CVE-2026-42945
EUVD-2026-3001013.05.2026, 16:16
NGINX Plus and NGINX Open Source have a vulnerability in the ngx_http_rewrite_module module. This vulnerability exists when the rewrite directive is followed by a rewrite, if, or set directive and an unnamed Perl-Compatible Regular Expression (PCRE) capture (for example, $1, $2) with a replacement string that includes a question mark (?). An unauthenticated attacker along with conditions beyond its control can exploit this vulnerability by sending crafted HTTP requests. This may cause a heap buffer overflow in the NGINX worker process leading to a restart. Additionally, attackers can execute code on systems with Address Space Layout Randomization (ASLR) disabled or when the attacker can bypass ASLR. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.Enginsight
Affected Products (NVD)
| Vendor | Product | Version |
|---|---|---|
| f5 | dos | 4.3.0 ≤ 𝑥 ≤ 4.7.0 |
| f5 | dos | 4.8.0 |
| f5 | nginx_gateway_fabric | 1.3.0 ≤ 𝑥 ≤ 1.6.2 |
| f5 | nginx_gateway_fabric | 2.0.0 ≤ 𝑥 ≤ 2.5.1 |
| f5 | nginx_ingress_controller | 3.5.0 ≤ 𝑥 ≤ 3.7.2 |
| f5 | nginx_ingress_controller | 4.0.0 ≤ 𝑥 ≤ 4.0.1 |
| f5 | nginx_ingress_controller | 5.0.0 ≤ 𝑥 ≤ 5.4.1 |
| f5 | nginx_instance_manager | 2.16.0 ≤ 𝑥 ≤ 2.21.1 |
| f5 | nginx_open_source | 0.6.27 ≤ 𝑥 ≤ 1.30.0 |
| f5 | nginx_plus | r32 ≤ 𝑥 ≤ r36 |
| f5 | waf | 4.9.0 ≤ 𝑥 ≤ 4.16.0 |
| f5 | waf | 5.1.0 ≤ 𝑥 ≤ 5.8.0 |
| f5 | waf | 5.9.0 ≤ 𝑥 ≤ 5.12.1 |
𝑥
= Vulnerable software versions
Debian Releases
openSUSE / SLES Releases
openSUSE Product | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| nginx |
| ||||||||||||||
| nginx-source |
|
Red Hat Enterprise Linux Releases
Red Hat Product | |||
|---|---|---|---|
| nginx |
| ||
| nginx-all-modules |
| ||
| nginx-core |
| ||
| nginx-filesystem |
| ||
| nginx-mod-devel |
| ||
| nginx-mod-http-image-filter |
| ||
| nginx-mod-http-perl |
| ||
| nginx-mod-http-xslt-filter |
| ||
| nginx-mod-mail |
| ||
| nginx-mod-stream |
|
Amazon Linux Releases
Amazon Package | |||
|---|---|---|---|
| nginx |
| ||
| nginx-all-modules |
| ||
| nginx-core |
| ||
| nginx-core-debuginfo |
| ||
| nginx-debuginfo |
| ||
| nginx-debugsource |
| ||
| nginx-filesystem |
| ||
| nginx-mod-devel |
| ||
| nginx-mod-http-image-filter |
| ||
| nginx-mod-http-image-filter-debuginfo |
| ||
| nginx-mod-http-perl |
| ||
| nginx-mod-http-perl-debuginfo |
| ||
| nginx-mod-http-xslt-filter |
| ||
| nginx-mod-http-xslt-filter-debuginfo |
| ||
| nginx-mod-mail |
| ||
| nginx-mod-mail-debuginfo |
| ||
| nginx-mod-stream |
| ||
| nginx-mod-stream-debuginfo |
|
Common Weakness Enumeration
- CWE-122 - Heap-based Buffer OverflowA heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().
- CWE-131 - Incorrect Calculation of Buffer SizeThe software does not correctly calculate the size to be used when allocating a buffer, which could lead to a buffer overflow.
Vulnerability Media Exposure
References