Common Weakness Enumeration
CWE-1236
AllowedImproper Neutralization of Formula Elements in a CSV File
Abstraction: Base · Status: Incomplete
The product saves user-provided information into a Comma-Separated Value (CSV) file, but it does not neutralize or incorrectly neutralizes special elements that could be interpreted as a command when the file is opened by a spreadsheet product.
417 vulnerabilities reference this CWE, most recent first.
CVE-2026-46672 (GCVE-0-2026-46672)
Vulnerability from cvelistv5 – Published: 2026-07-07 20:55 – Updated: 2026-07-08 13:00
VLAI
EPSS
VEX
Title
Actual: CSV Formula Injection in `@actual-app/cli` `--format csv` Output via Custom `escapeCsv` Helper
Summary
Actual is a local-first personal finance app. Prior to 26.6.0, @actual-app/cli ships a hand-rolled CSV serializer in packages/cli/src/output.ts used whenever the global --format csv option is passed, whose escapeCsv helper only handles RFC 4180 delimiter, quote, and newline escaping and does not neutralize standard CSV formula-injection prefixes. Any CLI command that streams an object array containing user-controlled strings, including transactions list, accounts list, payees list, categories list, tags list, category-groups list, rules list, schedules list, and query, can emit cells that auto-evaluate when the resulting CSV is opened in Excel, LibreOffice Calc, or Google Sheets, enabling data exfiltration and arbitrary formula execution. This issue is fixed in version 26.6.0.
Severity
4.6 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-08 12:59 UTC
CWE
- CWE-1236 - Improper Neutralization of Formula Elements in a CSV File
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/actualbudget/actual/security/a… | x_refsource_CONFIRM |
| https://github.com/actualbudget/actual/pull/7859 | x_refsource_MISC |
| https://github.com/actualbudget/actual/commit/068… | x_refsource_MISC |
| https://github.com/actualbudget/actual/releases/t… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| actualbudget | actual |
Affected:
< 26.6.0
|
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CVE-2026-42267 (GCVE-0-2026-42267)
Vulnerability from cvelistv5 – Published: 2026-05-08 03:28 – Updated: 2026-05-08 12:58
VLAI
EPSS
VEX
Title
Kimai: Formula Injection via tag names in XLSX export
Summary
Kimai is an open-source time tracking application. From version 2.27.0 to before version 2.54.0, any ROLE_USER can create a tag with a formula string as its name (e.g. =SUM(54+51)) via POST /api/tags and assign it to a timesheet. When an admin exports timesheets to XLSX, ArrayFormatter.formatValue() joins tag names with implode() and returns the result unchanged. OpenSpout promotes any =-prefixed string to a FormulaCell, writing <f>SUM(54+51)</f> into the XLSX archive. Excel evaluates the formula when the file is opened. This issue has been patched in version 2.54.0.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-08 12:57 UTC
CWE
- CWE-1236 - Improper Neutralization of Formula Elements in a CSV File
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/kimai/kimai/security/advisorie… | x_refsource_CONFIRM |
| https://github.com/kimai/kimai/releases/tag/2.54.0 | x_refsource_MISC |
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CVE-2026-41073 (GCVE-0-2026-41073)
Vulnerability from cvelistv5 – Published: 2026-05-22 21:10 – Updated: 2026-05-23 02:57
VLAI
EPSS
VEX
Title
RT: Spreadsheet downloads vulnerable to CSV/formula injection in Microsoft Excel and similar apps
Summary
RT is an open source, enterprise-grade issue and ticket tracking system. Versions prior to 5.0.10 and 6.0.0 through 6.0.2 contain a spreadsheet (CSV/formula) injection vulnerability. User-controlled data in spreadsheet exports is not sanitized before being written to the output file, which can cause spreadsheet applications to interpret crafted values as formulas or macros when the file is opened. This issue has been fixed in versions 5.0.10 and 6.0.3. If developers are unable to upgrade immediately, they can temporarily work around this issue by avoiding opening exported RT spreadsheet files directly in spreadsheet applications when the data may contain untrusted user input.
