CVE-2026-27654 (GCVE-0-2026-27654)

Vulnerability from cvelistv5 – Published: 2026-03-24 14:13 – Updated: 2026-03-24 15:15
VLAI?
Title
NGINX ngx_http_dav_module vulnerability
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.
Severity ?
8.2 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H
8.8 (High)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N
CWE
  • CWE-122 - Heap-based Buffer Overflow
Assigner
f5
References
Impacted products
Vendor Product Version
F5 NGINX Open Source Affected: 1.29.0 , < 1.29.7 (semver)
Affected: 0.5.13 , < 1.28.3 (semver)
Create a notification for this product.
    F5 NGINX Plus Affected: R36 , < R36 P3 (custom)
Affected: R35 , < R35 P2 (custom)
Affected: R34 , < * (custom)
Affected: R33 , < * (custom)
Affected: R32 , < R32 P5 (custom)
Create a notification for this product.
Date Public ?
2026-03-24 14:00
Credits
F5 acknowledges Calif.io in collaboration with Claude and Anthropic Research for bringing this issue to our attention and following the highest standards of coordinated disclosure.
Show details on NVD website
To clipboard 

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  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.