Deno is a JavaScript, TypeScript, and WebAssembly runtime. Starting in version 1.35.1 and prior to version 1.36.3, a vulnerability in Deno's Node.js compatibility runtime allows for cross-session data contamination during simultaneous asynchronous reads from Node.js streams sourced from sockets or files. The issue arises from the re-use of a global buffer (BUF) in stream_wrap.ts used as a performance optimization to limit allocations during these asynchronous read operations. This can lead to data intended for one session being received by another session, potentially resulting in data corruption and unexpected behavior. This affects all users of Deno that use the node.js compatibility layer for network communication or other streams, including packages that may require node.js libraries indirectly. Version 1.36.3 contains a patch for this issue.
CVE-2024-27935
This high-severity CVE scores 7.2 under NVD CVSS v3. EPSS exploit probability: 0.4%, top 39% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).
- High severity, but no confirmed exploitation yet
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 7.2
- EG Score
- 7.2(medium)
- EPSS
- 49.6%
- KEV
- Not listed
Published
March 21, 2024
Last Modified
January 3, 2025
References (6)
- security-advisories@githubhttps://github.com/denoland/deno/commit/3e9fb8aafd9834ebacd27734cea4310caaf794c6
- security-advisories@githubhttps://github.com/denoland/deno/issues/20188
- security-advisories@githubhttps://github.com/denoland/deno/security/advisories/GHSA-wrqv-pf6j-mqjp
- af854a3a-2127-422b-91ae-364da2661108https://github.com/denoland/deno/commit/3e9fb8aafd9834ebacd27734cea4310caaf794c6
- af854a3a-2127-422b-91ae-364da2661108https://github.com/denoland/deno/issues/20188
- af854a3a-2127-422b-91ae-364da2661108https://github.com/denoland/deno/security/advisories/GHSA-wrqv-pf6j-mqjp
Affected Packages
(1 across 1 ecosystem)
crates.io(1)
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| deno | — | 1.36.3 | — |
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 10× in last 7d / 49× in last 30d)
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
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Frequently asked(5)
What is CVE-2024-27935?
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Dependency Blast Radius
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