CVE-2026-82710 (GCVE-0-2026-82710)

Vulnerability from cvelistv5 – Published: 2026-09-08 00:23 – Updated: 2026-09-08 14:45
VLAI
Title
Terminal escape sequence injection in mix usage_rules.search_docs via package documentation metadata
Summary
Improper Neutralization of Escape, Meta, or Control Sequences vulnerability in ash-project usage_rules allows a malicious package publisher to inject terminal control sequences into the output of mix usage_rules.search_docs. mix usage_rules.search_docs searches Hex documentation through search.hexdocs.pm, which indexes the documentation of every published package, and prints the matching results (title, package, type, doc reference, and highlighted snippets) to the terminal. The formatter in Mix.Tasks.UsageRules.SearchDocs interpolated those publisher-controlled fields verbatim, neutralizing no terminal control characters; the only transform it applied adds escape sequences rather than removing them. A malicious package can embed ANSI terminal escape sequences (cursor movement, line erase, carriage returns, OSC 52 clipboard writes) in its indexed documentation, so when a developer runs a search that surfaces those docs the sequences reach the terminal unchanged — forging the displayed hexdocs URL or a suggested command, hiding text, or writing to the clipboard. No authentication or privileged position is required; only publishing a package. This issue affects usage_rules: from 0.1.18 before 1.2.8.
Severity
2.3 (Low)
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-08 14:45 UTC
CWE
  • CWE-150 - Improper Neutralization of Escape, Meta, or Control Sequences
Assigner
EEF CNA under the mitre root
CNA scorecard A 97/100 over 357 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
ash-project usage_rules Affected: 0.1.18 , < 1.2.8 (semver)
    cpe:2.3:a:ash-project:usage_rules:*:*:*:*:*:*:*:*
Create a notification for this product.
ash-project usage_rules Affected: 2da7a99536041d63ec1f391d019565789a59595f , < 3b8ebb4117d3272bbd436e6c2432113ba6685dbb (git)
    cpe:2.3:a:ash-project:usage_rules:*:*:*:*:*:*:*:*
Create a notification for this product.
Credits
Peter Ullrich Peter Ullrich Zach Daniel / Ash Project Jonatan Männchen / EEF
Show details on NVD website
To clipboard 

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              "packageName": "ash-project/usage_rules",
              "packageURL": "pkg:github/ash-project/usage_rules",
              "product": "usage_rules",
              "programFiles": [
                "lib/mix/tasks/usage_rules.search_docs.ex"
              ],
              "programRoutines": [
                {
                  "name": "\u0027Elixir.Mix.Tasks.UsageRules.SearchDocs\u0027:format_search_result_markdown/4"
                }
              ],
              "repo": "https://github.com/ash-project/usage_rules",
              "vendor": "ash-project",
              "versions": [
                {
                  "lessThan": "3b8ebb4117d3272bbd436e6c2432113ba6685dbb",
                  "status": "affected",
                  "version": "2da7a99536041d63ec1f391d019565789a59595f",
                  "versionType": "git"
                }
              ]
            }
          ],
          "configurations": [
            {
              "lang": "en",
              "supportingMedia": [
                {
                  "base64": false,
                  "type": "text/html",
                  "value": "\u003cp\u003eReachable only when a developer runs \u003ccode\u003emix usage_rules.search_docs\u003c/code\u003e in a terminal emulator that interprets ANSI escape sequences and the results include documentation from an attacker-published package (for example a broad \u003ccode\u003e--everywhere\u003c/code\u003e search).\u003c/p\u003e"
                },
                {
                  "base64": false,
                  "type": "text/markdown",
                  "value": "Reachable only when a developer runs `mix usage_rules.search_docs` in a terminal emulator that interprets ANSI escape sequences and the results include documentation from an attacker-published package (for example a broad `--everywhere` search)."
