CVE-2026-123540

OpenAM before 16.1.4 Incomplete Attribute Encoding in SAML 1.x Form POST

Products / packages OpenIdentityPlatform OpenAM

Published 08/11/2026, 01:37:46 UTC

Severity and exploitation

Not in CISA KEV

KEV coverage does not rule out exploitation.

KEV checked 15/11/2026, 04:55:31 UTC

VulnCheck · CVSS:4.0 · 2

Assessment vector

CVSS:4.0/AV:N/AC:H/AT:P/PR:H/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N

VulnCheck · CVSS:3.1 · 2

Assessment vector

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

The headline uses the highest imported catalog score. Assessments can differ by source and CVSS version.

Severity

low2.0

CVSS measures technical severity, not the likelihood of an attack.

Known exploitation

Not listed in the checked CISA KEV catalog

Absence from CISA KEV does not rule out attacks.

Public exploit

Not established by this record

Missing evidence does not mean no public exploit exists.

Remediation

Fix status not established

No structured fix or guidance is available here. Check the latest publisher advisory.

What this means

OpenAM before 16.1.4 has an incomplete output encoding vulnerability, allowing a trusted SAML 1.x identity provider to alter attribute values. Attackers can inject unencoded content into the service provider form, undermining attribute integrity. Access to a trusted identity provider is required.

Summarized by @cf/meta/llama-3.3-70b-instruct-fp8-fast. Verify details against the original sources.

Attack conditions

No attack-condition excerpt has been identified here. Review the full source description and references for authentication, network access, and configuration requirements.

Review supporting sources →

Affected versions

Check the exact model, release, and any platform requirements against your installation.

OpenIdentityPlatform · VulnCheck

OpenAM

2 ranges

VulnCheck version evidence

Package identity

pkg:maven/org.openidentityplatform.openam/openam-federation-libraryExplore org.openidentityplatform.openam:openam-federation-library →

Identity supplied by VulnCheck. Version matching requires compatible range evidence.

Check a product version

Compare with this publisher’s ranges. This does not inspect your installation.

affected

0 → before 16.1.4

semver versions

unaffected

16.1.4

semver versions

Other versions: unaffected

Automatic dependency matching is unavailable for this record. Use the product evidence and publisher’s instructions to check your installation.

What to do

Compare your installed product and version with the affected versions above. A matching product name alone does not confirm exposure.

No structured fix or remediation guidance is available here. Check the full source description and vendor’s latest advisory for a patch or workaround; do not assume another version is safe.

cve.new guidance unless attributed to a publisher. This page does not inspect your installation.

Public exploit evidence

No public exploit reference is identified in the imported evidence. This is not a claim that no exploit exists.

Original source description

Read the full publisher description

OpenAM before 16.1.4 contains an incomplete output encoding vulnerability that allows a SAML 1.x identity provider to alter attribute values by injecting unencoded content into the service provider auto-submitted form. Attackers controlling a trusted identity provider can craft assertion attribute names or values that reach the target application in modified form, undermining the integrity of received attributes.

References

2 sources

OpenIdentityPlatform/OpenAM · security/advisories/GHSA-pw99-8h4m-p3gm

Vendor advisoryVulnCheck

www.vulncheck.com/advisories/openam-before-16.1.4-incomplete-attribute-encoding-in-saml-1-x-form-post

Security advisoryVulnCheck

Inside the record

Evidence available

Package identity

Version evidence

Remediation guidance · not supplied

Weakness classification

Additional publishers

Describes the evidence in this view, not whether the product is safe.

Original records

CVE-2026-123540

View the latest unmodified CVE JSON from the official source. It may be newer than this imported page.

cve.new JSON →

Underlying weaknesses

The source’s classification of what caused the vulnerability.

CWE-116 ↗

Improper Encoding or Escaping of Output

VulnCheck

Environment requirements

These conditions apply together as specified by the publisher. A matching product name alone does not establish exposure.

VulnCheck · platform conditions

Any condition may hold

Vulnerable product

cpe:2.3:a:openidentityplatform:openam:*:*:*:*:*:*:*:*

From (inclusive):

After:

Through (inclusive):

Before: 16.1.4

Applicability preview

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  {
    "nodes": [
      {
        "operator": "OR",
        "negate": false,
        "cpeMatch": [
          {
            "vulnerable": true,
            "criteria": "cpe:2.3:a:openidentityplatform:openam:*:*:*:*:*:*:*:*",
            "versionEndExcluding": "16.1.4"
          }
        ]
      }
    ]
  }
]

Contributing organizations · 2

VulnCheck

Assigning organization

2026-11-08

CISA-ADP

Additional data publisher

2026-11-12

Timeline

All times UTC

8 Nov 2026, 01:37
Advisory published
Publication date supplied by the source.
12 Nov 2026, 12:52
Source updated
Latest modification date supplied by the source.
12 Nov 2026, 20:12
Last imported by cve.new
Latest catalog import, not the date we first saw this advisory.

What changed

Follow changes

CVE · CVE-2026-1235402026-11-12

Observed 2026-11-12T20:12:10.912Z · upstream updated 2026-11-12T12:52:06.326Z

Prioritization updated

before

[]

after

[
  {
    "source": "CISA-ADP",
    "type": "SSVC",
    "role": "CISA Coordinator",
    "timestamp": "2026-11-12T12:51:17.655557Z",
    "decisions": [
      {
        "name": "Exploitation",
        "value": "none"
      },
      {
        "name": "Automatable",
        "value": "no"
      },
      {
        "name": "Technical Impact",
        "value": "partial"
      }
    ]
  }
]

Large field values are marked as truncated previews. Original source snapshots remain retained.

Showing up to 50 most recent observed changes.

Reading the signals

Severity · CVSS: Technical impact and attack conditions. The headline is the highest imported catalog score; sources may disagree.
Observed exploitation · KEV: An absent or unavailable KEV listing does not establish that exploitation has not occurred.
Predicted exploitation · EPSS: No EPSS estimate available in this record.

CISA-ADP · SSVC

CISA Coordinator · 2026-11-12

Exploitation: none
Automatable: no
Technical Impact: partial

SSVC describes the publisher’s decision context. Your organization’s exposure and priorities may differ.

Record identifiers

Aliases: None recorded

Source evidence

Request a correction or dispute

Start with the assigning organization for this record. Include the CVE ID, the disputed information, and supporting evidence. A dispute does not itself reject a record.

Find the responsible CNA →Official dispute and escalation process ↗

CVE CVE-2026-123540