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CVE-2026-92391high7.5

curl_mime_free stack overflow by recursion

Impact

A deeply nested multipart MIME structure constructed via the public API causes a stack overflow in libcurl during normal cleanup operations. An excessive recursion depth within curl_mime_free leads to unbounded stack frame allocation during structure traversal, ultimately crashing the host process.

Source excerpt · curl

Affected packages

This source has no supported package-version data for matching. You can read the advisory here, but this record alone cannot power a dependency check.

Affected products

Vendor version evidence. Product records are separate from automatic dependency matching.

curl · curl

curl

78 ranges
curl version evidence

Compare with this publisher’s ranges. This does not inspect your installation.

affected

8.22.0 → through 8.22.0

semver versions

8.21.0 → through 8.21.0

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8.20.0 → through 8.20.0

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8.19.0 → through 8.19.0

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8.14.1 → through 8.14.1

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7.56.1 → through 7.56.1

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7.56.0 → through 7.56.0

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unaffected

unknown

Other versions: unaffected

Original source description

A deeply nested multipart MIME structure constructed via the public API causes a stack overflow in libcurl during normal cleanup operations. An excessive recursion depth within curl_mime_free leads to unbounded stack frame allocation during structure traversal, ultimately crashing the host process.

Inside the record

Evidence available

Package identity · not supplied
Version evidence
Remediation guidance · not supplied
Weakness classification
Additional publishers

Describes the evidence in this view, not whether the product is safe.

Original records

CVE-2026-92391

View the latest unmodified CVE JSON from the official source. It may be newer than this imported page.

cve.new JSON →

Underlying weaknesses

The source’s classification of what caused the vulnerability.

CWE-674 ↗

CWE-674 Uncontrolled Recursion

CISA-ADP

Related →
Contributing organizations · 2
curl

Assigning organization

2026-10-20
CISA-ADP

Additional data publisher

2026-10-30

What changed

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Large field values are marked as truncated previews. Original source snapshots remain retained.

References

3 sources
curl.se/docs/CVE-2026-92391.json
Security advisorycurl
curl.se/docs/CVE-2026-92391.html
Security advisorycurl
hackerone.com/reports/4024222
exploitcurl · CISA-ADP