Adobe ColdFusion: Server-Side Request Forgery leading to privilege escalation
Summary
CVE-2026-34634 is a Server-Side Request Forgery (SSRF) vulnerability in Adobe ColdFusion 2025 and 2023. Adobe rates the impact as privilege escalation, and the CVE record scores it 8.6 with no authentication required and a changed scope. Adobe's own bulletin lists a different score (7.1) and requires low privileges, so the authentication requirement is unclear and should be treated as possibly unauthenticated until Adobe or NVD clarifies it.
Affected
- Adobe ColdFusion 2025 through 2025.0.13 (all platforms)
- Adobe ColdFusion 2023 through 2023.0.25 (all platforms)
Fixed in
- Adobe ColdFusion 2025 Update 14 (2025.0.14)
- Adobe ColdFusion 2023 Update 26 (2023.0.26)
Workaround
- Unknown. Adobe documents no separate workaround; the fix is to update.
- Until patching is complete, limit Internet exposure of ColdFusion servers.
- Adobe recommends applying the security configuration settings and reviewing the lockdown guides.
Exploitation
- Adobe is not aware of any exploits in the wild for the issues in this update.
- CISA SSVC assessment: exploitation none, automatable yes, technical impact total.
Our recommendation
- Update ColdFusion 2025 to 2025.0.14 and ColdFusion 2023 to 2023.0.26 as a priority.
- Test applications after the upgrade, since Update 26 contains security changes that may require configuration updates.
- Restrict outbound requests from ColdFusion servers where possible and check the advisory's known-issues section regarding sub-resource URLs in rendered HTML.
- Review logs for unusual outbound requests from ColdFusion servers.
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- Adobe Security Bulletin APSB26-144 www.adobe.com
- ColdFusion 2025 updates (Adobe) guides.adobe.com
- ColdFusion 2023 updates (Adobe) guides.adobe.com
- ColdFusion 2023 Release Update 26 (Adobe) guides.adobe.com
- CVE-2026-34634 at Strix www.strix.ai
- CVE-2026-34634 at ThreatInt cve.threatint.com
- Adobe October 2026 security fixes (Blacktree) blacktree.nl
Researched and written up in English and German by an AI (Claude by Anthropic) based on NVD, CISA, EPSS and the sources listed. The vendor information is authoritative. Researched on 1 Nov 2026, 08:18.
Original description (NVD)
ColdFusion is affected by a Server-Side Request Forgery (SSRF) vulnerability that could result in privilege escalation. Exploitation of this issue does not require user interaction. Scope is changed.
NVD references (1)
Sources
The tracker combines official, freely usable data sources – updated continuously:
- NVD (NIST) – CVEs, rating (CVSS), affected products
- CISA KEV – vulnerabilities confirmed by CISA as actively exploited
- CISA Vulnrichment – CISA assessment (SSVC) in the official CVE record
- FIRST EPSS – probability of exploitation
- Microsoft MSRC – Patch Tuesday: vulnerabilities, severity, updates
- PoC-in-GitHub – public proof-of-concept repositories
- Metasploit (Rapid7) – modules of the Metasploit Framework
- Exploit-DB (OffSec) – archive of public exploits (links only)
- Patch days: official vendor pages (linked per vendor) (Vendor patch days)
This product uses data from the NVD API but is not endorsed or certified by the NVD. EPSS data © FIRST.org.
Affected? We can help.
We check whether your systems are affected, install updates and close the gap – continuously with the System Health Checker if you wish.