CVE-2026-39825
ReverseProxy forwards queries with more than urlmaxqueryparams parameters in net/http/httputil
CVE-2026-39825 is fixed in 52 products on 2 platforms, first by Go Programming Language 1.26.3, released May 7, 2026. It is not reported as exploited. Patch Radar priority: High.
HighFixed on 2 platforms
CVSS
7.5
Moderate
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0039
33rd percentile
ReverseProxy can forward queries containing parameters not visible to Rewrite functions. When used with a Rewrite function, or a Director function which parses query parameters, ReverseProxy sanitizes the forwarded request to remove query parameters which are not parsed by url.ParseQuery. ReverseProxy does not take ParseQuery's limit on the total number of query parameters (controlled by GODEBUG=urlmaxqueryparams=N) into account. This can permit ReverseProxy to forward a request containing a query parameter that is not visible to the Rewrite function. For example, the query "a1=x&a2=x&...&a10000=x&hidden=y" can forward the parameter "hidden=y" while hiding it from the proxy's Rewrite function.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Windows apps | |||
| Go Programming Language | 1.26.3 | Go Programming Language 1.26.3 | May 7, 2026 |
| Linux | |||
| amazon-cloudwatch-agent · amzn 2023 | 1.300066.2-2.amzn2023 | ALAS2023-2026-1747 | May 25, 2026 |
| amazon-ecr-credential-helper · amzn 2023 | 0.12.0-3.amzn2023 | ALAS2023-2026-1738 | May 25, 2026 |
| compat-golang-github-cpuguy83-md2man-2-devel · amzn 2023 | 2.0.2-24.amzn2023.0.7 | ALAS2023-2026-1749 | May 25, 2026 |
| containerd · amzn 2023 | 2.2.3-1.amzn2023.0.2 | ALAS2023-2026-1737 | May 25, 2026 |
| containerd-debuginfo · amzn 2023 | 2.2.3-1.amzn2023.0.2 | ALAS2023-2026-1737 | May 25, 2026 |
| containerd-debugsource · amzn 2023 | 2.2.3-1.amzn2023.0.2 | ALAS2023-2026-1737 | May 25, 2026 |
| containerd-stress · amzn 2023 | 2.2.3-1.amzn2023.0.2 | ALAS2023-2026-1737 | May 25, 2026 |
| containerd-stress-debuginfo · amzn 2023 | 2.2.3-1.amzn2023.0.2 | ALAS2023-2026-1737 | May 25, 2026 |
| credentials-fetcher · amzn 2023 | 2.0.1-1.amzn2023.0.5 | ALAS2023-2026-1744 | May 25, 2026 |
| delve · RHEL 8 | 0:1.25.2-1.module+el8.10.0+23746+9db33b5e | RHSA-2026:22112 | Jun 1, 2026 |
| delve · almalinux 8 | 1.25.2-1.module_el8.10.0+4074+24330916 | ALSA-2026:22112 | Jun 1, 2026 |
| delve · ol 8 | 0:1.25.2-1.0.1.module+el8.10.0+90715+2d4d8dfd | ELSA-2026-22112 | Jun 2, 2026 |
| delve · rocky 8 | 0:1.25.2-1.module+el8.10.0+40035+ee0a7047 | RLSA-2026:22112 | Aug 26, 2026 |
| docker · amzn 2023 | 25.0.14-1.amzn2023.0.6 | ALAS2023-2026-1736 | May 25, 2026 |
| docker-debuginfo · amzn 2023 | 25.0.14-1.amzn2023.0.6 | ALAS2023-2026-1736 | May 25, 2026 |
| docker-debugsource · amzn 2023 | 25.0.14-1.amzn2023.0.6 | ALAS2023-2026-1736 | May 25, 2026 |
| ecs-init · amzn 2023 | 1.103.2-1.amzn2023 | ALAS2023-2026-1771 | May 25, 2026 |
| go-toolset · RHEL 8 | 0:1.25.10-1.module+el8.10.0+24308+5c4a16b7 | RHSA-2026:22112 | Jun 1, 2026 |
