CVE-2026-55088

MEDIUMPre-NVD 6.86.8—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.8 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.4% (35th percentile of EPSS-scored CVEs). 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: epss, secondary
6.8EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 6.8Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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.

CVSS v3
6.8
EG Score
6.8MEDIUMmedium confidence
EG Risk
31
EG Risk 31/100CISA SSVC

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 computed
Severity68% × 45%
Exploitation0% × 40%
Automatability0% × 15%
CISA SSVC: Track at low or medium mission impact; Track* at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.4%
EPSS %ILE
35th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track* at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

August 13, 2026

Last Modified

September 9, 2026

Advisory Details (4)

Auto-updated Aug 19, 2026
🔬 Proof of concept available. Patch available. Sources: github_pr, github_commit, github.
generic

GitHub - ether/etherpad at 3.1.0 · GitHub

https://github.com/ether/etherpad/tree/3.1.0
github_commit Patch Available

commit 8c6104c5d5da (ether/etherpad)

Patch available: ether/etherpad v3.1.0 (contains commit 8c6104c5d5da)

https://github.com/ether/etherpad/commit/8c6104c5d5daf41f0d454acc04d42dffa0e0d996
github_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/7784
github 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-xrp9

Vendor 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.

Affected Packages

(1 across 1 ecosystem)
npm(1)
PackageVulnerable rangeFix by version rangeDependents
ep_etherpad-lite—
  • 2.6.0 up to 3.1.0: fixed in 3.1.0
—

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 11× in last 7d / 46× 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.

  1. 2026-10-04 23:22 UTCEPSS rescore
  2. 2026-10-03 19:49 UTCEG score recompute
  3. 2026-10-03 14:26 UTCEPSS rescore
  4. 2026-10-02 17:56 UTCEPSS rescore
  5. 2026-10-02 07:34 UTCEG score recompute
  6. 2026-10-01 19:50 UTCEPSS rescore
  7. 2026-09-30 21:48 UTCEG score recompute
  8. 2026-09-30 15:03 UTCEPSS rescore
  9. 2026-09-29 15:22 UTCEPSS rescore
  10. 2026-09-29 07:18 UTCEG score recompute
  11. 2026-09-28 13:51 UTCEPSS rescore
  12. 2026-09-28 08:32 UTCEG score recompute
  13. 2026-09-27 13:48 UTCEPSS rescore
  14. 2026-09-27 09:45 UTCEG score recompute
  15. 2026-09-26 15:59 UTCEPSS rescore
  16. 2026-09-25 03:34 UTCEG score recompute
  17. 2026-09-24 14:04 UTCEPSS rescore
  18. 2026-09-23 20:50 UTCEG score recompute
  19. 2026-09-23 17:54 UTCEPSS rescore
  20. 2026-09-22 21:01 UTCEG score recompute
  21. 2026-09-20 20:36 UTCEG score recompute
  22. 2026-09-20 20:16 UTCEPSS rescore
  23. 2026-09-19 21:55 UTCEG score recompute
  24. 2026-09-18 23:11 UTCEG score recompute
  25. 2026-09-18 19:28 UTCEPSS rescore
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  1. 2026-09-18 00:29 UTCEG score recompute
  2. 2026-09-17 19:31 UTCEPSS rescore
  3. 2026-09-17 00:02 UTCEG score recompute
  4. 2026-09-16 14:08 UTCEPSS rescore
  5. 2026-09-16 05:15 UTCEPSS rescore
  6. 2026-09-15 15:21 UTCEG score recompute
  7. 2026-09-15 03:11 UTCEPSS rescore
  8. 2026-09-13 17:45 UTCEG score recompute
  9. 2026-09-13 16:47 UTCEPSS rescore
  10. 2026-09-12 19:03 UTCEG score recompute
  11. 2026-09-11 20:21 UTCEG score recompute
  12. 2026-09-11 14:53 UTCEPSS rescore
  13. 2026-09-10 21:23 UTCEG score recompute
  14. 2026-09-10 09:35 UTCEPSS rescore
  15. 2026-09-09 04:58 UTCEG score recompute
  16. 2026-09-08 22:01 UTCEPSS rescore
  17. 2026-09-07 20:39 UTCEG score recompute
  18. 2026-09-07 16:01 UTCEPSS rescore
  19. 2026-09-06 21:56 UTCEG score recompute
  20. 2026-09-06 13:47 UTCEPSS rescore
  21. 2026-09-05 23:14 UTCEG score recompute
  22. 2026-09-05 00:33 UTCEG score recompute
  23. 2026-09-04 05:06 UTCEPSS rescore
  24. 2026-09-02 23:12 UTCEG score recompute
  25. 2026-09-02 14:12 UTCEPSS rescore
  26. 2026-09-01 13:54 UTCEPSS rescore
  27. 2026-09-01 11:23 UTCEG score recompute
  28. 2026-09-01 04:40 UTCEPSS rescore
  29. 2026-08-31 12:35 UTCEG score recompute
  30. 2026-08-30 19:17 UTCEPSS rescore
  31. 2026-08-30 13:53 UTCEG score recompute
  32. 2026-08-30 01:22 UTCEPSS rescore
  33. 2026-08-29 15:09 UTCEG score recompute
  34. 2026-08-28 21:41 UTCEPSS rescore
  35. 2026-08-27 15:09 UTCEG score recompute
  36. 2026-08-27 14:25 UTCEPSS rescore
  37. 2026-08-26 16:27 UTCEG score recompute
  38. 2026-08-26 14:46 UTCEPSS rescore
  39. 2026-08-25 17:20 UTCEG score recompute
  40. 2026-08-25 13:49 UTCEPSS rescore
  41. 2026-08-24 18:38 UTCEG score recompute
  42. 2026-08-23 19:57 UTCEG score recompute
  43. 2026-08-23 00:19 UTCEPSS rescore
  44. 2026-08-22 21:16 UTCEG score recompute
  45. 2026-08-21 23:49 UTCEPSS rescore
  46. 2026-08-21 22:27 UTCEG score recompute
  47. 2026-08-21 22:00 UTCEG score recompute
  48. 2026-08-21 17:46 UTCEG score recompute
  49. 2026-08-20 22:55 UTCEPSS rescore
  50. 2026-08-19 20:23 UTCEG score recompute
  51. 2026-08-13 14:52 UTCEG score recompute

Related CVEs(same product + 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 on August 13, 2026, with the most recent update on September 9, 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 0.4% probability of exploitation in the next 30 days (35th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-55088?
CVE-2026-55088 has a CVSS base score of 6.8 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-55088?
A fix for CVE-2026-55088 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-55088 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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