CVE-2026-55089Disclosure

LOWCVSS 9.9 · CRITICAL

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

Etherpad is a real-time collaborative editor. From 2.1.0 until 3.1.0, Etherpad's src/node/handler/APIHandler.ts authorizes requests to /api/2/* in the authorization_code OAuth path by using requiredClaims with the admin claim. This check requires only that the claim exists, while src/node/security/OAuth2Provider.ts issues admin: false for configured non-admin users. A non-admin user with a valid signed token can therefore invoke administrative functions including setHTML, setText, appendText, deletePad, copyPad, movePad, restoreRevision, anonymizeAuthor, listAllPads, and listAuthorsOfPad, allowing disclosure, modification, or deletion of pads across the instance. This issue is fixed in version 3.1.0.

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0.0/ 10 priority

Sources & remediation

Other references

Weakness type (CWE)

CWE-863

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

NONE

Momentum

NONE

Threat summary

1 mentions across 1 observed day

What's happening

Technical details provided in 1 signal
Disclosure: 1 classified signal
1 total mentions across 1 day

Deep dive

Activity timeline1 mentions / 1d

Signal classification1 categories

Disclosure

1100.0%

Referenced assets1 URL

By indicator

https://newnormalsecurity.com/newscan?utm_source=x&utm_medium=social&utm_campaign=daily-cve

Full discourse1 post

NewNormal Security@NewScanTeam47d
Disclosure
NewNormal Security turns the last 24 hours of CVEs into new detections, every day. 𝗗𝗮𝗶𝗹𝘆 𝗖𝗩𝗘 𝗥𝗲𝗽𝗼𝗿𝘁 — 20 Aug 2026 𝗔𝗱𝗱𝗲𝗱 to NewScan 𝘁𝗼𝗱𝗮𝘆: 📤 Unauthenticated file upload in a page-builder form — a PHP file lands in the uploads directory and runs (Elementor Pro CVE-2026-32475) 📦 Outdated self-hosted automation server — code execution in the workflow engine, plus arbitrary file read and write on its host (n8n CVE-2026-77068, CVE-2026-77080) 🔓 Collaborative editor answering its admin API without a key — read, overwrite and delete every document on the server (Etherpad CVE-2026-55089) Test your stack with NewScan — free, self-hosted: https://newnormalsecurity.com/newscan?utm_source=x&utm_medium=social&utm_campaign=daily-cve #infosec #AppSec #RCE #CSO #REDTEAM
Post summary
The post is a daily CVE report that lists newly detected vulnerabilities with technical details, but it does not provide PoC, exploit code, patches, or evidence of active exploitation.
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