CVE-2026-43507
📛 CVE Title
CVE-2026-43507
Description
An issue was discovered in Prosody before 0.12.6 and 1.0.0 through 13.0.0 before 13.0.5. A Denial of Service can occur via memory exhaustion caused by XML parsing resource amplification from unauthenticated connections.
Overview
- State
- PUBLISHED
- Assigner (CNA)
- mitre
- CVSS severity
- MEDIUM
- CVSS score
- 5.3 / 10
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L- Effective score
- 5.3 / 10 MEDIUM source: CNA overview
- CWE(s)
-
CWE-770 - Reserved
- 2026-05-01
- Published
- 2026-05-01 16:47 UTC
- Last updated
- 2026-05-01 17:20 UTC
- Source
- https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/43xxx/CVE-2026-43507.json
- Linked Threat
- CVE-2026-43507 — CVE-2026-43507
NVD triage scoring NVD CVE 2.0
Layer NVD adds on top of the CNA's CVE record — published / last-modified timestamps, exploitability / impact subscores, and the FIRST.org EPSS probability that this CVE will be exploited in the wild in the next 30 days.
- NVD published
- 2026-05-01 15:16:52 UTC
- NVD last modified
- 2026-05-01 17:09:17 UTC
- NVD CVSS v3.1
- 5.3 / 10 MEDIUM source: cve@mitre.org
- NVD CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L- Exploitability subscore
- 3.9 / 10
- Impact subscore
- 1.4 / 10
- EPSS score
- 0.0007 (probability of exploitation in next 30 days)
- EPSS percentile
- 21.63% vs all CVEs — higher = more likely to be exploited, as of 2026-05-24
NVD / KEV / EPSS data refreshed 2026-05-25 08:50 UTC. Re-run the 🛰 Backfill from NVD button above to refresh.
European Union Vulnerability Database ENISA EUVD
ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.
- EUVD ID
-
EUVD-2026-26660 - Assigner
- mitre
- Published
- May 1, 2026, 2:47:22 PM
- Updated
- May 1, 2026, 3:20:38 PM
- EUVD base score (CVSS 3.1)
-
5.3 / 10
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L - EUVD-reported EPSS
- 0.0700
- Vendors
- Prosody
- Products
-
prosody (0 <0.12.6)prosody (1.0.0 <13.0.5)prosody (1.0.0 <13.0.5)prosody (0 <0.12.6)
ENISA description: An issue was discovered in Prosody before 0.12.6 and 1.0.0 through 13.0.0 before 13.0.5. A Denial of Service can occur via memory exhaustion caused by XML parsing resource amplification from unauthenticated connections.
Affected products (1)
| Vendor | Product | Versions | Platforms |
|---|---|---|---|
| Prosody | Prosody |
0 (affected),
1.0.0 (affected)
|
— |
Affected products — CPE 2.3 (1) NVD
NVD's normalized CPE 2.3 matchers, used by vendor tools (vulnerability scanners, asset managers) for automated detection. Compare with the CNA's free-text "Affected products" section above.
cpe:2.3:a:prosody:prosody:*:*:*:*:*:*:*:*
Vendor references (3)
References embedded in the original CVE record by the assigning CNA.
Web references (10)
DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.
- https://security.alpinelinux.org/vuln/CVE-2026-43507 rapid7:security.alpinelinux.org
- https://attackerkb.com/topics/CVE-2026-43507 rapid7:attackerkb.com
- https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-26660 rapid7:euvd.enisa.europa.eu
- http://cwe.mitre.org/data/definitions/770.html rapid7:cwe.mitre.org
- https://www.cve.org/CVERecord?id=CVE-2026-43507 tenable:www.cve.org
- https://www.first.org/epss/ tenable:www.first.org
- https://www.openwall.com/lists/oss-security/2026/05/01/5 tenable:www.openwall.com
- https://blog.unionium.org/ARTICLES/1.HTM tenable:blog.unionium.org
- https://nvd.nist.gov/vuln/detail/CVE-2026-43507 tenable:nvd.nist.gov
- https://prosody.im/security/advisory_735dd9d3/ tenable:prosody.im
NVD-tagged references (3)
Reference list NVD curates from the CNA record, vendor advisories, and third-party reports. The tag chips below are NVD's analyst-assigned categories.
- https://blog.unionium.org/ARTICLES/1.HTM cve@mitre.org Third Party Advisory
- https://prosody.im/security/advisory_735dd9d3/ cve@mitre.org MitigationPatchVendor Advisory
- https://www.openwall.com/lists/oss-security/2026/05/01/5 cve@mitre.org Mailing ListPatchThird Party Advisory
Remediations (18)
Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.
