file names. When the File option is omitted, the plugin uses untrusted tag input to construct file paths. This allows attackers with network access to craft tags containing path traversal sequences that cause...

EUVD-2025-198810

Fluent Bit outfile plugin does not properly sanitize tag values when deriving output file names. When the File option is omitted, the plugin uses untrusted tag input to construct file paths. This allows attackers with network access to craft tags containing path traversal sequences that cause...

CVE-2025-12972

Fluent Bit outfile plugin does not properly sanitize tag values when deriving output file names. When the File option is omitted, the plugin uses untrusted tag input to construct file paths. This allows attackers with network access to craft tags containing path traversal sequences that cause...

AZL-71080 CVE-2025-12977 affecting package fluent-bit for versions less than 3.0.6-6

Fluent Bit inhttp, insplunk, and inelasticsearch input plugins fail to sanitize tagkey inputs. An attacker with network access or the ability to write records into Splunk or Elasticsearch can supply tagkey values containing special characters such as newlines or ../ that are treated as valid tags...

CVE-2025-12969

Fluent Bit inforward input plugin does not properly enforce the security.users authentication mechanism under certain configuration conditions. This allows remote attackers with network access to the Fluent Bit instance exposing the forward input to send unauthenticated data. By bypassing...

AZL-71077 CVE-2025-12969 affecting package fluent-bit for versions less than 3.0.6-6

Fluent Bit inforward input plugin does not properly enforce the security.users authentication mechanism under certain configuration conditions. This allows remote attackers with network access to the Fluent Bit instance exposing the forward input to send unauthenticated data. By bypassing...

AZL-71074 CVE-2025-12970 affecting package fluent-bit for versions less than 3.0.6-6

The extractname function in Fluent Bit indocker input plugin copies container names into a fixed size stack buffer without validating length. An attacker who can create containers or control container names, can supply a long name that overflows the buffer, leading to process crash or arbitrary...

AZL-71102 CVE-2025-12977 affecting package fluent-bit for versions less than 3.1.10-4

Fluent Bit inhttp, insplunk, and inelasticsearch input plugins fail to sanitize tagkey inputs. An attacker with network access or the ability to write records into Splunk or Elasticsearch can supply tagkey values containing special characters such as newlines or ../ that are treated as valid tags...

CVE-2025-12970

The extractname function in Fluent Bit indocker input plugin copies container names into a fixed size stack buffer without validating length. An attacker who can create containers or control container names, can supply a long name that overflows the buffer, leading to process crash or arbitrary...

CVE-2025-12978

Fluent Bit inhttp, insplunk, and inelasticsearch input plugins contain a flaw in the tagkey validation logic that fails to enforce exact key-length matching. This allows crafted inputs where a tag prefix is incorrectly treated as a full match. A remote attacker with authenticated or exposed acces...

AZL-71108 CVE-2025-12969 affecting package fluent-bit for versions less than 3.1.10-4

Fluent Bit inforward input plugin does not properly enforce the security.users authentication mechanism under certain configuration conditions. This allows remote attackers with network access to the Fluent Bit instance exposing the forward input to send unauthenticated data. By bypassing...

AZL-71111 CVE-2025-12970 affecting package fluent-bit for versions less than 3.1.10-2

The extractname function in Fluent Bit indocker input plugin copies container names into a fixed size stack buffer without validating length. An attacker who can create containers or control container names, can supply a long name that overflows the buffer, leading to process crash or arbitrary...

New Fluent Bit Flaws Expose Cloud to RCE and Stealthy Infrastructure Intrusions

Cybersecurity researchers have discovered five vulnerabilities in Fluent Bit, an open-source and lightweight telemetry agent, that could be chained to compromise and take over cloud infrastructures. The security defects "allow attackers to bypass authentication, perform path traversal, achieve...

CVE-2025-12978 CVE-2025-12978

Fluent Bit inhttp, insplunk, and inelasticsearch input plugins contain a flaw in the tagkey validation logic that fails to enforce exact key-length matching. This allows crafted inputs where a tag prefix is incorrectly treated as a full match. A remote attacker with authenticated or exposed acces...

CVE-2025-12978 CVE-2025-12978

Fluent Bit inhttp, insplunk, and inelasticsearch input plugins contain a flaw in the tagkey validation logic that fails to enforce exact key-length matching. This allows crafted inputs where a tag prefix is incorrectly treated as a full match. A remote attacker with authenticated or exposed acces...

CVE-2025-12969 CVE-2025-12969

Fluent Bit inforward input plugin does not properly enforce the security.users authentication mechanism under certain configuration conditions. This allows remote attackers with network access to the Fluent Bit instance exposing the forward input to send unauthenticated data. By bypassing...