VulnSocial

CVE-2026-42300Patch

LOWCVSS 9.3 · CRITICAL

Signal is active with 1 mentions in latest observed window

Immediate actions

  • Patch affected systems immediately

Recommended action window: Monitor and triage in normal cycle

NVD description

DevGuard provides vulnerability management for the full software supply chain. Prior to 1.2.2, the SessionMiddleware accepts a client-supplied X-Admin-Token HTTP request header and uses its raw string value as the authenticated userID when no Kratos session cookie is present. An unauthenticated attacker who knows or can guess a target user's Kratos identity UUID can issue requests as that user. Where the target user is an organisation admin or owner, this gives the attacker full control over that organisation's DevGuard resources. This vulnerability is fixed in 1.2.2.

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0.5/ 10 priority

Sources & remediation

Other references
Weakness type (CWE)
CWE-288

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

AVAILABLE

Momentum

STABLE

Threat summary

  • Patch or workaround signal is available
  • 2 mentions across 2 observed days
  • Momentum state: stable

What's happening

  • Patch or workaround mentioned in 1 signal
  • Technical details provided in 2 signals
  • Disclosure: 1 classified signal
  • Peaked 1d ago at 1 mentions (2026-05-06); latest day: 1
  • 2 total mentions across 2 days

Deep dive

Activity timeline2 mentions / 2d
00111Mentions · 2026-05-06: 1Mentions · 2026-05-12: 1Patch / Workaround · 2026-05-06: 1Technical Details · 2026-05-06: 1Technical Details · 2026-05-12: 105-0605-12
Signal classification2 categories
Patch
150.0%
Disclosure
150.0%
Referenced assets1 URL
By indicator
Classification over time
DateTotalLabels
2026-05-061
Patch1
2026-05-121
Disclosure1
Full discourse2 posts
  • Upwind Security MDR@UpwindMDR
    Patch

    🚨Critical - DevGuard Unauthenticated Identity Assertion (CVE-2026-42300) A critical vulnerability in DevGuard allows unauthenticated attackers to bypass authentication using the X-Admin-Token HTTP header. By supplying a target user's UUID in this header, an attacker can gain full administrative control over the organization's DevGuard resources, bypassing the standard Kratos session requirements. 👉 Affected: DevGuard < 1.2.2 | Upgrade to 1.2.2

    Post summary

    The advisory describes a critical authentication bypass in DevGuard using the X‑Admin‑Token header and recommends an upgrade to version 1.2.2 to remediate the issue.

    00021106
    149 followersView on X
  • CVE@CVEnew
    Disclosure

    CVE-2026-42300 DevGuard provides vulnerability management for the full software supply chain. Prior to 1.2.2, the SessionMiddleware accepts a client-supplied X-Admin-Token HTTP requ… https://www.cve.org/CVERecord?id=CVE-2026-42300

    Post summary

    Documentation reveals a flaw in DevGuard’s SessionMiddleware that allows use of a client‑supplied X‑Admin‑Token; no exploit, patch, or active use details are provided.

    00000175
    57.5K followersView on X

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