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Back to active CVEs
Medium · CVSS 5.4CVE-2026-55154

EspoCRM: CSV/Formula Injection sanitizer bypass via leading whitespace/control characters in exportCVE-2026-55154

Answer in brief

CVE-2026-55154 records a Medium severity (CVSS 5.4) vulnerability in EspoCRM: CSV/Formula Injection sanitizer bypass via leading whitespace/control characters in export. The current sources do not mark it as known exploited. The current feed maps espocrm/espocrm (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 15, 2026Updated Oct 15, 2026Source checked Oct 15, 2026First seen by HOL Oct 15, 2026Material review Oct 15, 2026
Upstream Advisory

Key facts

Risk
Medium · CVSS 5.4
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Available

Why this deserves its current priority

CVSS is 5.4. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps espocrm/espocrm (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
espocrm/espocrmgeneric<9.3.99.3.9

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for espocrm/espocrm.
  2. 2Review the reported fix. Update espocrm/espocrm to 9.3.9 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Oct 15, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 15, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Oct 15, 2026

Sources and claim methodology

  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
Upstream source description

EspoCRM is an open source customer relationship management application. Prior to 9.3.9, application/Espo/Tools/Export/Format/Csv/Processor.php, application/Espo/Tools/Export/Format/Xlsx/OpenSpoutProcessor.php, and application/Espo/Tools/Export/Format/Xlsx/PhpSpreadsheetProcessor.php inspect only the first byte in sanitizeCellValue(). An authenticated low-privileged user can store a free-text value whose formula trigger is preceded by whitespace or a control character, causing CSV or XLSX export to omit the leading single-quote formula-neutralization prefix. When a privileged user opens the exported file and accepts applicable spreadsheet security prompts, spreadsheet software can ignore the whitespace or control-character prefix and evaluate the cell as a formula, permitting outbound data disclosure and, on legacy configurations with DDE enabled, command execution. This issue is fixed in version 9.3.9.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • kin-openapi: Unauthenticated panic (DoS) in openapi3filter legacy router via non-canonical/unsupported HTTP method on a static pathSame generic ecosystem
  • kin-openapi spec loader panics on a self-referential additionalProperties $ref (nil-pointer DoS)Same generic ecosystem
  • kin-openapi openapi3filter: nil-pointer panic in ValidateResponse on a response header declared with contentSame generic ecosystem
  • kin-openapi deepObject query decoding repeatedly compiles an invariant regular expressionSame generic ecosystem
  • kin-openapi: ValidationHandler security-requirement bypass via encoded-path operation confusionSame generic ecosystem
  • kin-openapi: YAML NaN/Inf Values Bypass Built-in Guards and Panic via OAS 3.1 Validation PathSame generic ecosystem

Record context

Vulnerability class
Vulnerability
EPSS
Not reported
CWE IDs
CWE-1236
Source
CVE List V5
Source checked
Oct 15, 2026
References
3 linked sources
Open source record