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TI-2026-41663 Aliases CVE-2026-57859

e107 Second-Order Code Execution via eval()-Based Deserialization in e_array::unserialize()

Priority HIGH 69CWE-502Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
High
Attack requirements
None
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-502.

Summary

e107 prior to version 2.3.8 contains a code execution vulnerability in the e_array deserialization handler that allows an attacker with out-of-band database write access to execute arbitrary PHP code by storing a crafted payload in the user_prefs column. The e_array::unserialize() function in e107_handlers/core_functions.php performs only a prefix check for the string 'array' before passing the stored value to eval(), causing automatic PHP execution whenever the affected user's preferences are materialized through e_user_pref::load().

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00512 43rd percentileScored 2026-11-07
Fix Fixed e107 (e107inc): 2.3.8

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
e107ince107up to 2.3.72.3.8Patch availableCNA
  • e107 Vendore107inc Affected up to 2.3.7 Fixed in 2.3.8 Patch available CNA

Remediation

  • Fix · CNA e107 (e107inc) Fixed in 2.3.8

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-57859
  2. 2026-10-09 EPSS moved to the 50th–90th percentile
  3. 2026-10-25 EPSS moved to the below the 50th percentile

References

Patch 1

Advisory 1

Other 1

  • TI-2026-74376 Unsafe deserialization in e107 installer enables remote code execution CVSS 3.1CRITICAL 9.8
  • TI-2026-31992 e107: Host Header Injection in e107 password reset enables phishing CVSS 3.1HIGH 8.1
  • TI-2026-36251 e107: Command Injection via shell expansion in ImageMagick resize destination path CVSS 3.1HIGH 7.1
  • TI-2026-34276 e107: CSRF in comment.php moderation endpoints via token-optional validation in session_handler::check() CVSS 3.1MEDIUM 6.5
  • TI-2026-31991 e107: Broken Access Control in e107 comment edit allows cross-user comment modification CVSS 3.1MEDIUM 6.5
  • TI-2026-31993 e107: Server-Side Request Forgery (SSRF) in the remote file fetcher CVSS 3.1MEDIUM 4.3
See all 8 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences