CVE-2026-39823
Bypass of meta content URL escaping causes XSS in html/template
CVE-2026-39823 is fixed in 71 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
0.0031
24th percentile
CVE-2026-27142 fixed a vulnerability in which URLs were not correctly escaped inside of a <meta> tag's <content> attribute. If the URL content were to insert ASCII whitespaces around the '=' rune inside of the <content> attribute, the escaper would fail to similarly escape it, leading to XSS.
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 |
| captree · amzn 2023 | 2.73-1.amzn2023.0.7 | ALAS2023-2026-1721 | May 25, 2026 |
| captree-debuginfo · amzn 2023 | 2.73-1.amzn2023.0.7 | ALAS2023-2026-1721 | May 25, 2026 |
| cni-plugins · amzn 2023 | 1.7.1-1.amzn2023.0.6 | ALAS2023-2026-1723 | May 25, 2026 |
| cni-plugins-debuginfo · amzn 2023 | 1.7.1-1.amzn2023.0.6 | ALAS2023-2026-1723 | May 25, 2026 |
| cni-plugins-debugsource · amzn 2023 | 1.7.1-1.amzn2023.0.6 | ALAS2023-2026-1723 | 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 |
| git-lfs · amzn 2023 | 3.7.1-80.amzn2023 | ALAS2023-2026-1722 | May 25, 2026 |
| git-lfs-debuginfo · amzn 2023 | 3.7.1-80.amzn2023 | ALAS2023-2026-1722 | May 25, 2026 |
| git-lfs-debugsource · amzn 2023 | 3.7.1-80.amzn2023 | ALAS2023-2026-1722 | 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-2026-39823 | 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 |
| libcap · amzn 2023 | 2.73-1.amzn2023.0.7 | ALAS2023-2026-1721 | May 25, 2026 |
| libcap-debuginfo · amzn 2023 | 2.73-1.amzn2023.0.7 | ALAS2023-2026-1721 | May 25, 2026 |
| libcap-debugsource · amzn 2023 | 2.73-1.amzn2023.0.7 | ALAS2023-2026-1721 | May 25, 2026 |
| libcap-devel · amzn 2023 | 2.73-1.amzn2023.0.7 | ALAS2023-2026-1721 | May 25, 2026 |
| libcap-static · amzn 2023 | 2.73-1.amzn2023.0.7 | ALAS2023-2026-1721 | May 25, 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 |
| rclone · amzn 2023 | 1.73.5-76.amzn2023 | ALAS2023-2026-1717 | May 25, 2026 |
| rclone-debuginfo · amzn 2023 | 1.73.5-76.amzn2023 | ALAS2023-2026-1717 | May 25, 2026 |
| rclone-debugsource · amzn 2023 | 1.73.5-76.amzn2023 | ALAS2023-2026-1717 | 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 |
| yq · amzn 2023 | 4.47.1-13.amzn2023 | ALAS2023-2026-1716 | May 25, 2026 |
| yq-debuginfo · amzn 2023 | 4.47.1-13.amzn2023 | ALAS2023-2026-1716 | May 25, 2026 |
| yq-debugsource · amzn 2023 | 4.47.1-13.amzn2023 | ALAS2023-2026-1716 | May 25, 2026 |
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