CVE-2026-27654

Summary

NGINX Open Source and NGINX Plus have a vulnerability in the ngx_http_dav_module module that might allow an attacker to trigger a buffer overflow to the NGINX worker process; this vulnerability may result in termination of the NGINX worker process or modification of source or destination file names outside the document root. This issue affects NGINX Open Source and NGINX Plus when the configuration file uses DAV module MOVE or COPY methods, prefix location (nonregular expression location configuration), and alias directives. The integrity impact is constrained because the NGINX worker process user has low privileges and does not have access to the entire system. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

Affected Software

VendorProductVersion RangeStatus
F5NGINX Open Source1.29.0 < 1.29.7affected
F5NGINX Open Source0.5.13 < 1.28.3affected
F5NGINX PlusR36 < R36 P3affected
F5NGINX PlusR35 < R35 P2affected
F5NGINX PlusR34 < *affected
F5NGINX PlusR33 < *affected
F5NGINX PlusR32 < R32 P5affected

Weaknesses

  • CWE-122: CWE-122: Heap-based Buffer Overflow

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: yes
    • Technical Impact: partial

NGINX: NGINX: Denial of Service or file modification via buffer overflow in ngx_http_dav_module

Additional References

References