CVE-2026-55088: Exposure of Sensitive Information to an Unauthorized Actor

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...

CVE-2026-55090: Improper Neutralization of Input During Web Page Generation

Etherpad is a real-time collaborative editor. Prior to 3.3.0, getHTMLFromAtext in src/node/utils/ExportHtml.ts interpolates values from the exportHtmlAdditionalTagsWithData plugin hook into span data attributes without HTML attribute escaping. A pad editor can place an attacker-controlled value...

CVE-2026-55087: Improper Neutralization of Input During Web Page Generation

Etherpad is a real-time collaborative editor. From 2.1.0 until 3.1.0, Etherpad uses the attacker-controlled x-proxy-path request header in src/node/hooks/express/admin.ts when substituting paths into HTML, JavaScript, and CSS under /admin without sanitization, Vary: x-proxy-path, or Cache-Control...

CVE-2026-55085: Improper Neutralization of Input During Web Page Generation

Etherpad is a real-time collaborative editor. Prior to 3.3.1, result.appendSpan in src/static/js/domline.ts interpolates the start attribute of a numbered list directly into an unquoted ol start attribute before assigning the generated markup to node.innerHTML. ImportEtherpad.setPadRaw in...

PT-2026-78643

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...

PT-2026-78642

Name of the Vulnerable Software and Affected Versions Etherpad versions prior to 3.3.1 Description An issue exists where the result.appendSpan function in src/static/js/domline.ts interpolates the start attribute of a numbered list directly into an unquoted ol start attribute before assigning the...

CVE-2026-55086: Improper Link Resolution Before File Access

Etherpad is a real-time collaborative editor. Prior to 3.1.0, src/node/handler/ImportHandler.ts and src/node/handler/ExportHandler.ts derive temporary filenames from Math.random and place them in os.tmpdir. On a host with a shared world-writable temporary directory, a local unprivileged attacker...

GHSA-2JP7-WWPG-3P9W Etherpad has stored XSS in HTML export via unescaped attribute-pool values

Fix: PR 7905 ether/etherpad. getHTMLFromAtext in src/node/utils/ExportHtml.ts interpolates values from the exportHtmlAdditionalTagsWithData plugin hook into span data-="" without HTML-attribute escaping. The value comes verbatim from the pad attribute pool, which a pad editor controls via a craft...

Etherpad has stored XSS in HTML export via unescaped attribute-pool values

Fix: PR 7905 ether/etherpad. getHTMLFromAtext in src/node/utils/ExportHtml.ts interpolates values from the exportHtmlAdditionalTagsWithData plugin hook into span data-="" without HTML-attribute escaping. The value comes verbatim from the pad attribute pool, which a pad editor controls via a craft...

NPM: Etherpad has stored XSS in HTML export via unescaped attribute-pool values

NPM: Etherpad has stored XSS in HTML export via unescaped attribute-pool values vulnerability discovered by ? in WordPress Npm epetherpad-lite versions = 1.8.14...

Etherpad addressed weak token RNG, login timing, plugin path handling, API request handling

Fix: PR 7906 ether/etherpad. A set of medium/low hardening fixes: - Weak RNG for tokens CWE-330: author/session/readonly IDs were generated with Math.random client and server. Now use crypto.getRandomValues. - Login timing / no failure delay CWE-208/CWE-307: the OIDC interaction login used a...

GHSA-92HR-GMR6-H8CP Etherpad addressed weak token RNG, login timing, plugin path handling, API request handling

Fix: PR 7906 ether/etherpad. A set of medium/low hardening fixes: - Weak RNG for tokens CWE-330: author/session/readonly IDs were generated with Math.random client and server. Now use crypto.getRandomValues. - Login timing / no failure delay CWE-208/CWE-307: the OIDC interaction login used a...

PT-2026-82818

Fix: PR 7906 ether/etherpad. A set of medium/low hardening fixes: - Weak RNG for tokens CWE-330: author/session/readonly IDs were generated with Math.random client and server. Now use crypto.getRandomValues. - Login timing / no failure delay CWE-208/CWE-307: the OIDC interaction login used a...

PT-2026-76895

Name of the Vulnerable Software and Affected Versions Etherpad versions prior to 3.3.0 Description Stored cross-site scripting occurs when the getHTMLFromAtext function in src/node/utils/ExportHtml.ts interpolates values from the exportHtmlAdditionalTagsWithData plugin hook into span data...

CVE-2026-55086

creationtimestamp| type| source ---|---|--- 2026-08-13 16:35:14+00:00| published-proof-of-concept| https://github.com/ether/etherpad/security/advisories/GHSA-2jwf-f4xq-f24h...

CVE-2026-55088

creationtimestamp| type| source ---|---|--- 2026-08-13 16:35:12+00:00| published-proof-of-concept| https://github.com/ether/etherpad/security/advisories/GHSA-vqfp-p66c-xrp9...

CVE-2026-55087

creationtimestamp| type| source ---|---|--- 2026-08-13 14:35:10+00:00| published-proof-of-concept| https://github.com/ether/etherpad/security/advisories/GHSA-fjgc-3mj7-8rg8 2026-08-19 15:00:19+00:00| confirmed|...

GHSA-VQFP-P66C-XRP9 ep_etherpad-lite: Device-to-device author-token transfer endpoint is replayable, never expires, and exposes the cleartext author token

Etherpad's device-to-device author-token transfer endpoint is replayable, never expires, and exposes the cleartext author token in the GET response body Description Etherpad ships an endpoint pair under /tokenTransfer src/node/hooks/express/tokenTransfer.ts that lets a logged-in user move their...

PT-2026-75914

Description src/node/handler/ImportHandler.ts and src/node/handler/ExportHandler.ts both compute their temporary working-file paths as: ts const randNum = Math.floorMath.random 0xFFFFFFFF; const srcFile = $os.tmpdir/etherpad export $randNum.html; const destFile = $os.tmpdir/etherpad export...

PT-2026-76573

Name of the Vulnerable Software and Affected Versions Etherpad versions 2.1.0 through 3.0.0 Description Etherpad fails to properly sanitize the x-proxy-path request header, leading to two distinct issues when client-supplied headers reach the server. First, in src/node/hooks/express/admin.ts, the...