Security readout for executives and security teams
Plain-English summary
AlchemyCMS versions before 7.4.12 and 8.0.3 contain a dangerous code-evaluation flaw. An authenticated, highly privileged attacker who can influence module/resource configuration may execute operating-system commands on the server. This is not listed as known exploited, but successful abuse could fully compromise the application host.
Executive priority
Prioritize patching for internet-facing or business-critical AlchemyCMS sites, especially where many users hold administrative privileges. The exploit prerequisites reduce broad opportunistic risk, but server-side command execution makes successful compromise potentially severe.
Technical view
CVE-2026-23885 is CWE-95 eval injection in Alchemy::ResourcesHelper#resource_url_proxy. The helper used Ruby eval() on resource_handler.engine_name, sourced from module definitions influenced by administrative configuration. Fixed releases replace eval() with send(). CVSS is 6.4 with high privilege and high complexity, but confidentiality, integrity, and availability impacts are high.
Likely exposure
Exposure is limited to AlchemyCMS deployments running versions below 7.4.12, or 8.0.0 alpha through below 8.0.3. Practical exploitation appears to require authenticated high-privilege access and control over relevant administrative/module configuration.
Exploitation context
No active exploitation is indicated in the provided sources, and the CVE is not marked KEV. The risk is highest where administrative accounts are broadly shared, weakly protected, or where untrusted users can manage AlchemyCMS modules/resources.
Researcher notes
The public record identifies the vulnerable file and fix pattern but should not be treated as proof of exploitability in every deployment. CVSS lists high privileges and high complexity. Validate exposure by version and administrative configuration paths, then confirm the eval-to-send fix is present.
Mitigation direction
- Upgrade AlchemyCMS 7.x installations to 7.4.12 or later.
- Upgrade AlchemyCMS 8.x installations to 8.0.3 or later.
- Review vendor advisory and release notes before deploying updates.
- Restrict administrative access until patched.
- Audit privileged AlchemyCMS accounts and remove unnecessary access.
Validation and detection
- Inventory applications using AlchemyCMS.
- Confirm installed AlchemyCMS version against affected ranges.
- Verify patched versions 7.4.12 or 8.0.3 are deployed.
- Review administrative users with module/resource configuration privileges.
- Check change history for unexpected module or resource configuration edits.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-95: Code execution behavior lookup
Code execution and unsafe deserialization weaknesses often justify reviewing execution behavior and process telemetry. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupExecution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2026-23885 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 6.4 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H0.55.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6.4MediumVector: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/AlchemyCMS/alchemy_cms/security/advisories/GHSA-2762-657x-v979CVE reference · x_refsource_CONFIRM
- https://github.com/AlchemyCMS/alchemy_cms/commit/55d03ec600fd9e07faae1138b923790028917d26CVE reference · x_refsource_MISC
- https://github.com/AlchemyCMS/alchemy_cms/commit/563c4ce45bf5813b7823bf3403ca1fc32cb769e7CVE reference · x_refsource_MISC
- https://github.com/AlchemyCMS/alchemy_cms/releases/tag/v7.4.12CVE reference · x_refsource_MISC
- https://github.com/AlchemyCMS/alchemy_cms/releases/tag/v8.0.3CVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Neutralization of Directives in Dynamically Evaluated Code ('Eval Injection')
Improper Neutralization of Directives in Dynamically Evaluated Code ('Eval Injection') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.