Severity
4.6 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-23 02:57 UTC
CWE
- CWE-1236 - Improper Neutralization of Formula Elements in a CSV File
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/bestpractical/rt/security/advi… | x_refsource_CONFIRM |
| https://github.com/bestpractical/rt/releases/tag/… | x_refsource_MISC |
| https://github.com/bestpractical/rt/releases/tag/… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| bestpractical | rt |
Affected:
< 5.0.10
Affected: >= 6.0.0, < 6.0.3 |
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CVE-2026-39424 (GCVE-0-2026-39424)
Vulnerability from cvelistv5 – Published: 2026-04-14 00:56 – Updated: 2026-04-16 13:26
VLAI
EPSS
VEX
Title
MaxKB has CSV Injection in its Application Chat Export Functionality
Summary
MaxKB is an open-source AI assistant for enterprise. In versions 2.7.1 and below, the chat export feature is vulnerable to Improper Neutralization of Formula Elements in a CSV File. When an administrator exports the application chat history to an Excel file (.xlsx) via the /admin/api/workspace/{workspace_id}/application/{application_id}/chat/export endpoint, strings starting with formula characters are written directly without proper sanitization. Opening this file in spreadsheet applications like Microsoft Excel can lead to Arbitrary Code Execution (RCE) on the administrator's workstation via Dynamic Data Exchange (DDE). The issue is a variant of CVE-2025-4546, which fixed the exact same pattern in apps/dataset/serializers/document_serializers.py but missed the application chat export sink. This issue has been fixed in version 2.8.0.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-16 13:22 UTC
CWE
- CWE-1236 - Improper Neutralization of Formula Elements in a CSV File
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/1Panel-dev/MaxKB/security/advi… | x_refsource_CONFIRM |
| https://github.com/1Panel-dev/MaxKB/commit/24cd68… | x_refsource_MISC |
| https://github.com/1Panel-dev/MaxKB/releases/tag/v2.8.0 | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| 1Panel-dev | MaxKB |
Affected:
< 2.8.0
|
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CVE-2026-35157 (GCVE-0-2026-35157)
Vulnerability from cvelistv5 – Published: 2026-05-11 09:33 – Updated: 2026-05-12 19:49
VLAI
EPSS
VEX
Summary
Dell ECS versions 3.8.1.0 through 3.8.1.7 and Dell ObjectScale versions prior to 4.3.0.0, contains an improper neutralization of formula elements in a CSV File vulnerability in the UI. An unauthenticated attacker with remote access could potentially exploit this vulnerability, leading to remote execution.
Severity
5.8 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-12 03:55 UTC
CWE
- CWE-1236 - Improper Neutralization of Formula Elements in a CSV File
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://www.dell.com/support/kbdoc/en-us/00046211… | vendor-advisory |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Dell | ECS |
Affected:
0 , < 4.3.0.0 or later
(semver)
|
|
| Dell | ObjectScale |
Affected:
0 , < 4.3.0.0 or later
(semver)
|
Date Public
2026-05-09 18:30
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CVE-2026-27644 (GCVE-0-2026-27644)
Vulnerability from cvelistv5 – Published: 2026-05-05 12:12 – Updated: 2026-05-05 13:11
VLAI
EPSS
VEX
Title
traccar allows CSV formula injection via exported position data
Summary
Traccar is an open source GPS tracking system. In versions between 6.11.1 and 6.13.0, the CSV export functionality writes position data, including user-controlled device and computed attributes, to CSV output without proper escaping. An attacker can inject spreadsheet formulas through exported fields. When a manager or administrator opens the exported CSV file in spreadsheet software, this can cause formula execution and lead to command execution or data exfiltration. This has been patched in version 6.13.0.
Severity
6.5 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-05 13:10 UTC
CWE
- CWE-1236 - Improper Neutralization of Formula Elements in a CSV File
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/traccar/traccar/security/advis… | x_refsource_CONFIRM |
| https://github.com/traccar/traccar/blob/v6.11.1/s… | x_refsource_MISC |
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CVE-2026-24447 (GCVE-0-2026-24447)
Vulnerability from cvelistv5 – Published: 2026-02-04 07:04 – Updated: 2026-02-04 15:55
VLAI
EPSS
VEX
Summary
If a malformed data is input to the affected product, a CSV file downloaded from the affected product may contain such malformed data. When a victim user download and open such a CSV file, the embedded code may be executed in the user's environment. Note that Movable Type 7 series and 8.4 series, which are End-of-Life (EOL), are affected by the vulnerability as well.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-02-04 15:55 UTC
CWE
- CWE-1236 - Improper neutralization of formula elements in a CSV file
Assigner
References
Impacted products
6 products
| Vendor | Product | Version | |
|---|---|---|---|
| Six Apart Ltd. | Movable Type (Software Edition) |
Affected:
9.0.4 to 9.0.5 (9.0 series)
