CVE-2026-27142Disclosure(golang / go)

LOWCVSS 6.1 · MEDIUM

Signal is active with 1 mentions in latest observed window

Immediate actions

  • Patch golang go systems immediately

Recommended action window: Monitor and triage in normal cycle

NVD description

Actions which insert URLs into the content attribute of HTML meta tags are not escaped. This can allow XSS if the meta tag also has an http-equiv attribute with the value "refresh". A new GODEBUG setting has been added, htmlmetacontenturlescape, which can be used to disable escaping URLs in actions in the meta content attribute which follow "url=" by setting htmlmetacontenturlescape=0.

0.5/ 10 priority

Sources & remediation

Vendor / third-party advisories
Weakness type (CWE)
CWE-79

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

AVAILABLE

Momentum

STABLE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

  • go

Threat summary

  • Patch or workaround signal is available
  • 8 mentions across 5 observed days
  • Momentum state: stable

What's happening

  • Patch or workaround mentioned in 2 signals
  • Technical details provided in 6 signals
  • Disclosure: 4 classified signals
  • General: 2 classified signals
  • Peaked 3d ago at 3 mentions (2026-03-07); latest day: 1
  • 8 total mentions across 5 days

Affected systems

Vendors
Products
go

1 version affected across 1 product

Deep dive

Activity timeline8 mentions / 5d
01223Mentions · 2026-03-06: 1Mentions · 2026-03-07: 3Mentions · 2026-03-09: 2Mentions · 2026-03-20: 1Mentions · 2026-05-07: 1Patch / Workaround · 2026-03-06: 1Patch / Workaround · 2026-03-09: 1Technical Details · 2026-03-07: 3Technical Details · 2026-03-09: 2Technical Details · 2026-05-07: 103-0603-0703-0903-2005-07
Signal classification3 categories
Disclosure
450.0%
Patch
225.0%
General
225.0%
Referenced assets8 URLs
Classification over time
DateTotalLabels
2026-03-061
Patch1
2026-03-073
Disclosure3
2026-03-092
Disclosure1Patch1
2026-03-201
General1
2026-05-071
General1
Full discourse8 posts
  • Go@golang
    Patch

    🌟 Go 1.26.1 and 1.25.8 are released! 🔐 Security: Includes security fixes for the standard library (CVE-2026-25679, CVE-2026-27137, CVE-2026-27138, CVE-2026-27139, CVE-2026-27142). 🗣 Announcement: https://groups.google.com/g/golang-announce/c/EdhZqrQ98hk/m/41DopX_WAAAJ ⬇️ Download: https://go.dev/dl/#go1.26.1 #golang https://t.co/20adn9vysT

    Post summary

    Go 1.26.1 and 1.25.8 releases include security fixes for five CVEs, with no PoC, exploit details, or active exploitation reports mentioned.

    511196015260.9K
    207.1K followersView on X
  • Open Source Security mailing list@oss_security
    Disclosure

    Go CVE-2026-27142: html/template: URLs in meta content attribute actions are not escaped CVE-2026-25679: net/url: reject IPv6 literal not at start of host CVE-2026-27139: os: FileInfo can escape from a Root

    Post summary

    The text lists three newly disclosed Go library vulnerabilities with brief technical details, but lacks evidence of PoC, exploit code, active exploitation, or patches.

    00010241
    4.4K followersView on X
  • Vulmon Vulnerability Feed@VulmonFeeds
    General

    CVE-2026-39823 Meta Tag URL Escaping Vulnerability Leading to XSS in CVE-2026-27142 https://vulmon.com/vulnerabilitydetails?qid=CVE-2026-39823

    Post summary

    The snippet lists CVE-2026-39823 and references an XSS vulnerability in CVE-2026-27142, but offers no PoC, exploit code, active exploitation evidence, patch information, or in‑depth technical details.

    0000044
    4.0K followersView on X
  • Lambda Watchdog@LambdaWatchdog
    General

    🔍 Lambda Watchdog detected that CVE-2026-27142 is no longer present in latest AWS Lambda base image scans. https://github.com/aws/aws-lambda-base-images/issues/439 #AWS #Lambda #Security #CVE #DevOps #SecOps

    Post summary

    The tweet notes that CVE-2026-27142 is not detected in the latest AWS Lambda base image scans, with no evidence of exploitation, patching, or detailed technical information.

    0000034
    31 followersView on X
  • Ferramentas Linux@Cezar_H_Linux
    Patch

    🔒 Urgent: #openSUSE Tumbleweed patches 3 critical Go vulns (CVE-2026-25679, CVE-2026-27139, CVE-2026-27142). Update go1.25 to 1.25.8-1.1 now to mitigate crypto bypass, path traversal & HTTP DoS attacks. Read more: 👉 https://tinyurl.com/ym2ahjs8 #Security https://t.co/PLdX24JVrj

    Post summary

    openSUSE Tumbleweed has issued patches for three critical Go vulnerabilities (CVE-2026‑25679, CVE-2026‑27139, CVE-2026‑27142) and advises users to update to go1.25.8‑1.1 to mitigate crypto bypass, path traversal, and HTTP DoS attacks.

    0000059
    1.3K followersView on X
  • Infoflowcloud@infoflowcloud
    Disclosure

    🚨*CVE* CVE-2026-27142 Actions which insert URLs into the content attribute of HTML meta tags are not escaped. This can allow XSS if the meta tag also has an http-equiv attribute with the v… https://www.cve.org/CVERecord?id=CVE-2026-27142 ----- Traducción: Las acciones que i… http://infoflow.cloud`

    Post summary

    The tweet announces CVE-2026-27142, noting that unescaped URLs in meta tag content can cause XSS, but there is no mention of PoC, exploit, patch, or active exploitation.

    0000024
    56 followersView on X
  • CVE@CVEnew
    Disclosure

    CVE-2026-27142 Actions which insert URLs into the content attribute of HTML meta tags are not escaped. This can allow XSS if the meta tag also has an http-equiv attribute with the v… https://www.cve.org/CVERecord?id=CVE-2026-27142

    Post summary

    The content announces CVE-2026-27142, highlighting an XSS flaw caused by unescaped URLs in meta tags, but provides no proof‑of‑concept, exploit, active use, or patch information.

    00000198
    56.6K followersView on X
  • Lambda Watchdog@LambdaWatchdog
    Disclosure

    🚨 New UNKNOWN CVE detected in AWS Lambda 🚨 CVE-2026-27142 impacts stdlib in 27 Lambda base images. Details: https://github.com/aws/aws-lambda-base-images/issues/439 More: https://lambdawatchdog.com/ #AWS #Lambda #CVE #CloudSecurity #Serverless

    Post summary

    A new CVE affecting AWS Lambda base images’ stdlib has been announced, with links to issue details and additional information.

    0000033
    31 followersView on X
CPE platform detail2 entries

2 of 2 entries

PartVendorProductVersionTarget SWTarget HW
Appgolanggo---
Appgolanggo1.26.0--

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