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CVE-2024-32874

In Frigate, Malicious Long Unicode filenames may cause a Multiple Application-level Denial of Service

6.8 MediumFix available

Frigate is a network video recorder (NVR) with realtime local object detection for IP cameras. Below 0.13.2 Release, when uploading a file or retrieving the filename, a user may intentionally use a large Unicode filename which would lead to a application-level denial of service. This is due to no limitation set on the length of the filename and the costy use of the Unicode normalization with the form NFKD under the hood of secure_filename().

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
High
User interaction
None

What an attacker can affect

Confidentiality
None
Integrity
None
Availability
High

Exploit likelihood

0.77%Up 0.7 points since May 10, 2024
90%50%10%1%

What each source reports

CVE List Score used 6.8

In Frigate, Malicious Long Unicode filenames may cause a Multiple Application-level Denial of Service

Frigate is a network video recorder (NVR) with realtime local object detection for IP cameras. Below 0.13.2 Release, when uploading a file or retrieving the filename, a user may intentionally use a large Unicode filename which would lead to a application-level denial of service. This is due to no limitation set on the length of the filename and the costy use of the Unicode normalization with the form NFKD under the hood of secure_filename().

Record
CVE-2024-32874
CVSS 3.1
6.8 MediumCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H
Weakness
CWE-770
Updated
2026-11-02
EUVDEUVD-2024-1822 6.8

Frigate is a network video recorder (NVR) with realtime local object detection for IP cameras. Below 0.13.2 Release, when uploading a file or retrieving the filename, a user may intentionally use a large Unicode filename which would lead to a application-level denial of service. This is due to no limitation set on the length of the filename and the costy use of the Unicode normalization with the form NFKD under the hood of secure_filename().

Record
EUVD-2024-1822
CVSS 3.1
6.8 MediumCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H
Updated
2026-11-03
GitHub AdvisoriesGHSA-w4h6-9wrp-v5jq 9.3

Malicious Long Unicode filenames may cause a Multiple Application-level Denial of Service

Important: Exploiting this vulnerability requires the attacker to have access to your Frigate instance, which means they could also just delete all of your recordings or perform any other action. If you have configured authentication in front of Frigate via a reverse proxy, then this vulnerability is not exploitable without first getting around your authentication method. For many obvious reasons in addition to this one, please don't expose your Frigate instance publicly without any kind of authentication.

Summary

When uploading a file or retrieving the filename, a user may intentionally use a large Unicode filename which would lead to a application-level denial of service. This is due to no limitation set on the length of the filename and the costy use of the Unicode normalization with the form NFKD under the hood of secure_filename().

I idenfied multiple vulnerable paths on blakeblackshear/frigate repository. In all of those paths, it was possible for a malicious user to send a filename equals to the output of : python3 -c "print('℀' * 1_000_000)" which would reach the werkzeug secure_filename() call , which in turn under the hood uses a compatibility Unicode normalization with NFKC/NFKD form. In sum, the latter call would be costly in matter of CPU resource and may lead to the application-level denial of service.

Vulnerable Paths

<details> <summary>Path with 2 steps</summary>

  1. frigate/api/media.py

    <pre><code class="python">@MediaBp.route("/&lt;camera_name&gt;/start/&lt;int:start_ts&gt;/end/&lt;int:end_ts&gt;/clip.mp4") @MediaBp.route("/&lt;camera_name&gt;/start/&lt;float:start_ts&gt;/end/&lt;float:end_ts&gt;/clip.mp4") def recording_clip(<strong>camera_name</strong>, start_ts, end_ts): download = request.args.get("download", type=bool) </code></pre>

  2. frigate/api/media.py

    <pre><code class="python"> playlist_lines.append(f"outpoint {int(end_ts - clip.start_time)}") file_name = secure_filename(<strong>f"clip_{camera_name}_{start_ts}-{end_ts}.mp4"</strong>) path = os.path.join(CACHE_DIR, file_name) </code></pre>

</details>

frigate/api/media.py

<pre><code class="python"> playlist_lines.append(f"outpoint {int(end_ts - clip.start_time)}") file_name = secure_filename(<strong>f"clip_{camera_name}_{start_ts}-{end_ts}.mp4"</strong>) path = os.path.join(CACHE_DIR, file_name) </code></pre>

This user-provided value can reach a costly Unicode normalization operation.