| go-toolset · RHEL 9 | 0:1.26.3-1.el9_8 | RHSA-2026:22121 | Jun 1, 2026 |
| go-toolset · almalinux 8 | 1.25.10-1.module_el8.10.0+4187+c45165c4 | ALSA-2026:22112 | Jun 1, 2026 |
| go-toolset · almalinux 9 | 1.26.3-1.el9_8 | ALSA-2026:22121 | Jun 1, 2026 |
| go-toolset · ol 10 | 0:1.26.5-1.0.1.el10_2 | ELSA-2026-22120 | Jul 21, 2026 |
| go-toolset · ol 8 | 0:1.25.9-1.0.1.module+el8.10.0+90898+1e3c34bb | ELSA-2026-22112 | Jun 2, 2026 |
| go-toolset · ol 9 | 0:1.26.3-1.0.1.el9_8 | ELSA-2026-22121 | Jun 23, 2026 |
| go1.25-openssl · opensuse-leap 16.0 | 1.25.12-160000.1.1 | OPENSUSE-SU-2026:21319-1 | Jul 13, 2026 |
| go1.25-openssl · sles 16.0 | 1.25.12-160000.1.1 | SUSE-SU-2026:22638-1 | Jul 13, 2026 |
| go1.26-openssl · opensuse-leap 16.0 | 1.26.4-160000.1.1 | OPENSUSE-SU-2026:21254-1 | Jul 7, 2026 |
| go1.26-openssl · sles 16.0 | 1.26.4-160000.1.1 | SUSE-SU-2026:22572-1 | Jul 7, 2026 |
| golang · RHEL 10 | 1.26.5-1.el10_0 | RHSA-2026:49702 | May 27, 2026 |
| golang · RHEL 8 | 0:1.25.10-1.module+el8.10.0+24308+5c4a16b7 | RHSA-2026:22112 | Jun 1, 2026 |
| golang · RHEL 9 | 0:1.26.3-1.el9_8 | RHSA-2026:22121 | Jun 1, 2026 |
| golang · almalinux 8 | 1.25.10-1.module_el8.10.0+4187+c45165c4 | ALSA-2026:22112 | Jun 1, 2026 |
| golang · almalinux 9 | 1.26.3-1.el9_8 | ALSA-2026:22121 | Jun 1, 2026 |
| golang · amzn 2023 | 1.25.10-1.amzn2023.0.1 | ALAS2023-2026-1743 | May 25, 2026 |
| golang · ol 10 | 0:1.26.5-1.0.1.el10_2 | ELSA-2026-22120 | Jul 21, 2026 |
| golang · ol 8 | 0:1.25.9-1.0.1.module+el8.10.0+90898+1e3c34bb | ELSA-2026-22112 | Jun 2, 2026 |
| golang · ol 9 | 0:1.26.3-1.0.1.el9_8 | ELSA-2026-22121 | Jun 23, 2026 |
| golang · rocky 10 | 0:1.26.3-4.el10_2 | RLSA-2026:22120 | Aug 26, 2026 |
| golang · rocky 8 | 0:1.25.10-1.module+el8.10.0+40200+0fd0f175 | RLSA-2026:22112 | Aug 26, 2026 |
| golang · rocky 9 | 0:1.26.3-1.el9_8 | RLSA-2026:22121 | Aug 26, 2026 |
| golang-1.26 · Debian 14 | 1.26.3-1 | DEBIAN-CVE-2026-39825 | May 27, 2026 |
| golang-bin · RHEL 8 | 0:1.25.10-1.module+el8.10.0+24308+5c4a16b7 | RHSA-2026:22112 | Jun 1, 2026 |
| golang-bin · RHEL 9 | 0:1.26.3-1.el9_8 | RHSA-2026:22121 | Jun 1, 2026 |
| golang-bin · almalinux 8 | 1.25.10-1.module_el8.10.0+4187+c45165c4 | ALSA-2026:22112 | Jun 1, 2026 |
| golang-bin · almalinux 9 | 1.26.3-1.el9_8 | ALSA-2026:22121 | Jun 1, 2026 |
| golang-bin · amzn 2023 | 1.25.10-1.amzn2023.0.1 | ALAS2023-2026-1743 | May 25, 2026 |
| golang-bin · ol 10 | 0:1.26.5-1.0.1.el10_2 | ELSA-2026-22120 | Jul 21, 2026 |
| golang-bin · ol 8 | 0:1.25.9-1.0.1.module+el8.10.0+90898+1e3c34bb | ELSA-2026-22112 | Jun 2, 2026 |
| golang-bin · ol 9 | 0:1.26.3-1.0.1.el9_8 | ELSA-2026-22121 | Jun 23, 2026 |
| golang-docs · RHEL 8 | 0:1.25.10-1.module+el8.10.0+24308+5c4a16b7 | RHSA-2026:22112 | Jun 1, 2026 |
| golang-docs · RHEL 9 | 0:1.26.3-1.el9_8 | RHSA-2026:22121 | Jun 1, 2026 |
| golang-docs · almalinux 8 | 1.25.10-1.module_el8.10.0+4187+c45165c4 | ALSA-2026:22112 | Jun 1, 2026 |
