CVE-2026-4821Disclosure

LOW

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

Rejected reason: This CVE ID has been rejected or withdrawn by its CVE Numbering Authority as it was published in error.

0.0/ 10 priority

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

NONE

Momentum

STABLE

Threat summary

  • 3 mentions across 3 observed days
  • Momentum state: stable

What's happening

  • Technical details provided in 2 signals
  • Disclosure: 2 classified signals
  • General: 1 classified signal
  • Peaked 2d ago at 1 mentions (2026-02-15); latest day: 1
  • 3 total mentions across 3 days

Deep dive

Activity timeline3 mentions / 3d
00111Mentions · 2026-02-15: 1Mentions · 2026-04-24: 1Mentions · 2026-04-26: 1Technical Details · 2026-04-24: 1Technical Details · 2026-04-26: 102-1504-2404-26
Signal classification2 categories
Disclosure
266.7%
General
133.3%
Referenced assets2 URLs
Classification over time
DateTotalLabels
2026-02-151
General1
2026-04-241
Disclosure1
2026-04-261
Disclosure1
Full discourse3 posts
  • Seokchan Yoon / 윤석찬@_seokchan_yoon
    Disclosure

    The RCE vulnerability I found in @github Enterprise Server this month has just been publicly disclosed! > CVE-2026-4821 < https://t.co/UYjFvhTMsj

    Post summary

    The tweet announces the public disclosure of an RCE flaw in GitHub Enterprise Server (CVE‑2026‑4821) without providing PoC, exploit, or patch details.

    21401743213.1K
    747 followersView on X
  • Vulmon Vulnerability Feed@VulmonFeeds
    General

    CVE-2026-4821 OpenExecution Demo https://vulmon.com/vulnerabilitydetails?qid=CVE-2026-4821

    Post summary

    The text merely references CVE-2026-4821 and links to a vulnerability details page, without providing additional details or actionable information.

    0002036
    4.0K followersView on X
  • CVE@CVEnew
    Disclosure

    CVE-2026-4821 An improper neutralization of special elements vulnerability was identified in GitHub Enterprise Server that allowed an authenticated Management Console administrator t… https://www.cve.org/CVERecord?id=CVE-2026-4821

    Post summary

    The brief excerpt announces CVE-2026-4821, an improper neutralization vulnerability affecting GitHub Enterprise Server, but provides no PoC, exploit, or mitigation details.

    00000171
    57.3K followersView on X

Explore more