Paths

<details> <summary>Path with 2 steps</summary>

  1. frigate/api/media.py

    <pre><code class="python">@MediaBp.route("/&lt;camera_name&gt;/start/&lt;int:start_ts&gt;/end/&lt;int:end_ts&gt;/clip.mp4") @MediaBp.route("/&lt;camera_name&gt;/start/&lt;float:start_ts&gt;/end/&lt;float:end_ts&gt;/clip.mp4") def recording_clip(camera_name, <strong>start_ts</strong>, end_ts): download = request.args.get("download", type=bool) </code></pre>

  2. frigate/api/media.py …

Record
GHSA-w4h6-9wrp-v5jq
CVSS 3.1
9.3 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:H
Weakness
CWE-770
Updated
2026-11-02
NVD 6.8

Frigate is a network video recorder (NVR) with realtime local object detection for IP cameras. Below 0.13.2 Release, when uploading a file or retrieving the filename, a user may intentionally use a large Unicode filename which would lead to a application-level denial of service. This is due to no limitation set on the length of the filename and the costy use of the Unicode normalization with the form NFKD under the hood of secure_filename().

Record
CVE-2024-32874
CVSS 3.1
6.8 MediumCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H
Weakness
CWE-770
Updated
2026-11-02
OSV 6.8

In Frigate, Malicious Long Unicode filenames may cause a Multiple Application-level Denial of Service

Frigate is a network video recorder (NVR) with realtime local object detection for IP cameras. Below 0.13.2 Release, when uploading a file or retrieving the filename, a user may intentionally use a large Unicode filename which would lead to a application-level denial of service. This is due to no limitation set on the length of the filename and the costy use of the Unicode normalization with the form NFKD under the hood of secure_filename().

Record
CVE-2024-32874
CVSS 3.1
6.8 MediumCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H
Weakness
CWE-770
Updated
2026-11-02
OSVGHSA-w4h6-9wrp-v5jq 9.3

Malicious Long Unicode filenames may cause a Multiple Application-level Denial of Service

Important: Exploiting this vulnerability requires the attacker to have access to your Frigate instance, which means they could also just delete all of your recordings or perform any other action. If you have configured authentication in front of Frigate via a reverse proxy, then this vulnerability is not exploitable without first getting around your authentication method. For many obvious reasons in addition to this one, please don't expose your Frigate instance publicly without any kind of authentication.

Summary

When uploading a file or retrieving the filename, a user may intentionally use a large Unicode filename which would lead to a application-level denial of service. This is due to no limitation set on the length of the filename and the costy use of the Unicode normalization with the form NFKD under the hood of secure_filename().

I idenfied multiple vulnerable paths on blakeblackshear/frigate repository. In all of those paths, it was possible for a malicious user to send a filename equals to the output of : python3 -c "print('℀' * 1_000_000)" which would reach the werkzeug secure_filename() call , which in turn under the hood uses a compatibility Unicode normalization with NFKC/NFKD form. In sum, the latter call would be costly in matter of CPU resource and may lead to the application-level denial of service.

Vulnerable Paths

<details> <summary>Path with 2 steps</summary>

  1. frigate/api/media.py

    <pre><code class="python">@MediaBp.route("/&lt;camera_name&gt;/start/&lt;int:start_ts&gt;/end/&lt;int:end_ts&gt;/clip.mp4") @MediaBp.route("/&lt;camera_name&gt;/start/&lt;float:start_ts&gt;/end/&lt;float:end_ts&gt;/clip.mp4") def recording_clip(<strong>camera_name</strong>, start_ts, end_ts): download = request.args.get("download", type=bool) </code></pre>

  2. frigate/api/media.py

    <pre><code class="python"> playlist_lines.append(f"outpoint {int(end_ts - clip.start_time)}") file_name = secure_filename(<strong>f"clip_{camera_name}_{start_ts}-{end_ts}.mp4"</strong>) path = os.path.join(CACHE_DIR, file_name) </code></pre>

</details>

frigate/api/media.py

<pre><code class="python"> playlist_lines.append(f"outpoint {int(end_ts - clip.start_time)}") file_name = secure_filename(<strong>f"clip_{camera_name}_{start_ts}-{end_ts}.mp4"</strong>) path = os.path.join(CACHE_DIR, file_name) </code></pre>

This user-provided value can reach a costly Unicode normalization operation.