-
web:blog.qualys.com
Microsoft has rolled out its March 2026 Patch Tuesday updates, delivering a fresh batch of security fixes designed to keep Windows environments protected from emerging threats.
2026-05-23 20:24 UTC -
web:cyberpress.org
The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has added two actively exploited Microsoft Defender vulnerabilities to its Known Exploited Vulnerabilities (KEV) catalog, issuing an urgent remediation directive for federal agencies with a due date of June 3, 2026 .
2026-05-23 20:24 UTC -
web:cybersecuritynews.com
Microsoft released its March 2026 Patch Tuesday security update on March 10, 2026 , addressing 78 vulnerabilities across Windows, Microsoft Office, Azure, SQL Server, and .NET. The update includes one actively exploited zero-day vulnerability and multiple Critical-rated flaws demanding immediate attention from security teams. The most urgent fix this month is CVE - 2026 -21262, the sole zero-day ...
2026-05-23 20:24 UTC -
web:krebsonsecurity.com
Microsoft expects that exploitation is more likely. May's Patch Tuesday is a welcome respite from April, which saw Microsoft fix a near-record 167 security flaws.
2026-05-23 20:24 UTC -
web:portal.msrc.microsoft.com
The Security Update Guide provides information on the latest Microsoft security updates, helping users understand and address potential vulnerabilities effectively.
2026-05-23 20:24 UTC -
web:techcrunch.com
Critical security flaws targeting Windows and Office users allow hackers to take complete control of a victim's computer by clicking a malicious link or opening a file. Patch now.
2026-05-23 20:24 UTC -
web:www.computerworld.com
Each month, the team at Readiness analyzes the latest Patch Tuesday updates from Microsoft and provides detailed, actionable testing guidance. The company's Patch Tuesday release for February ...
2026-05-23 20:24 UTC -
web:www.crowdstrike.com
Microsoft's March 2026 Patch Tuesday addresses 82 CVEs , featuring eight Critical vulnerabilities.
2026-05-23 20:24 UTC -
web:www.oracle.com
This Critical Patch Update contains 481 new security patches across the product families listed below. Please note that an MOS note summarizing the content of this Critical Patch Update and other Oracle Software Security Assurance activities is located at April 2026 Critical Patch Update: Executive Summary and Analysis.
2026-05-23 20:24 UTC -
web:zecurit.com
Get the complete breakdown of Microsoft's May 2026 Patch Tuesday. We analyze the latest security updates and all critical CVEs .
2026-05-23 20:24 UTC -
web:blog.qualys.com
May 2026's Patch Tuesday arrives with Microsoft addressing a fresh set of vulnerabilities across its ecosystem, reinforcing the ongoing need for timely patching in an increasingly threat-heavy…
2026-06-03 07:48 UTC -
web:cyberinsider.com
Google has released the June 2026 Android security updates, addressing a zero-day flaw that is under active, targeted exploitation.
2026-06-03 07:48 UTC -
web:cybersecuritynews.com
Microsoft's May 2026 Patch Tuesday lands with a heavy enterprise focus, fixing 120 vulnerabilities across Windows, Office, Azure, developer tools, and Microsoft 365 apps, including 29 remote code execution (RCE) flaws rated Critical.
2026-06-03 07:48 UTC -
web:msrc.microsoft.com
The Microsoft Security Response Center (MSRC) investigates all reports of security vulnerabilities affecting Microsoft products and services, and provides the information here as part of the ongoing effort to help you manage security risks and help keep your systems protected.
2026-06-03 07:48 UTC -
web:nvd.nist.gov
The NVD is the U.S. government repository of standards based vulnerability management data represented using the Security Content Automation Protocol (SCAP). This data enables automation of vulnerability management, security measurement, and compliance. The NVD includes databases of security checklist references, security-related software flaws, product names, and impact metrics. For ...
2026-06-03 07:48 UTC -
web:www.helpnetsecurity.com
Microsoft has marked May 2026 Patch Tuesday by releasing fixes for 120+ CVE -numbered vulnerabilities, none of which are actively exploited.
2026-06-03 07:48 UTC -
web:www.malwarebytes.com
The KEV catalog tracks vulnerabilities known to be exploited in the wild and sets patch deadlines for Federal Civilian Executive Branch (FCEB) agencies. Five of the added vulnerabilities are quite old by vulnerability standards. Patches were released in 2008, 2009, and 2010. But the Microsoft Defender vulnerabilities are from this year. Those ...
2026-06-03 07:48 UTC -
web:www.rapid7.com
Microsoft is publishing 137 vulnerabilities on May 2026 Patch Tuesday, including critical RCE in Netlogon and the Windows DNS client.
2026-06-03 07:48 UTC
AI Forensic Analysis
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Raw JSON
The full cvelistV5 record. Download as CVE-2026-43507.json.
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