VulnSocial

CVE-2026-40890Disclosure(gomarkdown / markdown)

LOWCVSS 7.5 · HIGH

Signal is active with 1 mentions in latest observed window

Immediate actions

  • Track advisory updates for patch or workaround availability

Recommended action window: Monitor and triage in normal cycle

NVD description

The package `github.com/gomarkdown/markdown` is a Go library for parsing Markdown text and rendering as HTML. Processing a malformed input containing a < character that is not followed by a > character anywhere in the remaining text with a SmartypantsRenderer will lead to Out of Bounds read or a panic. This vulnerability is fixed with commit 759bbc3e32073c3bc4e25969c132fc520eda2778.

gomarkdown CVEsBack to dashboard
0.0/ 10 priority

Sources & remediation

Patch / fix
Exploit / PoC references
Weakness type (CWE)
CWE-125

Priority

LOW

Exploitation

NONE

PoC

YES

Patch

AVAILABLE

Momentum

STABLE

Are you affected?

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

  • markdown

Threat summary

  • 2 mentions across 2 observed days
  • Momentum state: stable

What's happening

  • Technical details provided in 2 signals
  • Disclosure: 2 classified signals
  • Peaked 1d ago at 1 mentions (2026-04-21); latest day: 1
  • 2 total mentions across 2 days

Affected systems

Vendors
gomarkdown
Products
markdown

Deep dive

Activity timeline2 mentions / 2d
00111Mentions · 2026-04-21: 1Mentions · 2026-04-27: 1Technical Details · 2026-04-21: 1Technical Details · 2026-04-27: 104-2104-27
Signal classification1 categories
Disclosure
2100.0%
Referenced assets4 URLs
Full discourse2 posts
  • CVE@CVEnew
    Disclosure

    CVE-2026-40890 The package `http://github.com/gomarkdown/markdown` is a Go library for parsing Markdown text and rendering as HTML. Processing a malformed input containing a &lt; character th… https://www.cve.org/CVERecord?id=CVE-2026-40890

    Post summary

    CVE-2026-40890 is a vulnerability in the Go library gomarkdown/markdown that is triggered by a malformed input containing a '<' character. No PoC, exploit, patch, or active exploitation is mentioned.

    00000156
    57.3K followersView on X
  • Vulmon Vulnerability Feed@VulmonFeeds
    Disclosure

    CVE-2026-40890 Out of Bounds Read in gomarkdown/markdown SmartypantsRend... https://vulmon.com/vulnerabilitydetails?qid=CVE-2026-40890 Don't wait vulnerability scanning results: https://alerts.vulmon.com/?utm_source=twitter&utm_medium=social&utm_campaign=2102281&utm_content=2

    Post summary

    A short tweet announces CVE‑2026‑40890 as an out‑of‑bounds read in gomarkdown/markdown’s SmartypantsRend component, linking to a vulnerability details page but providing no PoC, exploit, patch, or evidence of active exploitation.

    0000040
    4.0K followersView on X
CPE platform detail1 entries

1 of 1 entries

PartVendorProductVersionTarget SWTarget HW
Appgomarkdownmarkdown-go-

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