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CVE-2024-7983

Denial of Service in open-webui/open-webui

7.5 HighFix available

In version 0.3.8 of open-webui, an endpoint for converting markdown to HTML is exposed without authentication. A maliciously crafted markdown payload can cause the server to spend excessive time converting it, leading to a denial of service. The server becomes unresponsive to other requests until the conversion is complete.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
None
Integrity
None
Availability
High

Exploit likelihood

0.88%Up 0.8 points since Mar 20, 2025
90%50%10%1%

What each source reports

CVE List Score used 7.5

Denial of Service in open-webui/open-webui

In version 0.3.8 of open-webui, an endpoint for converting markdown to HTML is exposed without authentication. A maliciously crafted markdown payload can cause the server to spend excessive time converting it, leading to a denial of service. The server becomes unresponsive to other requests until the conversion is complete.

Record
CVE-2024-7983
CVSS 3.0
7.5 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-770
Updated
2026-11-02
EUVDEUVD-2025-6928 7.5

In version 0.3.8 of open-webui, an endpoint for converting markdown to HTML is exposed without authentication. A maliciously crafted markdown payload can cause the server to spend excessive time converting it, leading to a denial of service. The server becomes unresponsive to other requests until the conversion is complete.

Record
EUVD-2025-6928
CVSS 3.0
7.5 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
GitHub AdvisoriesGHSA-5v9m-57mq-qc75 7.5

Open WebUI denial of service through endpoint for converting markdown

In version 0.3.8 of open-webui, an endpoint for converting markdown to HTML is exposed without authentication. A maliciously crafted markdown payload can cause the server to spend excessive time converting it, leading to a denial of service. The server becomes unresponsive to other requests until the conversion is complete.

Record
GHSA-5v9m-57mq-qc75
CVSS 3.0
7.5 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-400, CWE-770
Updated
2026-11-02
NVD 7.5

In version 0.3.8 of open-webui, an endpoint for converting markdown to HTML is exposed without authentication. A maliciously crafted markdown payload can cause the server to spend excessive time converting it, leading to a denial of service. The server becomes unresponsive to other requests until the conversion is complete.

Record
CVE-2024-7983
CVSS 3.0
7.5 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-770
Updated
2026-11-02
OSV 7.5

Denial of Service in open-webui/open-webui

In version 0.3.8 of open-webui, an endpoint for converting markdown to HTML is exposed without authentication. A maliciously crafted markdown payload can cause the server to spend excessive time converting it, leading to a denial of service. The server becomes unresponsive to other requests until the conversion is complete.

Record
CVE-2024-7983
CVSS 3.0
7.5 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-770
Updated
2026-11-02
OSVGHSA-5v9m-57mq-qc75 7.5

Open WebUI denial of service through endpoint for converting markdown

In version 0.3.8 of open-webui, an endpoint for converting markdown to HTML is exposed without authentication. A maliciously crafted markdown payload can cause the server to spend excessive time converting it, leading to a denial of service. The server becomes unresponsive to other requests until the conversion is complete.

Record
GHSA-5v9m-57mq-qc75
CVSS 3.0
7.5 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-400, CWE-770
Updated
2026-11-02
OSVPYSEC-2026-1723 7.5

Open WebUI denial of service through endpoint for converting markdown

In version 0.3.8 of open-webui, an endpoint for converting markdown to HTML is exposed without authentication. A maliciously crafted markdown payload can cause the server to spend excessive time converting it, leading to a denial of service. The server becomes unresponsive to other requests until the conversion is complete.

Record
PYSEC-2026-1723
CVSS 3.0
7.5 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVMGASA-2024-0321 No score