| golang-docs · almalinux 9 | 1.26.3-1.el9_8 | ALSA-2026:22121 | Jun 1, 2026 |
| golang-docs · amzn 2023 | 1.25.10-1.amzn2023.0.1 | ALAS2023-2026-1743 | May 25, 2026 |
| golang-docs · ol 10 | 0:1.26.5-1.0.1.el10_2 | ELSA-2026-22120 | Jul 21, 2026 |
| golang-docs · ol 8 | 0:1.25.9-1.0.1.module+el8.10.0+90898+1e3c34bb | ELSA-2026-22112 | Jun 2, 2026 |
| golang-docs · ol 9 | 0:1.26.3-1.0.1.el9_8 | ELSA-2026-22121 | Jun 23, 2026 |
| golang-github-burntsushi-toml · amzn 2023 | 1.5.0-1.amzn2023.0.1 | ALAS2023-2026-1751 | May 25, 2026 |
| golang-github-burntsushi-toml-debuginfo · amzn 2023 | 1.5.0-1.amzn2023.0.1 | ALAS2023-2026-1751 | May 25, 2026 |
| golang-github-burntsushi-toml-debugsource · amzn 2023 | 1.5.0-1.amzn2023.0.1 | ALAS2023-2026-1751 | May 25, 2026 |
| golang-github-burntsushi-toml-devel · amzn 2023 | 1.5.0-1.amzn2023.0.1 | ALAS2023-2026-1751 | May 25, 2026 |
| golang-github-burntsushi-toml-test · amzn 2023 | 0.2.0-8.amzn2023.0.3 | ALAS2023-2026-1750 | May 25, 2026 |
| golang-github-burntsushi-toml-test-debuginfo · amzn 2023 | 0.2.0-8.amzn2023.0.3 | ALAS2023-2026-1750 | May 25, 2026 |
| golang-github-burntsushi-toml-test-debugsource · amzn 2023 | 0.2.0-8.amzn2023.0.3 | ALAS2023-2026-1750 | May 25, 2026 |
| golang-github-burntsushi-toml-test-devel · amzn 2023 | 0.2.0-8.amzn2023.0.3 | ALAS2023-2026-1750 | May 25, 2026 |
| golang-github-cpuguy83-md2man · amzn 2023 | 2.0.2-24.amzn2023.0.7 | ALAS2023-2026-1749 | May 25, 2026 |
| golang-github-cpuguy83-md2man-debuginfo · amzn 2023 | 2.0.2-24.amzn2023.0.7 | ALAS2023-2026-1749 | May 25, 2026 |
| golang-github-cpuguy83-md2man-debugsource · amzn 2023 | 2.0.2-24.amzn2023.0.7 | ALAS2023-2026-1749 | May 25, 2026 |
| golang-github-cpuguy83-md2man-devel · amzn 2023 | 2.0.2-24.amzn2023.0.7 | ALAS2023-2026-1749 | May 25, 2026 |
| golang-misc · RHEL 8 | 0:1.25.10-1.module+el8.10.0+24308+5c4a16b7 | RHSA-2026:22112 | Jun 1, 2026 |
| golang-misc · RHEL 9 | 0:1.26.3-1.el9_8 | RHSA-2026:22121 | Jun 1, 2026 |
| golang-misc · almalinux 8 | 1.25.10-1.module_el8.10.0+4187+c45165c4 | ALSA-2026:22112 | Jun 1, 2026 |
| golang-misc · almalinux 9 | 1.26.3-1.el9_8 | ALSA-2026:22121 | Jun 1, 2026 |
| golang-misc · amzn 2023 | 1.25.10-1.amzn2023.0.1 | ALAS2023-2026-1743 | May 25, 2026 |
| golang-misc · ol 10 | 0:1.26.5-1.0.1.el10_2 | ELSA-2026-22120 | Jul 21, 2026 |
| golang-misc · ol 8 | 0:1.25.9-1.0.1.module+el8.10.0+90898+1e3c34bb | ELSA-2026-22112 | Jun 2, 2026 |
| golang-misc · ol 9 | 0:1.26.3-1.0.1.el9_8 | ELSA-2026-22121 | Jun 23, 2026 |
| golang-race · RHEL 8 | 0:1.25.10-1.module+el8.10.0+24308+5c4a16b7 | RHSA-2026:22112 | Jun 1, 2026 |
| golang-race · RHEL 9 | 0:1.26.3-1.el9_8 | RHSA-2026:22121 | Jun 1, 2026 |
| golang-race · almalinux 8 | 1.25.10-1.module_el8.10.0+4187+c45165c4 | ALSA-2026:22112 | Jun 1, 2026 |
| golang-race · almalinux 9 | 1.26.3-1.el9_8 | ALSA-2026:22121 | Jun 1, 2026 |
| golang-race · ol 10 | 0:1.26.5-1.0.1.el10_2 | ELSA-2026-22120 | Jul 21, 2026 |