Paths

<details> <summary>Path with 2 steps</summary>

  1. frigate/api/media.py

    <pre><code class="python">@MediaBp.route("/&lt;camera_name&gt;/start/&lt;int:start_ts&gt;/end/&lt;int:end_ts&gt;/clip.mp4") @MediaBp.route("/&lt;camera_name&gt;/start/&lt;float:start_ts&gt;/end/&lt;float:end_ts&gt;/clip.mp4") def recording_clip(camera_name, <strong>start_ts</strong>, end_ts): download = request.args.get("download", type=bool) </code></pre>

  2. frigate/api/media.py …

Record
GHSA-w4h6-9wrp-v5jq
CVSS 3.1
9.3 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:H
Weakness
CWE-770
Updated
2026-11-02
OSVPYSEC-2026-342 9.3

Malicious Long Unicode filenames may cause a Multiple Application-level Denial of Service

Important: Exploiting this vulnerability requires the attacker to have access to your Frigate instance, which means they could also just delete all of your recordings or perform any other action. If you have configured authentication in front of Frigate via a reverse proxy, then this vulnerability is not exploitable without first getting around your authentication method. For many obvious reasons in addition to this one, please don't expose your Frigate instance publicly without any kind of authentication.

Summary

When uploading a file or retrieving the filename, a user may intentionally use a large Unicode filename which would lead to a application-level denial of service. This is due to no limitation set on the length of the filename and the costy use of the Unicode normalization with the form NFKD under the hood of secure_filename().

I idenfied multiple vulnerable paths on blakeblackshear/frigate repository. In all of those paths, it was possible for a malicious user to send a filename equals to the output of : python3 -c "print('℀' * 1_000_000)" which would reach the werkzeug secure_filename() call , which in turn under the hood uses a compatibility Unicode normalization with NFKC/NFKD form. In sum, the latter call would be costly in matter of CPU resource and may lead to the application-level denial of service.

Vulnerable Paths

<details> <summary>Path with 2 steps</summary>

  1. frigate/api/media.py

    <pre><code class="python">@MediaBp.route("/&lt;camera_name&gt;/start/&lt;int:start_ts&gt;/end/&lt;int:end_ts&gt;/clip.mp4") @MediaBp.route("/&lt;camera_name&gt;/start/&lt;float:start_ts&gt;/end/&lt;float:end_ts&gt;/clip.mp4") def recording_clip(<strong>camera_name</strong>, start_ts, end_ts): download = request.args.get("download", type=bool) </code></pre>

  2. frigate/api/media.py

<pre><code class="python"> playlist_lines.append(f"outpoint {int(end_ts - clip.start_time)}") file_name = secure_filename(<strong>f"clip_{camera_name}_{start_ts}-{end_ts}.mp4"</strong>) path = os.path.join(CACHE_DIR, file_name) </code></pre>

</details>

frigate/api/media.py

<pre><code class="python"> playlist_lines.append(f"outpoint {int(end_ts - clip.start_time)}") file_name = secure_filename(<strong>f"clip_{camera_name}_{start_ts}-{end_ts}.mp4"</strong>) path = os.path.join(CACHE_DIR, file_name) </code></pre>

This user-provided value can reach a costly Unicode normalization operation.

Paths

<details> <summary>Path with 2 steps</summary>

  1. frigate/api/media.py

    <pre><code class="python">@MediaBp.route("/&lt;camera_name&gt;/start/&lt;int:start_ts&gt;/end/&lt;int:end_ts&gt;/clip.mp4") @MediaBp.route("/&lt;camera_name&gt;/start/&lt;float:start_ts&gt;/end/&lt;float:end_ts&gt;/clip.mp4") def recording_clip(camera_name, <strong>start_ts</strong>, end_ts): download = request.args.get("download", type=bool) </code></pre>

  2. frigate/api/media.py …

Record
PYSEC-2026-342
CVSS 3.1
9.3 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:H
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
frigate
PyPI
 before 0.13.2
0.13.2
frigate
PyPI
 before 0.13.2, plus listed versions
0.1.00.2.00.3.00.4.00.4.0a0
Show 24 moreShow less
0.4.0a0.post0.dev140.5.00.5.0a00.5.0a0.post0.dev20.5.0a0.post0.dev30.5.0a0.post0.dev40.5.0a0.post0.dev70.5.0a0.post0.dev80.6.00.6.0a00.6.0a0.post0.dev20.6.0a0.post0.dev30.6.0a0.post0.dev40.6.10.7.00.7.0a00.7.0a0.post0.dev10.7.0a0.post0.dev320.7.0a0.post0.dev340.7.0a0.post0.dev370.7.0a0.post0.dev380.8.0a0.post0.dev390.8.0a0.post0.dev400.8.0a0.post0.dev41
0.13.2

History

History
RecordedChangedSources
aliases, publishedEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2024-32874 is a medium vulnerability (CVSS 6.8) in Blakeblackshear Frigate, published May 9, 2024. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.77%, the 55th percentile. Fixed in frigate 0.13.2.

References

This page doesn't list everything

Left out here: the rest of 3 source descriptions. The JSON record has them.

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