                }
              ],
              "value": "Reachable only when a developer runs mix usage_rules.search_docs in a terminal emulator that interprets ANSI escape sequences and the results include documentation from an attacker-published package (for example a broad --everywhere search)."
            }
          ],
          "cpeApplicability": [
            {
              "nodes": [
                {
                  "cpeMatch": [
                    {
                      "criteria": "cpe:2.3:a:ash-project:usage_rules:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "1.2.8",
                      "versionStartIncluding": "0.1.18",
                      "vulnerable": true
                    }
                  ],
                  "negate": false,
                  "operator": "OR"
                }
              ],
              "operator": "AND"
            }
          ],
          "credits": [
            {
              "lang": "en",
              "type": "finder",
              "value": "Peter Ullrich"
            },
            {
              "lang": "en",
              "type": "reporter",
              "value": "Peter Ullrich"
            },
            {
              "lang": "en",
              "type": "remediation developer",
              "value": "Zach Daniel / Ash Project"
            },
            {
              "lang": "en",
              "type": "coordinator",
              "value": "Jonatan M\u00e4nnchen / EEF"
            }
          ],
          "descriptions": [
            {
              "lang": "en",
              "supportingMedia": [
                {
                  "base64": false,
                  "type": "text/html",
                  "value": "\u003cp\u003eImproper Neutralization of Escape, Meta, or Control Sequences vulnerability in ash-project usage_rules allows a malicious package publisher to inject terminal control sequences into the output of \u003ccode\u003emix usage_rules.search_docs\u003c/code\u003e.\u003c/p\u003e\n\u003cp\u003e\u003ccode\u003emix usage_rules.search_docs\u003c/code\u003e searches Hex documentation through \u003ccode\u003esearch.hexdocs.pm\u003c/code\u003e, which indexes the documentation of every published package, and prints the matching results (title, package, type, doc reference, and highlighted snippets) to the terminal. The formatter in \u003ccode\u003eMix.Tasks.UsageRules.SearchDocs\u003c/code\u003e interpolated those publisher-controlled fields verbatim, neutralizing no terminal control characters; the only transform it applied adds escape sequences rather than removing them. A malicious package can embed ANSI terminal escape sequences (cursor movement, line erase, carriage returns, OSC 52 clipboard writes) in its indexed documentation, so when a developer runs a search that surfaces those docs the sequences reach the terminal unchanged \u2014 forging the displayed hexdocs URL or a suggested command, hiding text, or writing to the clipboard. No authentication or privileged position is required; only publishing a package.\u003c/p\u003e\n\u003cp\u003eThis issue affects usage_rules: from 0.1.18 before 1.2.8.\u003c/p\u003e"
                },
                {
                  "base64": false,
                  "type": "text/markdown",
                  "value": "Improper Neutralization of Escape, Meta, or Control Sequences vulnerability in ash-project usage_rules allows a malicious package publisher to inject terminal control sequences into the output of `mix usage_rules.search_docs`.\n\n`mix usage_rules.search_docs` searches Hex documentation through `search.hexdocs.pm`, which indexes the documentation of every published package, and prints the matching results (title, package, type, doc reference, and highlighted snippets) to the terminal. The formatter in `Mix.Tasks.UsageRules.SearchDocs` interpolated those publisher-controlled fields verbatim, neutralizing no terminal control characters; the only transform it applied adds escape sequences rather than removing them. A malicious package can embed ANSI terminal escape sequences (cursor movement, line erase, carriage returns, OSC 52 clipboard writes) in its indexed documentation, so when a developer runs a search that surfaces those docs the sequences reach the terminal unchanged \u2014 forging the displayed hexdocs URL or a suggested command, hiding text, or writing to the clipboard. No authentication or privileged position is required; only publishing a package.\n\nThis issue affects usage_rules: from 0.1.18 before 1.2.8."