| golang-race · ol 8 | 0:1.25.9-1.0.1.module+el8.10.0+90898+1e3c34bb | ELSA-2026-22112 | Jun 2, 2026 |
| golang-race · ol 9 | 0:1.26.3-1.0.1.el9_8 | ELSA-2026-22121 | Jun 23, 2026 |
| golang-shared · amzn 2023 | 1.25.10-1.amzn2023.0.1 | ALAS2023-2026-1743 | May 25, 2026 |
| golang-src · RHEL 8 | 0:1.25.10-1.module+el8.10.0+24308+5c4a16b7 | RHSA-2026:22112 | Jun 1, 2026 |
| golang-src · RHEL 9 | 0:1.26.3-1.el9_8 | RHSA-2026:22121 | Jun 1, 2026 |
| golang-src · almalinux 8 | 1.25.10-1.module_el8.10.0+4187+c45165c4 | ALSA-2026:22112 | Jun 1, 2026 |
| golang-src · almalinux 9 | 1.26.3-1.el9_8 | ALSA-2026:22121 | Jun 1, 2026 |
| golang-src · amzn 2023 | 1.25.10-1.amzn2023.0.1 | ALAS2023-2026-1743 | May 25, 2026 |
| golang-src · ol 10 | 0:1.26.5-1.0.1.el10_2 | ELSA-2026-22120 | Jul 21, 2026 |
| golang-src · ol 8 | 0:1.25.9-1.0.1.module+el8.10.0+90898+1e3c34bb | ELSA-2026-22112 | Jun 2, 2026 |
| golang-src · ol 9 | 0:1.26.3-1.0.1.el9_8 | ELSA-2026-22121 | Jun 23, 2026 |
| golang-tests · RHEL 8 | 0:1.25.10-1.module+el8.10.0+24308+5c4a16b7 | RHSA-2026:22112 | Jun 1, 2026 |
| golang-tests · RHEL 9 | 0:1.26.3-1.el9_8 | RHSA-2026:22121 | Jun 1, 2026 |
| golang-tests · almalinux 8 | 1.25.10-1.module_el8.10.0+4187+c45165c4 | ALSA-2026:22112 | Jun 1, 2026 |
| golang-tests · almalinux 9 | 1.26.3-1.el9_8 | ALSA-2026:22121 | Jun 1, 2026 |
| golang-tests · amzn 2023 | 1.25.10-1.amzn2023.0.1 | ALAS2023-2026-1743 | May 25, 2026 |
| golang-tests · ol 10 | 0:1.26.5-1.0.1.el10_2 | ELSA-2026-22120 | Jul 21, 2026 |
| golang-tests · ol 8 | 0:1.25.9-1.0.1.module+el8.10.0+90898+1e3c34bb | ELSA-2026-22112 | Jun 2, 2026 |
| golang-tests · ol 9 | 0:1.26.3-1.0.1.el9_8 | ELSA-2026-22121 | Jun 23, 2026 |
| golist · amzn 2023 | 0.10.4-12.amzn2023.0.9 | ALAS2023-2026-1742 | May 25, 2026 |
| golist-debuginfo · amzn 2023 | 0.10.4-12.amzn2023.0.9 | ALAS2023-2026-1742 | May 25, 2026 |
| golist-debugsource · amzn 2023 | 0.10.4-12.amzn2023.0.9 | ALAS2023-2026-1742 | May 25, 2026 |
| govulncheck-vulndb · opensuse-leap 16.0 | 0.0.20260723T184607-160000.1.1 | OPENSUSE-SU-2026:21483-1 | Jul 30, 2026 |
| nerdctl · amzn 2023 | 2.2.2-1.amzn2023.0.2 | ALAS2023-2026-1735 | May 25, 2026 |
| oci-add-hooks · amzn 2023 | 0-0.1.20200504git268e3bb.amzn2023.0.11 | ALAS2023-2026-1739 | May 25, 2026 |
| oci-add-hooks-debuginfo · amzn 2023 | 0-0.1.20200504git268e3bb.amzn2023.0.11 | ALAS2023-2026-1739 | May 25, 2026 |
| oci-add-hooks-debugsource · amzn 2023 | 0-0.1.20200504git268e3bb.amzn2023.0.11 | ALAS2023-2026-1739 | May 25, 2026 |
| runc · amzn 2023 | 1.3.4-5.amzn2023.0.2 | ALAS2023-2026-1715 | May 25, 2026 |
| runc-debuginfo · amzn 2023 | 1.3.4-5.amzn2023.0.2 | ALAS2023-2026-1715 | May 25, 2026 |
| runc-debugsource · amzn 2023 | 1.3.4-5.amzn2023.0.2 | ALAS2023-2026-1715 | May 25, 2026 |
| runfinch-finch · amzn 2023 | 1.17.0-1.amzn2023.0.2 | ALAS2023-2026-1741 | May 25, 2026 |
| soci-snapshotter · amzn 2023 | 0.13.0-1.amzn2023.0.3 | ALAS2023-2026-1740 | May 25, 2026 |
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