Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2023-09-15. NVD baseline CVSS 7.5; sources differ by 0.0.
A fix is available — apply it.
When curl retrieves an HTTP response, it stores the incoming headers so that they can be accessed later via the libcurl headers API.
However, curl did not have a limit in how many or how large headers it would accept in a response, allowing a malicious server to stream an endless series of headers and eventually cause curl to run out of heap memory.
September 15, 2023
December 2, 2025
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
| Vendor / Ecosystem | Fixed in / Patch | Released | Source |
|---|---|---|---|
| ubuntu | libcurl4-openssl-dev (7.88.1-8ubuntu2.2) @ lunar | 2026-05-24 | ubuntu |
| redhat | jbcs-httpd24-curl-0:8.4.0-2.el7jbcs | 2023-12-07 | redhat |
| redhat | jbcs-httpd24-curl | 2023-12-07 | redhat |
Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.
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.
msrc · redhat
CWE-770
Explore the affected products and dependency analysis for CVE-2023-38039
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