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CVE-2026-42945

CVE-2026-42945 · NGINX ngx_http_rewrite_module vulnerability

This page contains facts from public vulnerability sources. Check the original advisory before updating.

This page shows selected source facts. See the linked advisories for the complete description and affected versions.

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.

CVSS 9.2 · Critical · EPSS 3.4% · Public exploit · Fix available

Published
Updated

Stack: system · web

Affected products and versions

  • nginx plus

    Versions
    • ≥ R37: Not affected (custom)
    • ≥ R36, < R36 P4: Affected (custom)
    • ≥ R32, < R32 P6: Affected (custom)

    No fix published

  • nginx

    Versions
    • ≥ 1.31.0: Not affected (semver)
    • ≥ 0.6.27, < 1.30.1: Affected (semver)

    Update to 1.30.1

  • nginx Debian:12

    Versions
    • 1.22.1-9
    • 1.22.1-9+deb12u1
    • 1.22.1-9+deb12u2
    • 1.22.1-9+deb12u3
    • 1.22.1-9+deb12u4
    • 1.22.1-9+deb12u5
    • 1.22.1-9+deb12u6
    Affected ranges
    • ECOSYSTEM: < 1.22.1-9+deb12u7

    Update to 1.22.1-9+deb12u7

  • nginx Debian:13

    Versions
    • 1.26.3-3
    • 1.26.3-3+deb13u1
    • 1.26.3-3+deb13u2
    • 1.26.3-3+deb13u3
    • 1.26.3-3+deb13u4
    Affected ranges
    • ECOSYSTEM: < 1.26.3-3+deb13u5

    Update to 1.26.3-3+deb13u5

  • nginx Debian:14

    Versions
    • 1.26.3-3
    • 1.28.0-1
    • 1.28.0-2
    • 1.28.0-3
    • 1.28.0-4
    • 1.28.0-5
    • 1.28.0-6
    • 1.28.1-1
    • 1.28.1-2
    • 1.28.1-3
    • 1.28.2-1
    • 1.28.2-2
    • 1.28.2-3
    • 1.28.2-4
    • 1.28.3-1
    • 1.28.3-2
    • 1.30.0-1
    • 1.30.0-2
    Affected ranges
    • ECOSYSTEM: < 1.30.0-3

    Update to 1.30.0-3

  • nginx Ubuntu:Pro:14.04:LTS

    Versions
    • 1.4.1-3ubuntu1
    • 1.4.3-2ubuntu1
    • 1.4.4-1ubuntu1
    • 1.4.4-2ubuntu1
    • 1.4.4-4ubuntu1
    • 1.4.5-1ubuntu1
    • 1.4.6-1ubuntu2
    • 1.4.6-1ubuntu3
    • 1.4.6-1ubuntu3.1
    • 1.4.6-1ubuntu3.2
    • 1.4.6-1ubuntu3.3
    • 1.4.6-1ubuntu3.4
    • 1.4.6-1ubuntu3.5
    • 1.4.6-1ubuntu3.6
    • 1.4.6-1ubuntu3.7
    • 1.4.6-1ubuntu3.8
    • 1.4.6-1ubuntu3.9
    • 1.4.6-1ubuntu3.9+esm1
    • 1.4.6-1ubuntu3.9+esm2
    • 1.4.6-1ubuntu3.9+esm3
    • 1.4.6-1ubuntu3.9+esm4
    • 1.4.6-1ubuntu3.9+esm5
    Affected ranges
    • ECOSYSTEM: < 1.4.6-1ubuntu3.9+esm6

    Update to 1.4.6-1ubuntu3.9+esm6

  • nginx Ubuntu:Pro:16.04:LTS

    Versions
    • 1.9.3-1ubuntu1
    • 1.9.6-2ubuntu1
    • 1.9.6-2ubuntu2
    • 1.9.9-0ubuntu1
    • 1.9.9-1ubuntu1
    • 1.9.10-0ubuntu1
    • 1.9.10-1ubuntu1
    • 1.9.11-0ubuntu1
    • 1.9.11-0ubuntu2
    • 1.9.12-0ubuntu1
    • 1.9.13-0ubuntu1
    • 1.9.14-0ubuntu1
    • 1.9.15-0ubuntu1
    • 1.10.0-0ubuntu0.16.04.1
    • 1.10.0-0ubuntu0.16.04.2
    • 1.10.0-0ubuntu0.16.04.3
    • 1.10.0-0ubuntu0.16.04.4
    • 1.10.3-0ubuntu0.16.04.1
    • 1.10.3-0ubuntu0.16.04.2
    • 1.10.3-0ubuntu0.16.04.3
    • 1.10.3-0ubuntu0.16.04.4
    • 1.10.3-0ubuntu0.16.04.5
    • 1.10.3-0ubuntu0.16.04.5+esm1
    • 1.10.3-0ubuntu0.16.04.5+esm2
    • 1.10.3-0ubuntu0.16.04.5+esm3
    • 1.10.3-0ubuntu0.16.04.5+esm4
    • 1.10.3-0ubuntu0.16.04.5+esm5
    • 1.10.3-0ubuntu0.16.04.5+esm6
    Affected ranges
    • ECOSYSTEM: < 1.10.3-0ubuntu0.16.04.5+esm7

