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CVE.org (no NVD analysis yet)· CNA curl

CVE-2026-92392: HTTP/2 upload Use-After-Free

Noroxi assessment

Priority: Monitor (action score 32/100)

  • Public proof-of-concept code exists (GitHub); there is no record of exploitation in the wild.
  • Probability of exploitation in the next 30 days: 1.2% (FIRST EPSS); higher than 70.2% of all records.
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. Special conditions such as timing or configuration are required.
  • Fixed version: azl3 mysql 8.0.46-2 on Azure Linux 3.0 Release Notes; azl3 rust 1.75.0-31 on Azure Linux 3.0 Release Notes; azl3 rust 1.96.1-2 on Azure Linux 3.0 Release Notes.

Low priority for now. Upgrade to azl3 mysql 8.0.46-2 on Azure Linux 3.0 Release Notes; azl3 rust 1.75.0-31 on Azure Linux 3.0 Release Notes; azl3 rust 1.96.1-2 on Azure Linux 3.0 Release Notes or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

During an upload, curl mishandles HTTP/2 `RST_STREAM` received from the server (with reason `HTTP_1_1_REQUIRED` or `REFUSED_STREAM`) leading to a use after free of a `struct Curl_easy` object.

HighCVSS 8.1 · v3.1—Proof of concept Fix available
Published
Oct 14, 2026
Updated
Oct 20, 2026
EPSS
1.2% · 70th percentile

Report tools

JSON

Action score

32

Monitor

Low priority for now.

CVSS
32 / 40 · 8.1 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 1.2%

CISA SSVC decision

Exploitation
proof of concept
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • Proof of concept exists, no weaponized module
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2026-92392

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

—

Versions reported by the vendor

Affected version ranges reported by the assigning authority (curl). Independent of NVD's CPE analysis and usually ahead of it.

  • curl curl

    • 8.22.0 and later · up to and including 8.22.0affected · semver
    • 8.21.0 and later · up to and including 8.21.0affected · semver
    • 8.20.0 and later · up to and including 8.20.0affected · semver
    • 8.19.0 and later · up to and including 8.19.0affected · semver
    • 8.18.0 and later · up to and including 8.18.0affected · semver
    • 8.17.0 and later · up to and including 8.17.0affected · semver
    • 8.16.0 and later · up to and including 8.16.0affected · semver
    • 8.15.0 and later · up to and including 8.15.0affected · semver
    • 8.14.1 and later · up to and including 8.14.1affected · semver
    • 8.14.0 and later · up to and including 8.14.0affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Alpine:v3.21curlbefore 8.14.1-r38.14.1-r3
Alpine:v3.22curlbefore 8.14.1-r48.14.1-r4
Alpine:v3.23curlbefore 8.23.0-r08.23.0-r0
Debian:13curlbefore 8.14.1-2+deb13u78.14.1-2+deb13u7
Debian:14curlfrom 0—
Red Hat:hummingbird:1cargobefore 0:1.99.0-1.hum10:1.99.0-1.hum1
Red Hat:hummingbird:1clippybefore 0:1.99.0-1.hum10:1.99.0-1.hum1
Red Hat:hummingbird:1rustbefore 0:1.99.0-1.hum10:1.99.0-1.hum1
Red Hat:hummingbird:1rust-analyzerbefore 0:1.99.0-1.hum10:1.99.0-1.hum1
Red Hat:hummingbird:1rust-debugger-commonbefore 0:1.99.0-1.hum10:1.99.0-1.hum1
Red Hat:hummingbird:1rust-docbefore 0:1.99.0-1.hum10:1.99.0-1.hum1
Red Hat:hummingbird:1rust-gdbbefore 0:1.99.0-1.hum10:1.99.0-1.hum1
Red Hat:hummingbird:1rust-lldbbefore 0:1.99.0-1.hum10:1.99.0-1.hum1
Red Hat:hummingbird:1rust-srcbefore 0:1.99.0-1.hum10:1.99.0-1.hum1
Red Hat:hummingbird:1rust-std-staticbefore 0:1.99.0-1.hum10:1.99.0-1.hum1
Red Hat:hummingbird:1rust-std-static-aarch64-unknown-none-softfloatbefore 0:1.99.0-1.hum10:1.99.0-1.hum1
Red Hat:hummingbird:1rust-std-static-aarch64-unknown-uefibefore 0:1.99.0-1.hum10:1.99.0-1.hum1
Red Hat:hummingbird:1rust-std-static-i686-pc-windows-gnubefore 0:1.99.0-1.hum10:1.99.0-1.hum1
Red Hat:hummingbird:1rust-std-static-wasm32-unknown-unknownbefore 0:1.99.0-1.hum10:1.99.0-1.hum1
Red Hat:hummingbird:1rust-std-static-wasm32-wasip1before 0:1.99.0-1.hum10:1.99.0-1.hum1
Red Hat:hummingbird:1rust-std-static-x86_64-pc-windows-gnubefore 0:1.99.0-1.hum10:1.99.0-1.hum1
Red Hat:hummingbird:1rust-std-static-x86_64-unknown-nonebefore 0:1.99.0-1.hum10:1.99.0-1.hum1
Red Hat:hummingbird:1rust-std-static-x86_64-unknown-uefibefore 0:1.99.0-1.hum10:1.99.0-1.hum1
Red Hat:hummingbird:1rustfmtbefore 0:1.99.0-1.hum10:1.99.0-1.hum1

