VulnSocial

CVE-2026-29086Disclosure(hono / hono)

LOWCVSS 5.4 · MEDIUM

Signal is active with 1 mentions in latest observed window

Immediate actions

  • Patch hono hono systems immediately

Recommended action window: Monitor and triage in normal cycle

NVD description

Hono is a Web application framework that provides support for any JavaScript runtime. Prior to version 4.12.4, the setCookie() utility did not validate semicolons (;), carriage returns (\r), or newline characters (\n) in the domain and path options when constructing the Set-Cookie header. Because cookie attributes are delimited by semicolons, this could allow injection of additional cookie attributes if untrusted input was passed into these fields. This issue has been patched in version 4.12.4.

hono CVEsBack to dashboard
0.5/ 10 priority

Sources & remediation

Patch / fix
Vendor / third-party advisories
Weakness type (CWE)
CWE-1113

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.

  • hono

Threat summary

  • Patch or workaround signal is available
  • 5 mentions across 4 observed days
  • Momentum state: stable

What's happening

  • Patch or workaround mentioned in 2 signals
  • Technical details provided in 4 signals
  • Disclosure: 3 classified signals
  • Peaked 3d ago at 2 mentions (2026-03-04); latest day: 1
  • 5 total mentions across 4 days

Affected systems

Vendors
hono
Products
hono

Deep dive

Activity timeline5 mentions / 4d
01122Mentions · 2026-03-04: 2Mentions · 2026-03-05: 1Mentions · 2026-03-06: 1Mentions · 2026-03-13: 1Patch / Workaround · 2026-03-04: 1Patch / Workaround · 2026-03-13: 1Technical Details · 2026-03-04: 2Technical Details · 2026-03-05: 1Technical Details · 2026-03-06: 103-0403-0503-0603-13
Signal classification2 categories
Disclosure
360.0%
Patch
240.0%
Referenced assets4 URLs
Classification over time
DateTotalLabels
2026-03-042
Disclosure1Patch1
2026-03-051
Disclosure1
2026-03-061
Disclosure1
2026-03-131
Patch1
Full discourse5 posts
  • Saad Fellahi@SaadFellahii
    Patch

    Finally my first CVEs. Hono.js (v4.12.4) • CVE-2026-29086 • CVE-2026-29085 Fastify (v5.8.1) • CVE-2026-3419 Shoutout to @honojs & @fastifyjs for the quick fixes. Write-ups on the exploit chains coming soon. #AppSec #NodeJS #CVE #BugBounty https://t.co/wLne1JffJS

    Post summary

    The tweet announces three CVEs affecting Hono.js v4.12.4 and Fastify v5.8.1, notes that vendors have issued quick fixes, and indicates detailed write‑ups will follow soon.

    1002165
    42 followersView on X
  • DailyCVE@dailycve
    Disclosure

    🟠 Hono Cookie Attribute Injection (#CVE-2026-29086) – Medium https://dailycve.com/hono-cookie-attribute-injection-cve-2026-29086-medium/

    Post summary

    The post releases details about CVE‑2026‑29086, naming it a medium‑severity Cookie Attribute Injection vulnerability.

    0000036
    166 followersView on X
  • Vulmon Vulnerability Feed@VulmonFeeds
    Disclosure

    CVE-2026-29086 Cookie Injection Vulnerability in Hono Web Framework Before 4.12.4 https://vulmon.com/vulnerabilitydetails?qid=CVE-2026-29086

    Post summary

    A new cookie injection vulnerability (CVE-2026-29086) affecting Hono Web Framework before version 4.12.4 has been disclosed, with technical details provided but no PoC, exploit, or patch information available.

    0000047
    4.0K followersView on X
  • Infoflowcloud@infoflowcloud
    Disclosure

    🚨*CVE* CVE-2026-29086 Hono is a Web application framework that provides support for any JavaScript runtime. Prior to version 4.12.4, the setCookie() utility did not validate semicolons (;)… https://www.cve.org/CVERecord?id=CVE-2026-29086 ----- Traducción: CVE-2026-29086 Hon… http://infoflow.cloud`

    Post summary

    CVE‑2026‑29086 is reported with basic technical details (setCookie() semicolon validation issue) and a link to the CVE record, but lacks a PoC, exploit code, or claim of active exploitation.

    0000036
    55 followersView on X
  • CVE@CVEnew
    Patch

    CVE-2026-29086 Hono is a Web application framework that provides support for any JavaScript runtime. Prior to version 4.12.4, the setCookie() utility did not validate semicolons (;)… https://www.cve.org/CVERecord?id=CVE-2026-29086

    Post summary

    CVE-2026-29086 involves Hono's setCookie() utility failing to validate semicolons, fixed in version 4.12.4.

    00000475
    56.6K followersView on X
CPE platform detail1 entries

1 of 1 entries

PartVendorProductVersionTarget SWTarget HW
Apphonohono-node.js-

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