CVE-2026-14898Network attack vector

Secret exfiltration via automatic Markdown image fetching

Published Jul 6, 2026 · Updated Jul 6, 2026

Information disclosure in OpenAI Codex app for macOS before 26.527.31326 allows remote attackers to exfiltrate session data. The Markdown response renderer automatically fetches attacker-directed image URLs that the model has populated with secrets, transmitting their path or query data to an attacker-controlled server. Exploitation requires untrusted content to inject instructions into a Codex response and remote Markdown image rendering to be enabled; demonstrated impact is limited to confidentiality.

CVSS severity6.5
Medium
EPSS probability0.37%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in OpenAI Codex app for macOS before 26.527.31326 allows remote attackers to exfiltrate session data. The Markdown response renderer automatically fetches attacker-directed image URLs that the model has populated with secrets, transmitting their path or query data to an attacker-controlled server. Exploitation requires untrusted content to inject instructions into a Codex response and remote Markdown image rendering to be enabled; demonstrated impact is limited to confidentiality.

The record

CVE
CVE-2026-14898
Published
Jul 6, 2026
Updated
Jul 6, 2026
Vendor
OpenAI
Product
Codex app for macOS
Classifications
CWE-200
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 6, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 6, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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  1. Affected versionversion=0 <26.527.31326

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

OpenAI · Codex app for macOSversion=0 <26.527.31326

Published CVSS scores

6.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-200Exposure of Sensitive Information to an Unauthorized Actor

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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