Updated chromium-browser-stable packages fix security vulnerabilities

Use after free in Downloads. (CVE-2024-6988) Use after free in Loader. (CVE-2024-6989) Use after free in Dawn. (CVE-2024-6991) Heap buffer overflow in Layout. (CVE-2024-6994) Inappropriate implementation in Fullscreen. (CVE-2024-6995) Race in Frames. (CVE-2024-6996) Use after free in Tabs. (CVE-2024-6997) Use after free in User Education. (CVE-2024-6998) Inappropriate implementation in FedCM. (CVE-2024-6999) Use after free in CSS. (CVE-2024-7000) Inappropriate implementation in HTML. (CVE-2024-7001) Inappropriate implementation in FedCM. (CVE-2024-7003) Insufficient validation of untrusted input in Safe Browsing. (CVE-2024-7004) Insufficient validation of untrusted input in Safe Browsing. (CVE-2024-7005) Uninitialized Use in Dawn. (CVE-2024-6990) Out of bounds read in WebTransport. (CVE-2024-7255) Insufficient data validation in Dawn. (CVE-2024-7256) Out of bounds memory access in ANGLE. (CVE-2024-7532) Use after free in Sharing. (CVE-2024-7533) Type Confusion in V8. (CVE-2024-7550) Heap buffer overflow in Layout. (CVE-2024-7534) Inappropriate implementation in V8. (CVE-2024-7535) Use after free in WebAudio. (CVE-2024-7536) Use after free in Passwords. (CVE-2024-7964) Inappropriate implementation in V8. (CVE-2024-7965) Out of bounds memory access in Skia. (CVE-2024-7966) Heap buffer overflow in Fonts. (CVE-2024-7967) Use after free in Autofill. (CVE-2024-7968) Type confusion in V8. (CVE-2024-7971) Inappropriate implementation in V8. (CVE-2024-7972) Heap buffer overflow in PDFium. (CVE-2024-7973) Insufficient data validation in V8 API. (CVE-2024-7974) Inappropriate implementation in Permissions. (CVE-2024-7975) Inappropriate implementation in FedCM. (CVE-2024-7976) Insufficient data validation in Installer. (CVE-2024-7977) Insufficient policy enforcement in Data Transfer. (CVE-2024-7978) Insufficient data validation in Installer. (CVE-2024-7979) Insufficient data validation in Installer. (CVE-2024-7980) Inappropriate implementation in Views. (CVE-2024-7981) Type Confusion in V8. (CVE-2024-7969) Heap buffer overflow in Skia. (CVE-2024-8193) Type Confusion in V8. (CVE-2024-8194) Heap buffer overflow in Skia. (CVE-2024-8198) Use after free in WebAudio. (CVE-2024-8362) Out of bounds write in V8. (CVE-2024-7970) Heap buffer overflow in Skia. (CVE-2024-8636) Use after free in Media Router. (CVE-2024-8637) Type Confusion in V8. (CVE-2024-8638) Use after free in Autofill. (CVE-2024-8639) Type Confusion in V8. (CVE-2024-8904) Inappropriate implementation in V8. (CVE-2024-8905) Incorrect security UI in Downloads. (CVE-2024-8906) Insufficient data validation in Omnibox. (CVE-2024-8907) Inappropriate implementation in Autofill. (CVE-2024-8908) Inappropriate implementation in UI. (CVE-2024-8909) Inappropriate implementation in V8. (CVE-2024-9121) Type Confusion in V8. (CVE-2024-9122) Integer overflow in Skia. (CVE-2024-9123)

Record
MGASA-2024-0321
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
open-webui
PyPI
 through 0.3.8 None known
open-webui
PyPI
 through 0.3.8, plus listed versions
0.1.1240.1.1250.2.00.2.10.2.2
Show 11 moreShow less
0.2.30.2.40.2.50.3.00.3.10.3.20.3.30.3.40.3.50.3.60.3.7
 None known
chromium-browser-stable
Mageia:9
From an advisory covering 62 CVEs
 before 128.0.6613.137-1.mga9.tainted
128.0.6613.137-1.mga9.tainted
open-webui
PyPI
 before 0.5.13, plus listed versions
0.1.1240.1.1250.2.00.2.10.2.2
Show 45 moreShow less
0.2.30.2.40.2.50.3.00.3.10.3.100.3.120.3.130.3.140.3.150.3.160.3.170.3.17.dev20.3.17.dev30.3.17.dev40.3.17.dev50.3.180.3.190.3.20.3.200.3.210.3.220.3.230.3.240.3.250.3.260.3.270.3.27.dev10.3.27.dev20.3.27.dev30.3.280.3.290.3.30.3.300.3.30.dev10.3.30.dev20.3.310.3.31.dev10.3.320.3.330.3.33.dev10.3.340.3.350.3.40.3.5
0.5.13

History

History
RecordedChangedSources
affected, facts
first indexedCVE List, EUVD, GitHub Advisories, NVD, OSV

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

In short

CVE-2024-7983 is a high vulnerability (CVSS 7.5) in Open-webui Open-webui/open-webui, published October 4, 2024. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.88%, the 59th percentile. Fixed in open-webui 0.5.13.

References

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