+1

Same product

curl: all records

Other highest-scoring records for the same primary product.

Published before and after this one in the same product

  • ← EarlierCVE-2010-3842Oct 27, 2010 · Absolute path traversal vulnerability in curl 7.20.0 through 7.21.1, when the --remote-header-name or -J option is used, allows remote serve
    24Monitor
  • ← EarlierCVE-2012-0036Apr 13, 2012 · curl and libcurl 7.2x before 7.24.0 do not properly consider special characters during extraction of a pathname from a URL, which allows rem
    35Monitor
  • Later →CVE-2026-86409Oct 20, 2026 · stale SigV4 headers sent unintended
    32Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
azl3 mysql 8.0.46-2 on Azure Linux 3.0Release NotesMicrosoft (MSRC)
azl3 rust 1.75.0-31 on Azure Linux 3.0Release NotesMicrosoft (MSRC)
azl3 rust 1.96.1-2 on Azure Linux 3.0Release NotesMicrosoft (MSRC)
alpine:curl8.14.1-r3 · Alpine:v3.21Package registry (OSV)
debian:curl8.14.1-2+deb13u7 · Debian:13Package registry (OSV)
red hat:cargo0:1.99.0-1.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:clippy0:1.99.0-1.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:rust0:1.99.0-1.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:rust-analyzer0:1.99.0-1.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:rust-debugger-common0:1.99.0-1.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:rust-doc0:1.99.0-1.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:rust-gdb0:1.99.0-1.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:rust-lldb0:1.99.0-1.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:rust-src0:1.99.0-1.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:rust-std-static0:1.99.0-1.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:rust-std-static-aarch64-unknown-none-softfloat0:1.99.0-1.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:rust-std-static-aarch64-unknown-uefi0:1.99.0-1.hum1 · Red Hat:hummingbird:1Package registry (OSV)
suse:curl8.14.1-150400.5.98.1 · SUSE:Linux Enterprise Installer Updates 15 SP4Package registry (OSV)

Exploit status

Proof of concept available

A public proof of concept or detection signature exists. Exploit knowledge is out there; don't delay patching.

Evidence

  • Proof-of-concept repository on GitHub ×1

Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.

Public exploit evidence
SourceKindDate
Proof-of-concept repository on GitHubstars:02026-10-14

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

  1. First PoCsame day
  2. Published
  3. Fix recorded+1 d
  4. TodayNov 7, 2026+24 d
EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

The product’s vendor appears in a public program. Matched by name; verify the scope text in the program.

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • Special conditions such as timing or configuration are required.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Network
Attack complexity
High
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-416 · Use After Free

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

nvd-secondary

Root cause

After a memory region is freed, another reference pointing to it is still used. By then, the same region may have been allocated for different data.

The bug in code

The whole CWE-416 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

c
free(dev->buf);/* ... another thread is still running ... */process(dev->buf);

Fixed

c
lock(&dev->lock);free(dev->buf);dev->buf = NULL;unlock(&dev->lock);

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. CVSS— → 8.1
  2. Severity— → high
  3. SSVC exploitation— → poc
  4. Exploit maturitynone → poc
  5. Fix✗ → ✓
  6. Exploit maturity— → none

For records you follow, these changes also arrive as notifications. →

References

Show all references (4 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records