CVE-2024-34346 json
Deno contains a permission escalation via open of privileged files with missing `--deny` flag
published 2024-05-07 2 y ago modified 2026-09-10 1 mo ago also EUVD-2024-1344 , GHSA-23rx-c3g5-hv9w , JLSEC-2026-107
- cvss
- 8.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 30%
- public exploits
- 0
- none known
Summary
Deno is a JavaScript, TypeScript, and WebAssembly runtime with secure defaults. The Deno sandbox may be unexpectedly weakened by allowing file read/write access to privileged files in various locations on Unix and Windows platforms. For example, reading `/proc/self/environ` may provide access equivalent to `--allow-env`, and writing `/proc/self/mem` may provide access equivalent to `--allow-all`. Users who grant read and write access to the entire filesystem may not realize that these access to these files may have additional, unintended consequences. The documentation did not reflect that this practice should be undertaken to increase the strength of the security sandbox. Users who run code with `--allow-read` or `--allow-write` may unexpectedly end up granting additional permissions via file-system operations. Deno 1.43 and above require explicit `--allow-all` access to read or write `/etc`, `/dev` on unix platform (as well as `/proc` and `/sys` on linux platforms), and any path starting with `\\` on Windows.
Patch / fix
- crates.io deno 1.43.1
- julia Deno_jll 2.0.0+0
- deno deno 1.43.0
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
- Assessed
- 2 y ago
Exploit prediction
0.37% chance of exploitation in the next 30 days, higher than 30% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 8.5 | CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H |
| GitHub | 3.1 | 8.4 | CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H |
| NVD | 3.1 | 9.0 | CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H |
| OSV | 3.1 | 9.0 | CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| crates.io | deno | <1.43.1 |
1.43.1 |
| julia | Deno_jll | <2.0.0+0 |
2.0.0+0 |
Affected products
- denoland deno
- deno deno
Classification
- Weakness
-
- CWE-863 Incorrect Authorization
References
-
github.com
/denoland/deno/security/advisories/GHSA-23rx-c3g5-hv9w
web, vendor-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2024-34346
advisory, web
-
github.com
/denoland/deno
package
-
github.com
/advisories/GHSA-23rx-c3g5-hv9w
web
Sources
- CVE List CVE-2024-34346
- GitHub Advisory GHSA-23rx-c3g5-hv9w
- NVD CVE-2024-34346
- OSV JLSEC-2026-107
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.