CVE-2025-46653
Formidable relies on hexoid to prevent guessing of filenames for untrusted executable content
Formidable (aka node-formidable) 2.1.0 through 3.x before 3.5.3 relies on hexoid to prevent guessing of filenames for untrusted executable content; however, hexoid is documented as not "cryptographically secure." (Also, there is a scenario in which only the last two characters of a hexoid string need to be guessed, but this is not often relevant.) NOTE: this does not imply that, in a typical use case, attackers will be able to exploit any hexoid behavior to upload and execute their own content.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- High
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- Low
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
3.1
Formidable (aka node-formidable) 2.1.0 through 3.x before 3.5.3 relies on hexoid to prevent guessing of filenames for untrusted executable content; however, hexoid is documented as not "cryptographically secure." (Also, there is a scenario in which only the last two characters of a hexoid string need to be guessed, but this is not often relevant.) NOTE: this does not imply that, in a typical use case, attackers will be able to exploit any hexoid behavior to upload and execute their own content.
- Record
CVE-2025-46653- CVSS 3.1
- 3.1 Low
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N - Weakness
- CWE-338
- Updated
- 2026-11-02
EUVDEUVD-2025-12478
3.1
Formidable (aka node-formidable) 2.1.0 through 3.x before 3.5.3 relies on hexoid to prevent guessing of filenames for untrusted executable content; however, hexoid is documented as not "cryptographically secure." (Also, there is a scenario in which only the last two characters of a hexoid string need to be guessed, but this is not often relevant.) NOTE: this does not imply that, in a typical use case, attackers will be able to exploit any hexoid behavior to upload and execute their own content.
- Record
EUVD-2025-12478- CVSS 3.1
- 3.1 Low
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-75v8-2h7p-7m2m
3.1
Formidable relies on hexoid to prevent guessing of filenames for untrusted executable content
Formidable (aka node-formidable) 2.x before 2.1.3 and 3.x before 3.5.3 relies on hexoid to prevent guessing of filenames for untrusted executable content; however, hexoid is documented as not "cryptographically secure." (Also, there is a scenario in which only the last two characters of a hexoid string need to be guessed, but this is not often relevant.) NOTE: this does not imply that, in a typical use case, attackers will be able to exploit any hexoid behavior to upload and execute their own content.
- Record
GHSA-75v8-2h7p-7m2m- CVSS 3.1
- 3.1 Low
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N - Weakness
- CWE-338
- Updated
- 2026-11-02
NVD
3.1
Formidable (aka node-formidable) 2.1.0 through 3.x before 3.5.3 relies on hexoid to prevent guessing of filenames for untrusted executable content; however, hexoid is documented as not "cryptographically secure." (Also, there is a scenario in which only the last two characters of a hexoid string need to be guessed, but this is not often relevant.) NOTE: this does not imply that, in a typical use case, attackers will be able to exploit any hexoid behavior to upload and execute their own content.
- Record
CVE-2025-46653- CVSS 3.1
- 3.1 Low
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N - Weakness
- CWE-338
- Updated
- 2026-11-02
OSV
3.1
Formidable (aka node-formidable) 2.1.0 through 3.x before 3.5.3 relies on hexoid to prevent guessing of filenames for untrusted executable content; however, hexoid is documented as not "cryptographically secure." (Also, there is a scenario in which only the last two characters of a hexoid string need to be guessed, but this is not often relevant.) NOTE: this does not imply that, in a typical use case, attackers will be able to exploit any hexoid behavior to upload and execute their own content.
- Record
CVE-2025-46653- CVSS 3.1
- 3.1 Low
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N - Weakness
- CWE-338
- Updated
- 2026-11-02
OSVDEBIAN-CVE-2025-46653
3.1
Formidable (aka node-formidable) 2.1.0 through 3.x before 3.5.3 relies on hexoid to prevent guessing of filenames for untrusted executable content; however, hexoid is documented as not "cryptographically secure." (Also, there is a scenario in which only the last two characters of a hexoid string need to be guessed, but this is not often relevant.) NOTE: this does not imply that, in a typical use case, attackers will be able to exploit any hexoid behavior to upload and execute their own content.
- Record
DEBIAN-CVE-2025-46653- CVSS 3.1
- 3.1 Low
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N - Updated
- 2026-11-02
OSVGHSA-75v8-2h7p-7m2m
3.1
Formidable relies on hexoid to prevent guessing of filenames for untrusted executable content
Formidable (aka node-formidable) 2.x before 2.1.3 and 3.x before 3.5.3 relies on hexoid to prevent guessing of filenames for untrusted executable content; however, hexoid is documented as not "cryptographically secure." (Also, there is a scenario in which only the last two characters of a hexoid string need to be guessed, but this is not often relevant.) NOTE: this does not imply that, in a typical use case, attackers will be able to exploit any hexoid behavior to upload and execute their own content.
