[GHSA-jfpg-hfv5-2rf7] Shescape before 2.1.15 (and 3.0.0 before 3.0.2) fails to...

advisories/unreviewed/2026/08/GHSA-jfpg-hfv5-2rf7/GHSA-jfpg-hfv5-2rf7.json

@@ -1,23 +1,54 @@
 {
   "schema_version": "1.4.0",
   "id": "GHSA-jfpg-hfv5-2rf7",
-  "modified": "2026-08-16T00:31:28Z",
+  "modified": "2026-08-16T00:31:29Z",
   "published": "2026-08-16T00:31:28Z",
   "aliases": [
     "CVE-2026-73055"
   ],
-  "details": "Shescape before 2.1.15 (and 3.0.0 before 3.0.2) fails to properly escape tilde (~) characters in assignment contexts on Unix systems where the shell is explicitly configured to \"sh\" or true and /bin/sh points to BusyBox. Using the escape and escapeAll APIs with untrusted input in an assignment prefixed to a command, an attacker can inject a tilde payload to disclose the user's home directory location and, depending on usage, alter the location on which a command operates.",
-  "severity": [
+  "summary": "Shescape: Home-directory disclosure in assignment context on Unix with BusyBox",
+  "details": "Shescape versions before 2.1.15, and versions 3.0.0 through 3.0.1, do not correctly escape tilde (`~`) characters in assignment contexts on Unix systems when `shell` is configured as `\"sh\"` (or `true`) and `/bin/sh` resolves to BusyBox.\n\nWhen the `escape()` or `escapeAll()` APIs are used with untrusted input in an assignment prefixed to a command, tilde expansion can expose the current user's home-directory path and may cause a command to operate on an unintended location.\n\nThe issue is fixed in Shescape 2.1.15 and 3.0.2.",
+  "severity": [],
+  "affected": [
     {
-      "type": "CVSS_V3",
-      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N"
+      "package": {
+        "ecosystem": "npm",
+        "name": "shescape"
+      },
+      "ranges": [
+        {
+          "type": "ECOSYSTEM",
+          "events": [
+            {
+              "introduced": "0"
+            },
+            {
+              "fixed": "2.1.15"
+            }
+          ]
+        }
+      ]
     },
     {
-      "type": "CVSS_V4",
-      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"
+      "package": {
+        "ecosystem": "npm",
+        "name": "shescape"
+      },
+      "ranges": [
+        {
+          "type": "ECOSYSTEM",
+          "events": [
+            {
+              "introduced": "3.0.0"
+            },
+            {
+              "fixed": "3.0.2"
+            }
+          ]
+        }
+      ]
     }
   ],
-  "affected": [],
   "references": [
     {
       "type": "WEB",
@@ -27,6 +58,14 @@
       "type": "ADVISORY",
       "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-73055"
     },
+    {
+      "type": "WEB",
+      "url": "https://github.com/ericcornelissen/shescape/pull/2677"
+    },
+    {
+      "type": "WEB",
+      "url": "https://github.com/ericcornelissen/shescape/pull/2678"
+    },
     {
       "type": "WEB",
       "url": "https://github.com/ericcornelissen/shescape/commit/7cba30594c16a21524706efe2f6c6c9d8923f411"
@@ -35,16 +74,29 @@
       "type": "WEB",
       "url": "https://github.com/ericcornelissen/shescape/commit/d86bf2ae22961c73458bddf70dd06adf9dadb36c"
     },
+    {
+      "type": "PACKAGE",
+      "url": "https://github.com/ericcornelissen/shescape"
+    },
+    {
+      "type": "WEB",
+      "url": "https://github.com/ericcornelissen/shescape/releases/tag/v2.1.15"
+    },
+    {
+      "type": "WEB",
+      "url": "https://github.com/ericcornelissen/shescape/releases/tag/v3.0.2"
+    },
     {
       "type": "WEB",
       "url": "https://www.vulncheck.com/advisories/shescape-before-home-directory-disclosure-via-busybox"
     }
   ],
   "database_specific": {
     "cwe_ids": [
-      "CWE-116"
+      "CWE-116",
+      "CWE-200"
     ],
-    "severity": "CRITICAL",
+    "severity": "LOW",
     "github_reviewed": false,
     "github_reviewed_at": null,
     "nvd_published_at": "2026-08-15T22:16:55Z"