Affected: 8.8.0 to 8.8.1 (8.8 series) Affected: 8.0.2 to 8.0.8 (8.0 series) |
|
| Six Apart Ltd. | Movable Type Advanced (Software Edition) |
Affected:
9.0.4 to 9.0.5 (9.0 series)
Affected: 8.8.0 to 8.8.1 (8.8 series) Affected: 8.0.2 to 8.0.8 (8.0 series) |
|
| Six Apart Ltd. | Movable Type Premium (Software Edition) |
Affected:
9.0.4 (MTP 9.0 series)
Affected: 2.13 and earlier (MTP 2 series) |
|
| Six Apart Ltd. | Movable Type Premium (Advanced Edition) (Software Edition) |
Affected:
9.0.4 (MTP 9.0 series)
Affected: 2.13 and earlier (MTP 2 series) |
|
| Six Apart Ltd. | Movable Type (Cloud Edition) |
Affected:
9.0.5 (9 series)
Affected: 8.8.1 (8 series) |
|
| Six Apart Ltd. | Movable Type Premium (Cloud Edition) |
Affected:
9.0.5 (9 series)
Affected: 2.12 (MTP 2 series) |
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CVE-2026-23873 (GCVE-0-2026-23873)
Vulnerability from cvelistv5 – Published: 2026-01-21 23:26 – Updated: 2026-01-22 21:54
VLAI
EPSS
VEX
Title
HUSTOJ is Vulnerable to Stored CSV Injection (Formula Injection) in Contest Rank Export
Summary
hustoj is an open source online judge based on PHP/C++/MySQL/Linux for ACM/ICPC and NOIP training. All versions are vulnerable to CSV Injection (Formula Injection) through the contest rank export functionality (contestrank.xls.php and admin/ranklist_export.php). The application fails to sanitize user-supplied input (specifically the "Nickname" field) before exporting it to an .xls file (which renders as an HTML table but is opened by Excel). If a malicious user sets their nickname to an Excel formula when an administrator exports and opens the rank list in Microsoft Excel, the formula will be executed. This can lead to arbitrary command execution (RCE) on the administrator's machine or data exfiltration. A fix was not available at the time of publication.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-01-22 21:54 UTC
CWE
- CWE-1236 - Improper Neutralization of Formula Elements in a CSV File
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/zhblue/hustoj/security/advisor… | x_refsource_CONFIRM |
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CVE-2026-18738 (GCVE-0-2026-18738)
Vulnerability from cvelistv5 – Published: 2026-08-03 20:53 – Updated: 2026-08-04 15:05
VLAI
EPSS
VEX
Title
Shlink CSV Formula Injection via Visit Export CLI
Summary
Shlink versions 5.0.0 through 5.1.5 contain a CSV formula injection vulnerability that allows unauthenticated remote attackers to plant spreadsheet formulas into exported visit data by supplying malicious values in User-Agent, Referer, or request path headers beginning with formula-triggering characters such as =, +, -, or @. Attackers can craft a single unauthenticated request against any short URL to embed DDE or WEBSERVICE formula payloads into CSV cells, which are then executed on an administrator's client machine when the exported CSV file is opened in a spreadsheet application that evaluates formulas.
Severity
4.7 (Medium)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-04 14:28 UTC
CWE
- CWE-1236 - Improper Neutralization of Formula Elements in a CSV File
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/theopaid/CSV-formula-injection… | vendor-advisory |
| https://github.com/shlinkio/shlink | product |
| https://www.vulncheck.com/advisories/shlink-csv-f… | third-party-advisory |
Date Public
2026-08-03 00:00
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CVE-2026-14846 (GCVE-0-2026-14846)
Vulnerability from cvelistv5 – Published: 2026-07-13 09:31 – Updated: 2026-07-13 14:12
VLAI
EPSS
VEX
Title
Incorrect neutralisation in the PrestaShop firmware
Summary
In version 8.2.1 of PrestaShop, there is a vulnerability relating to the incorrect sanitisation of elements, caused by inadequate validation of the ‘Alias’ parameter in the ‘Update your address’ function. This flaw allows an attacker to inject malicious expressions that are executed when the information is exported using the ‘Get my data in CSV’ tool. Successful exploitation of this vulnerability could facilitate unauthorised access to the victim’s personal data.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-13 14:11 UTC
CWE
- CWE-1236 - Improper neutralization of formula elements in a CSV file
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| PrestaShop | The firmware |
Affected:
8.2.1
|
Date Public
2026-07-13 09:28
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Mitigation
Implementation
When generating CSV output, ensure that formula-sensitive metacharacters are effectively escaped or removed from all data before storage in the resultant CSV. Risky characters include '=' (equal), '+' (plus), '-' (minus), and '@' (at).
Mitigation
Implementation
If a field starts with a formula character, prepend it with a ' (single apostrophe), which prevents Excel from executing the formula.
Mitigation
Architecture and Design
Certain implementations of spreadsheet software might disallow formulas from executing if the file is untrusted, or if the file is not authored by the current user.
No CAPEC attack patterns related to this CWE.