                }
              ],
              "value": "Improper Neutralization of Escape, Meta, or Control Sequences vulnerability in ash-project usage_rules allows a malicious package publisher to inject terminal control sequences into the output of mix usage_rules.search_docs.\n\nmix usage_rules.search_docs searches Hex documentation through search.hexdocs.pm, which indexes the documentation of every published package, and prints the matching results (title, package, type, doc reference, and highlighted snippets) to the terminal. The formatter in Mix.Tasks.UsageRules.SearchDocs interpolated those publisher-controlled fields verbatim, neutralizing no terminal control characters; the only transform it applied adds escape sequences rather than removing them. A malicious package can embed ANSI terminal escape sequences (cursor movement, line erase, carriage returns, OSC 52 clipboard writes) in its indexed documentation, so when a developer runs a search that surfaces those docs the sequences reach the terminal unchanged \u2014 forging the displayed hexdocs URL or a suggested command, hiding text, or writing to the clipboard. No authentication or privileged position is required; only publishing a package.\n\nThis issue affects usage_rules: from 0.1.18 before 1.2.8."
            }
          ],
          "impacts": [
            {
              "capecId": "CAPEC-93",
              "descriptions": [
                {
                  "lang": "en",
                  "value": "CAPEC-93 Log Injection-Tampering-Forging"
                }
              ]
            }
          ],
          "metrics": [
            {
              "cvssV4_0": {
                "Automatable": "NOT_DEFINED",
                "Recovery": "NOT_DEFINED",
                "Safety": "NOT_DEFINED",
                "attackComplexity": "LOW",
                "attackRequirements": "PRESENT",
                "attackVector": "NETWORK",
                "baseScore": 2.3,
                "baseSeverity": "LOW",
                "privilegesRequired": "NONE",
                "providerUrgency": "NOT_DEFINED",
                "subAvailabilityImpact": "NONE",
                "subConfidentialityImpact": "NONE",
                "subIntegrityImpact": "NONE",
                "userInteraction": "PASSIVE",
                "valueDensity": "NOT_DEFINED",
                "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N",
                "version": "4.0",
                "vulnAvailabilityImpact": "NONE",
                "vulnConfidentialityImpact": "NONE",
                "vulnIntegrityImpact": "LOW",
                "vulnerabilityResponseEffort": "NOT_DEFINED"
              },
              "format": "CVSS",
              "scenarios": [
                {
                  "lang": "en",
                  "value": "GENERAL"
                }
              ]
            }
          ],
          "problemTypes": [
            {
              "descriptions": [
                {
                  "cweId": "CWE-150",
                  "description": "CWE-150 Improper Neutralization of Escape, Meta, or Control Sequences",
                  "lang": "en",
                  "type": "CWE"
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-09-08T00:23:36.912Z",
            "orgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
            "shortName": "EEF"
          },
          "references": [
            {
              "tags": [
                "vendor-advisory",
                "related"
              ],
              "url": "https://github.com/ash-project/usage_rules/security/advisories/GHSA-j59f-776f-23hp"
            },
            {
              "tags": [
                "related"
              ],
              "url": "https://cna.erlef.org/cves/CVE-2026-82710.html"
            },
            {
              "tags": [
                "related"
              ],
              "url": "https://osv.dev/vulnerability/EEF-CVE-2026-82710"
            },
            {
              "tags": [
                "patch"
              ],
              "url": "https://github.com/ash-project/usage_rules/commit/3b8ebb4117d3272bbd436e6c2432113ba6685dbb"
            }
          ],
          "source": {
            "discovery": "EXTERNAL"
          },
          "title": "Terminal escape sequence injection in mix usage_rules.search_docs via package documentation metadata"
        }
      },
      "cveMetadata": {
        "assignerOrgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
        "assignerShortName": "EEF",
        "cveId": "CVE-2026-82710",
        "datePublished": "2026-09-08T00:23:36.912Z",
        "dateReserved": "2026-09-07T20:30:01.990Z",
        "dateUpdated": "2026-09-08T14:45:23.177Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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