CVE-2026-123029VulnerabilityPublished 5 Nov 2026

WowzaStreamingEngine · Wowza Streaming Engine before 4.12.2 processes XML external entities, which allows remote attackers to read local

Affects WowzaStreamingEngineSource GCVE Database

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Authoritative record:CVE-2026-123029· High 7.5

Not known to be exploited · CVSS 7.5 High : upgrade to 4.12.2 soon.

Data as of 5 Nov 2026, 10:30 UTC

CVSS 3.1 base score

7.5High

How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none

CVSS scores by source
CNA (mitre)	CVSS 3.1	7.5

Patch: Available – fixed in 4.12.2

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Attack Vector: Network
Attack Complexity: Low
Privileges Required: None
User Interaction: None
Scope: Unchanged
Confidentiality: High
Integrity: None
Availability: None

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Network: The vulnerable component is bound to the network stack and the set of possible attackers extends beyond the other options listed, up to and including the entire Internet. Such a vulnerability is often termed 'remotely exploitable' and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).
Attack Complexity: Low: Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success against the vulnerable component.
Privileges Required: None: The attacker is unauthorized prior to attack, and therefore does not require any access to settings or files to carry out an attack.
User Interaction: None: The vulnerable system can be exploited without any interaction from any user.
Scope: Unchanged: An exploited vulnerability can only affect resources managed by the same security authority. In this case, the vulnerable component and the impacted component are either the same, or both are managed by the same security authority.
Confidentiality: High: There is total loss of confidentiality, resulting in all resources within the impacted component being divulged to the attacker. Alternatively, access to only some restricted information is obtained, but the disclosed information presents a direct, serious impact.
Integrity: None: There is no loss of integrity within the impacted component.
Availability: None: There is no impact to availability within the impacted component.

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 5 Nov 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 5 Nov 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

ghsa-g54c-2vxv-4cp8

What to do

Upgrade com.wowza/WowzaStreamingEngine to 4.12.2.

Affected software

Product	Affected	Fixed in
Mavencom.wowza/WowzaStreamingEngine`pkg:maven/com.wowza/WowzaStreamingEngine`Other threats	Affected <4.12.2	Fixed in 4.12.2

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

A fix is available in Wowza Streaming Engine version 4.12.2. Users should upgrade to version 4.12.2 or later to remediate this vulnerability. Since the vendor advisory or patch links are not provided, confirm patch availability from official Wowza sources before applying updates.

Description

Wowza Streaming Engine versions before 4.12.2 are vulnerable to XML External Entity (XXE) processing. This vulnerability allows remote attackers to read local files on the server with the privileges of the Wowza Streaming Engine process. The flaw arises from improper handling of XML input, enabling unauthorized disclosure of sensitive information.

Impact

Remote attackers can read local files on the Wowza Streaming Engine server with the privileges of the Wowza process. This can lead to unauthorized disclosure of sensitive information. There is no indication of integrity or availability impact. No known exploits are reported in the wild at this time.

Summary

The vulnerability identified as CVE-2026-123029 affects Wowza Streaming Engine prior to version 4.12.2. It involves the processing of XML external entities, which can be exploited by remote attackers to read local files on the server. This occurs because the application does not properly restrict XML external entity resolution, leading to potential exposure of sensitive data accessible to the Wowza process. The CVSS v3.1 base score is 7.5, indicating a high severity with network attack vector, low attack complexity, no privileges required, and no user interaction needed. The impact is confidentiality loss without affecting integrity or availability.

CWE-611Improper Restriction of XML External Entity Reference (opens in a new tab)
Base weaknessOWASP Top 10 A02:2025: Security Misconfiguration (opens in a new tab)
The product processes an XML document that can contain XML entities with URIs that resolve to documents outside of the intended sphere of control, causing the product to embed incorrect documents into its output.
Implementation · System Configuration
Many XML parsers and validators can be configured to disable external entity expansion.
OWASP Cheat Sheets
Deserialization (opens in a new tab)
XML Security (opens in a new tab)
XML External Entity Prevention (opens in a new tab)
OWASP ASVS 4.0.3
V5.5.2 (opens in a new tab)
Attack patterns
Data Serialization External Entities Blowup (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

References

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 5 Nov 2026, 10:30 UTC

WeaknessesCWE-611

Technical details

References

Community reviews

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