- Record
GHSA-75v8-2h7p-7m2m- CVSS 3.1
- 3.1 Low
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N - Weakness
- CWE-338
- Updated
- 2026-11-02
OSVUBUNTU-CVE-2025-46653
3.1
Formidable (aka node-formidable) 2.1.0 through 3.x before 3.5.3 relies on hexoid to prevent guessing of filenames for untrusted executable content; however, hexoid is documented as not "cryptographically secure." (Also, there is a scenario in which only the last two characters of a hexoid string need to be guessed, but this is not often relevant.) NOTE: this does not imply that, in a typical use case, attackers will be able to exploit any hexoid behavior to upload and execute their own content.
- Record
UBUNTU-CVE-2025-46653- CVSS 3.1
- 3.1 Low
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N - Updated
- 2026-11-02
OSVROOT-APP-NPM-CVE-2025-46653 No score
CVE-2025-46653 in formidable - Patched by Root
Root has patched CVE-2025-46653 in the formidable package for Root:npm. Multiple fixed versions available.
- Record
ROOT-APP-NPM-CVE-2025-46653- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
formidablenpm |
3.1.1-canary.20211030 up to 3.5.3 | 3.5.3 |
formidablenpm |
2.1.0 up to 2.1.3 | 2.1.3 |
node-formidableDebian:12 |
All versions, plus listed versions 3.2.5+20221017git493ec88+~cs4.0.9-13.5.3+~cs11.10.5-13.5.4+~cs11.10.5-13.5.4+~cs11.10.5-2 |
None known |
node-formidableDebian:13 |
All versions, plus listed versions 3.2.5+20221017git493ec88+~cs4.0.9-13.5.3+~cs11.10.5-13.5.4+~cs11.10.5-13.5.4+~cs11.10.5-2 |
None known |
node-formidableDebian:14 |
before 3.5.4+~cs11.10.5-1, plus listed versions 3.2.5+20221017git493ec88+~cs4.0.9-13.5.3+~cs11.10.5-1 |
3.5.4+~cs11.10.5-1 |
formidableRoot:npm |
before 2.1.2-aikido.2 | 2.1.2-aikido.22.1.2-aikido.3 |
@rootio/formidableRoot:npm |
before 2.1.2-root.io.1 | 2.1.2-root.io.12.1.2-root.io.22.1.2-root.io.3 |
node-formidableUbuntu:16.04:LTS |
All versions, plus listed versions 1.0.13-1 |
None known |
node-formidableUbuntu:18.04:LTS |
All versions, plus listed versions 1.0.13-1 |
None known |
node-formidableUbuntu:20.04:LTS |
All versions, plus listed versions 1.2.1-3 |
None known |
Show 5 moreShow less
| Package | Affected | Fixed |
|---|---|---|
node-formidableUbuntu:22.04:LTS |
All versions, plus listed versions 1.2.1+20200129git8231ea6-11.2.1+20200129git8231ea6-23.2.1+20220105git2815e91+~cs4.0.6-4 |
None known |
node-formidableUbuntu:24.04:LTS |
All versions, plus listed versions 3.2.5+20221017git493ec88+~cs4.0.9-1 |
None known |
node-formidableUbuntu:25.10 |
All versions, plus listed versions 3.2.5+20221017git493ec88+~cs4.0.9-1 |
None known |
node-formidableUbuntu:26.10 |
All versions, plus listed versions 3.2.5+20221017git493ec88+~cs4.0.9-13.5.4+~cs11.10.5-13.5.4+~cs11.10.5-2 |
None known |
node-formidableUbuntu:26.04:LTS |
All versions, plus listed versions 3.2.5+20221017git493ec88+~cs4.0.9-1 |
None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2025-46653 is a low vulnerability (CVSS 3.1) in Node-formidable Formidable, published April 26, 2025. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.45%, the 39th percentile. Fixed in formidable 3.5.3.
References
github.com/zast-ai/vulnerability-reports/blob/main/formidable/file_upload/report.md
github.com/node-formidable/formidable/blob/d0fbec13edc8add54a1afb9ce1a8d3db803f8d47/CHANGELOG.md?plain=1
github.com/node-formidable/formidable/commit/022c2c5577dfe14d2947f10909d81b03b6070bf5
nvd.nist.gov/vuln/detail/CVE-2025-46653
github.com/node-formidable/formidable/commit/37a3e89fca1ed68ec674a539f13aafd62221ddaa
npmjs.com/package/formidable/v/2.1.3
Show 7 moreShow less
npmjs.com/package/formidable/v/3.5.3
github.com/advisories/GHSA-75v8-2h7p-7m2m
github.com/CVEProject/cvelistV5/tree/main/cves/2025/46xxx/CVE-2025-46653.json
security-tracker.debian.org/tracker/CVE-2025-46653
github.com/node-formidable/formidable
ubuntu.com/security/CVE-2025-46653
cve.org/CVERecord?id=CVE-2025-46653