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Payload class · ssrf

Server-Side Request Forgery

Point the server inward. Cloud metadata endpoints leak credentials; the bypass block (decimal/hex IP, IPv6, enclosed-alphanumerics, DNS rebinding hosts) defeats common allow-list filters.

ssrfcloudmetadatabypass
Stable IDpayload:ssrfLast updatedLast verifiedLegacy review pendingProvenanceSource-linked
Context first

Use as a detection primitive

Point the server inward. Cloud metadata endpoints leak credentials; the bypass block (decimal/hex IP, IPv6, enclosed-alphanumerics, DNS rebinding hosts) defeats common allow-list filters.

Do not copy blind

Identify the parser, sink, encoding, and expected non-vulnerable behavior before choosing a sample. Prefer non-destructive markers.

Samples

Recorded payloads

Detection sampleAuthorization required

Confirm the sink and encoding context before use.

http://127.0.0.1/
Positive signal
Tool-specific output that supports the stated hypothesis.
Negative control
No result, or identical behavior against a known-safe control.
Intrusiveness
Review flags and target scope before execution.
Detection sampleAuthorization required

Confirm the sink and encoding context before use.

http://localhost:80/
Positive signal
Tool-specific output that supports the stated hypothesis.
Negative control
No result, or identical behavior against a known-safe control.
Intrusiveness
Review flags and target scope before execution.
Detection sampleAuthorization required

Confirm the sink and encoding context before use.

http://169.254.169.254/latest/meta-data/iam/security-credentials/
Positive signal
Tool-specific output that supports the stated hypothesis.
Negative control
No result, or identical behavior against a known-safe control.
Intrusiveness
Review flags and target scope before execution.
Detection sampleAuthorization required

Confirm the sink and encoding context before use.

http://169.254.169.254/latest/meta-data/ (AWS)  ·  http://metadata.google.internal/computeMetadata/v1/ (GCP, needs Metadata-Flavor: Google)
Positive signal
Tool-specific output that supports the stated hypothesis.
Negative control
No result, or identical behavior against a known-safe control.
Intrusiveness
Review flags and target scope before execution.
Detection sampleAuthorization required

Confirm the sink and encoding context before use.

http://169.254.169.254/metadata/instance?api-version=2021-02-01 (Azure, needs Metadata: true)
Positive signal
Tool-specific output that supports the stated hypothesis.
Negative control
No result, or identical behavior against a known-safe control.
Intrusiveness
Review flags and target scope before execution.
Detection sampleAuthorization required

Confirm the sink and encoding context before use.

http://[::1]/
Positive signal
Tool-specific output that supports the stated hypothesis.
Negative control
No result, or identical behavior against a known-safe control.
Intrusiveness
Review flags and target scope before execution.
Detection sampleAuthorization required

Confirm the sink and encoding context before use.

http://2130706433/
Positive signal
Tool-specific output that supports the stated hypothesis.
Negative control
No result, or identical behavior against a known-safe control.
Intrusiveness
Review flags and target scope before execution.
Detection sampleAuthorization required

Confirm the sink and encoding context before use.

http://0x7f000001/
Positive signal
Tool-specific output that supports the stated hypothesis.
Negative control
No result, or identical behavior against a known-safe control.
Intrusiveness
Review flags and target scope before execution.
Detection sampleAuthorization required

Confirm the sink and encoding context before use.

http://127.0.0.1.nip.io/
Positive signal
Tool-specific output that supports the stated hypothesis.
Negative control
No result, or identical behavior against a known-safe control.
Intrusiveness
Review flags and target scope before execution.
Detection sampleAuthorization required

Confirm the sink and encoding context before use.

http://localhost#@evil.com/
Positive signal
Tool-specific output that supports the stated hypothesis.
Negative control
No result, or identical behavior against a known-safe control.
Intrusiveness
Review flags and target scope before execution.
Detection sampleAuthorization required

Confirm the sink and encoding context before use.

http://[email protected]/
Positive signal
Tool-specific output that supports the stated hypothesis.
Negative control
No result, or identical behavior against a known-safe control.
Intrusiveness
Review flags and target scope before execution.
Source

Attribution

Open the primary collection ↗

Version history: normalized permanent page created 2026-08-20.