5.3

CVE-2024-38375: fastly js-compute-runtime Use After Free

CVSS: 5.3v3.1MediumDeferred
AliasesGHSA-mp3g-vpm9-9vqv
Published 26-06-2024Last modified 02-08-2024
Open JSON

Vulnerability summary

CVE-2024-38375 is a medium (CVSS 5.3) Use After Free vulnerability in fastly js-compute-runtime. EPSS estimates a 0.27% chance of exploitation in the next 30 days, higher than 17.4% of scored vulnerabilities.

Overall risk
21/100
0100
Low · default modelHow is this calculated?
CVSS score
5.3/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.27%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 26-06-2024
    PublishedVulnerability first disclosed.
  2. 02-08-2024
    Last modifiedVulnerability information updated.

Description

@fastly/js-compute is a JavaScript SDK and runtime for building Fastly Compute applications. The implementation of several functions were determined to include a use-after-free bug. This bug could allow for unintended data loss if the result of the preceding functions were sent anywhere else, and often results in a guest trap causing services to return a 500. This bug has been fixed in version 3.16.0 of the `@fastly/js-compute` package.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.27%

Chance of exploitation in the next 30 days

Percentile

17%

Versus all other CVEs

30-day change

0.00 pp

From 0.27% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.27%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

@fastly1 product
  • js-compute≥ 3.0.0, < 3.16.0
Fastly1 product

2 vendors · 2 products

References

4 links