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TI-2026-18391 Aliases CVE-2026-22904GHSA-p2hc-xm25-6rh8

Stack Overflow via Oversized Cookie Fields in lighttpd

Priority MEDIUM 50CWE-121Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-121 and the CVSS impact.

Summary

Improper length handling when parsing multiple cookie fields (including TRACKID) allows an unauthenticated remote attacker to send oversized cookie values and trigger a stack buffer overflow, resulting in a denial‑of‑service condition and possible remote code execution.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00643 51st percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
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
WAGO0852-13220.0.0 – 2.64—No fix listedCNA
WAGO0852-13280.0.0 – 2.64—No fix listedCNA
WAGO0852-13222.64—No fix listedCNA
WAGO0852-13282.64—No fix listedCNA
  • 0852-1322 VendorWAGO Affected 0.0.0 – 2.64 Fixed in — No fix listed CNA
  • 0852-1328 VendorWAGO Affected 0.0.0 – 2.64 Fixed in — No fix listed CNA
  • 0852-1322 VendorWAGO Affected 2.64 Fixed in — No fix listed CNA
  • 0852-1328 VendorWAGO Affected 2.64 Fixed in — No fix listed CNA

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-22904
  2. 2026-10-03 Alias added: GHSA-p2hc-xm25-6rh8
  3. 2026-10-29 EPSS moved to the 50th–90th percentile

References

Other 1

  • TI-2023-01594 WAGO: WBM Command Injection in multiple products CVSS 3.1CRITICAL 9.8
  • TI-2020-06893 eap.c in pppd in ppp 2.4.2 through 2.4.8 has an rhostname buffer overflow in the eap_request and eap_response functions. CVSS 3.1CRITICAL 9.8
  • TI-2018-09314 An issue was discovered on WAGO e!DISPLAY 762-3000 through 762-3003 devices with firmware… CVSS 3.1HIGH 8.8
  • TI-2025-18921 Unauthenticated File Read via Web Interface CVSS 3.1MEDIUM 4.9
  • TI-2026-18390 Stack Overflow via SESSIONID Cookie in lighttpd CVSS 3.1CRITICAL 9.8
  • TI-2026-03092 Hidden CLI Function Allows Root Access CVSS 3.1CRITICAL 10.0
See all 145 →

Sources

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