    Update to 1.10.3-0ubuntu0.16.04.5+esm7

  • nginx Ubuntu:Pro:18.04:LTS

    Versions
    • 1.12.1-0ubuntu2
    • 1.13.6-2ubuntu1
    • 1.13.6-2ubuntu2
    • 1.13.10-1ubuntu1
    • 1.13.12-0ubuntu1
    • 1.14.0-0ubuntu1
    • 1.14.0-0ubuntu1.1
    • 1.14.0-0ubuntu1.2
    • 1.14.0-0ubuntu1.3
    • 1.14.0-0ubuntu1.4
    • 1.14.0-0ubuntu1.5
    • 1.14.0-0ubuntu1.6
    • 1.14.0-0ubuntu1.7
    • 1.14.0-0ubuntu1.9
    • 1.14.0-0ubuntu1.10
    • 1.14.0-0ubuntu1.11
    • 1.14.0-0ubuntu1.11+esm1
    Affected ranges
    • ECOSYSTEM: < 1.14.0-0ubuntu1.11+esm2

    Update to 1.14.0-0ubuntu1.11+esm2

  • nginx Ubuntu:Pro:20.04:LTS

    Versions
    • 1.16.1-0ubuntu2
    • 1.16.1-0ubuntu3
    • 1.17.5-0ubuntu1
    • 1.17.6-0ubuntu1
    • 1.17.7-0ubuntu1
    • 1.17.8-0ubuntu1
    • 1.17.8-0ubuntu2
    • 1.17.8-0ubuntu3
    • 1.17.9-0ubuntu1
    • 1.17.9-0ubuntu2
    • 1.17.9-0ubuntu3
    • 1.17.10-0ubuntu1
    • 1.18.0-0ubuntu1
    • 1.18.0-0ubuntu1.2
    • 1.18.0-0ubuntu1.3
    • 1.18.0-0ubuntu1.4
    • 1.18.0-0ubuntu1.5
    • 1.18.0-0ubuntu1.6
    • 1.18.0-0ubuntu1.7
    Affected ranges
    • ECOSYSTEM: < 1.18.0-0ubuntu1.7+esm1

    Update to 1.18.0-0ubuntu1.7+esm1

  • nginx Ubuntu:22.04:LTS

    Versions
    • 1.18.0-6ubuntu11
    • 1.18.0-6ubuntu12
    • 1.18.0-6ubuntu14
    • 1.18.0-6ubuntu14.1
    • 1.18.0-6ubuntu14.2
    • 1.18.0-6ubuntu14.3
    • 1.18.0-6ubuntu14.4
    • 1.18.0-6ubuntu14.5
    • 1.18.0-6ubuntu14.6
    • 1.18.0-6ubuntu14.7
    • 1.18.0-6ubuntu14.8
    • 1.18.0-6ubuntu14.10
    Affected ranges
    • ECOSYSTEM: < 1.18.0-6ubuntu14.11

    Update to 1.18.0-6ubuntu14.11

  • nginx Ubuntu:24.04:LTS

    Versions
    • 1.24.0-1ubuntu1
    • 1.24.0-2ubuntu1
    • 1.24.0-2ubuntu2
    • 1.24.0-2ubuntu3
    • 1.24.0-2ubuntu4
    • 1.24.0-2ubuntu6
    • 1.24.0-2ubuntu7
    • 1.24.0-2ubuntu7.1
    • 1.24.0-2ubuntu7.3
    • 1.24.0-2ubuntu7.4
    • 1.24.0-2ubuntu7.5
    • 1.24.0-2ubuntu7.6
    • 1.24.0-2ubuntu7.7
    Affected ranges
    • ECOSYSTEM: < 1.24.0-2ubuntu7.8

    Update to 1.24.0-2ubuntu7.8

  • nginx Ubuntu:25.10

    Versions
    • 1.26.3-2ubuntu1
    • 1.26.3-3ubuntu1
    • 1.26.3-3ubuntu2
    • 1.26.3-3ubuntu3
    • 1.28.0-3ubuntu1
    • 1.28.0-4ubuntu1
    • 1.28.0-6ubuntu1
    • 1.28.0-6ubuntu1.1
    • 1.28.0-6ubuntu1.2
    Affected ranges
    • ECOSYSTEM: < 1.28.0-6ubuntu1.3

    Update to 1.28.0-6ubuntu1.3

  • nginx Ubuntu:26.04:LTS

    Versions
    • 1.28.0-6ubuntu1
    • 1.28.1-2ubuntu1
    • 1.28.1-3ubuntu1
    • 1.28.2-2ubuntu1
    • 1.28.3-2ubuntu1
    Affected ranges
    • ECOSYSTEM: < 1.28.3-2ubuntu1.1

    Update to 1.28.3-2ubuntu1.1

Original sources

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