Etherpad is a real-time collaborative editor. From 2.6.0 until 3.1.0, Etherpad's src/node/hooks/express/tokenTransfer.ts uses POST /tokenTransfer to store an author token for transfer between browsers and exposes it through GET /tokenTransfer/{uuid}. Although the record includes createdAt, the transfer has no expiration check, is not removed after successful redemption, and is returned by res.send(tokenData), including the raw author token. An unauthenticated attacker who obtains a transfer UUID can repeatedly redeem it, receive fresh author cookies, read the cleartext token, and impersonate the originating author for pad read and write operations. This issue is fixed in version 3.1.0.
CVE-2026-55088
MEDIUMPre-NVD 6.86.8
EchelonGraph scoreLOW confidence
This medium-severity CVE scores 6.8 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit-prediction score not yet available (the EPSS model rescores nightly; freshly-published CVEs typically appear within 48 hours). GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).
Triggered by: NVD CVSS baseline
Sources: secondary
6.8EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
- Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.8Exploit: None knownExposed: 0
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 6.8
- EG Score
- 6.8(low)
- EG Risk
- 35(Track)EG Risk 35/100SSVC: Track
EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).
How it’s computedSeverity68% × 45%Exploitation0% × 40%Automatability30% × 15%Action: Routine — remediate on your standard cadence. - EPSS PROB
- 0%
- EPSS %ILE
- 36%
- KEV
- Not listed
Published
August 13, 2026
Last Modified
August 19, 2026
Advisory Details (4)
Auto-updated Aug 19, 2026🔬 Proof of concept available. Patch available. Sources: github_pr, github_commit, github.
github_commit Patch Available
commit 8c6104c5d5da (ether/etherpad)
Patch available: ether/etherpad v3.1.0 (contains commit 8c6104c5d5da)
https://github.com/ether/etherpad/commit/8c6104c5d5daf41f0d454acc04d42dffa0e0d996github_pr Patch Available
harden: assorted server-side tightening for 3.0.2
Patch available: ether/etherpad v3.1.0 (PR #7784 merged 2026-05-17)
https://github.com/ether/etherpad/pull/7784github Patch Available🟡 PoC Available
Device-to-device author-token transfer endpoint is replayable, never expires, and exposes the cleartext author token · Advisory · ether/etherpad · GitHub
https://github.com/ether/etherpad/security/advisories/GHSA-vqfp-p66c-xrp9Vendor Advisories for CVE-2026-55088(1)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
Weakness Classification(2)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 2× in last 7d / 3× in last 30d)
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
- 2026-08-20 22:55 UTCEPSS rescore
- 2026-08-19 20:23 UTCEG score recompute
- 2026-08-13 14:52 UTCEG score recompute
Related CVEs(same CWE)
Frequently asked(5)
What is CVE-2026-55088?
CVE-2026-55088 is a medium vulnerability published on August 13, 2026. Etherpad is a real-time collaborative editor. From 2.6.0 until 3.1.0, Etherpad's src/node/hooks/express/tokenTransfer.ts uses POST /tokenTransfer to store an author token for transfer between browsers and exposes it through GET /tokenTransfer/{uuid}. Although the record includes createdAt, the…
When was CVE-2026-55088 disclosed?
CVE-2026-55088 was first published in the National Vulnerability Database on August 13, 2026, with the most recent update on August 19, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-55088 actively exploited?
CVE-2026-55088 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 63.7% of all scored CVEs.
What is the CVSS score of CVE-2026-55088?
CVE-2026-55088 has a CVSS v3 base score of 6.8 (NVD). The EG score is currently aggregating — additional source signals are being incorporated as they become available..
How do I remediate CVE-2026-55088?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-55088, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.
Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2026-55088
Is Your Infrastructure Affected by CVE-2026-55088?
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.