CVE-2026-105117

OpenAM before 16.1.3 Email Content Injection via Users REST Self-Service Actions

Published Oct 3, 2026 CVSS 4.0 · 5.3 Medium EPSS < 1% KEV · Not listed

Description

OpenAM before 16.1.3 contains an email content injection vulnerability that allows unauthenticated attackers to control notification email wording via the forgotPassword and register actions on /json/{realm}/users. Attackers can supply subject and message fields to send phishing mail from the organisation's configured From address, or abuse register as a relay to arbitrary recipients.

Analysis

Technical impact

The vulnerability is an email content injection flaw in OpenAM, classified as CWE‑20, that allows an unauthenticated attacker to supply arbitrary subject and message fields on the forgotPassword and register endpoints exposed at /json/{realm}/users. By controlling these fields, the attacker can send phishing emails or use the service as an email relay, sending mail from the server’s configured From address to arbitrary recipients. This can lead to credential theft, spoofing, and other social‑engineering attacks, compromising the confidentiality and integrity of the organization’s communications.

Affected Systems

The affected product is OpenIdentityPlatform OpenAM. All releases prior to version 16.1.3 are vulnerable, including 16.1.2 and earlier revisions.

Risk and Exploitability

The CVSS score of 5.3 indicates moderate severity, and the probability of exploitation is not quantified (EPSS not available). The vulnerability is not listed in CISA’s KEV catalog. Attackers can exploit the flaw without authentication by sending specially crafted JSON to the mentioned REST endpoints, which are reachable from the network where the OpenAM server is exposed.

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

OpenIdentityPlatform

OpenAM

unaffected

Version	Status	Constraints
`0`	affected	< 16.1.3
`16.1.3`	unaffected	—

OpenIdentityPlatform

OpenAM

unaffected

Version	Status	Constraints
`0`	affected	< 16.1.3
`16.1.3`	unaffected	—

No data.

Vendor Product Versions

Openidentityplatform

Openam

Version	Status	Scheme	Platform
`[0,16.1.3)`	affected	generic	—
`16.1.3`	unaffected	semver	—

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

Update to OpenAM 16.1.3 or later, which includes the fix for email content injection.
Restrict access to the /json/{realm}/users endpoint, limiting it to trusted networks or enforcing authentication before permitting the forgotPassword or register actions.
Sanitize and validate any user‑supplied subject or message parameters, ensuring they cannot inject arbitrary email content or alter the From address.
Consider disabling the forgotPassword and register REST endpoints if they are not required for your deployment.

Generated by OpenCVE AI on October 3, 2026 at 15:22 UTC.

Tracking

Advisories

No advisories available

Metrics

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction Passive

Vulnerable System Confidentiality Impact Low

Vulnerable System Integrity Impact Low

Vulnerable System Availability Impact None

Subsequent System Confidentiality Impact Low

Subsequent System Integrity Impact Low

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Changed

Confidentiality Impact Low

Integrity Impact Low

Availability Impact None

User Interaction Required

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploit prediction score: < 1% (0.162% probability within 30 days)

Exploitation none

Automatable no

Technical Impact partial

References

Link	Providers
https://github.com/OpenIdentityPlatform/OpenAM/security/advisories/GHSA-mw38-8gr7-c4x2
https://www.vulncheck.com/advisories/openam-before-16.1.3-email-content-injection-via-users-rest-self-service-actions

History

Oct 5, 2026 4:30 PM Scoring metrics updated View changes

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Oct 3, 2026 2:00 PM Description updated. Title updated. First appearance in the feed. Weaknesses updated. Affected versions updated. Affected vendors updated. Added references. Scoring metrics updated View changes

Type	Values Removed	Values Added
Description		OpenAM before 16.1.3 contains an email content injection vulnerability that allows unauthenticated attackers to control notification email wording via the forgotPassword and register actions on /json/{realm}/users. Attackers can supply subject and message fields to send phishing mail from the organisation's configured From address, or abuse register as a relay to arbitrary recipients.
Title		OpenAM before 16.1.3 Email Content Injection via Users REST Self-Service Actions
First Time appeared		Openidentityplatform Openidentityplatform openam
Weaknesses		CWE-20
CPEs		cpe:2.3:a:openidentityplatform:openam::::::::
Vendors & Products		Openidentityplatform Openidentityplatform openam
References		https://github.com/OpenIdentityPlatform/OpenAM/security/advisories/GHSA-mw38-8gr7-c4x2 https://www.vulncheck.com/advisories/openam-before-16.1.3-email-content-injection-via-users-rest-self-service-actions
Metrics		cvssV3_1 `{'score': 6.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N'}` cvssV4_0 `{'score': 5.3, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N'}`