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01 Record

CVE-2026-27136

Invoking duplicate attributes can cause XSS in golang.org/x/net/html

MediumPUBLISHEDCNA: Go
CNA base score6.1 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
View raw JSON

02 Description

Invoking duplicate attributes can cause XSS in golang.org/x/net/html

03 Exploitation and scoring

Exploitation
Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
SSVC decision
  • ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
  • AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
  • Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.
CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.
EPSS probability
0.22% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 12.8% of scored records. A rank, not a probability.
NVD base score
6.1 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
NVD analysis status
Analyzed. NVD last modified this record on 2026-07-23.
Red Hat severity
Important. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2026-05-22 15:01Z5 MO AGO
Last updated
2026-05-22 16:59Z5 MO AGO
Reserved
2026-02-17
Assigning CNA
Go
Record state
PUBLISHED
Severity
Medium (CVSS 6.1)
CNA CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Weaknesses
  • CWE-1021Improper Restriction of Rendered UI Layers or FramesBase
  • CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')Base
Data version
5.2
Document digest
f8d956c23483a25b9d8b2c39d3a96a1472a3763c1139a7c783e3f70c6c59b780

05 Affected products

VendorProductVersionsPlatforms
golang.org/x/netgolang.org/x/net/html0 to < 0.55.0—

06 References

07 Fixed in

AlmaLinux 9

  • osbuild-composer
    Fixed in 165.1-5.el9_8.alma.1
  • osbuild-composer-core
    Fixed in 165.1-5.el9_8.alma.1
  • osbuild-composer-worker
    Fixed in 165.1-5.el9_8.alma.1
  • podman
    Fixed in 6:5.8.2-4.el9_8
  • podman-docker
    Fixed in 6:5.8.2-4.el9_8
  • podman-plugins
    Fixed in 6:5.8.2-4.el9_8
  • podman-remote
    Fixed in 6:5.8.2-4.el9_8
  • podman-tests
    Fixed in 6:5.8.2-4.el9_8

Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

AlmaLinux 10

  • osbuild-composer
    Fixed in 165.1-5.el10_2.alma.1
  • osbuild-composer-core
    Fixed in 165.1-5.el10_2.alma.1
  • osbuild-composer-worker
    Fixed in 165.1-5.el10_2.alma.1

Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

CloudLinux 9

  • osbuild-composer
    Fixed in 165.1-5.el9_8.alma.1
  • osbuild-composer-core
    Fixed in 165.1-5.el9_8.alma.1
  • osbuild-composer-worker
    Fixed in 165.1-5.el9_8.alma.1
  • podman
    Fixed in 6:5.8.2-4.el9_8
  • podman-docker
    Fixed in 6:5.8.2-4.el9_8
  • podman-plugins
    Fixed in 6:5.8.2-4.el9_8
  • podman-remote
    Fixed in 6:5.8.2-4.el9_8
  • podman-tests
    Fixed in 6:5.8.2-4.el9_8

Derived from AlmaLinux 9. Partial coverage: only packages taken from AlmaLinux 9 are listed.

Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

CloudLinux 10

  • osbuild-composer
    Fixed in 165.1-5.el10_2.alma.1
  • osbuild-composer-core
    Fixed in 165.1-5.el10_2.alma.1
  • osbuild-composer-worker
    Fixed in 165.1-5.el10_2.alma.1

Derived from AlmaLinux 10. Partial coverage: only packages taken from AlmaLinux 10 are listed.

Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

Debian 12

  • golang-golang-x-net
    No fix yet

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 13

  • golang-golang-x-net
    No fix yet

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 14

  • golang-golang-x-net
    Fixed in 1:0.55.0-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu Pro 16.04 LTS

  • golang-golang-x-net-dev
    No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu Pro 18.04 LTS

  • golang-golang-x-net-dev
    No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu Pro 20.04 LTS

  • golang-golang-x-net-dev
    No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.