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NVD / CVE Program· CNA GitHub_M

CVE-2026-54280: AIOHTTP: Payload Response Resources Are Not Closed After Mid-Body Disconnect

LowCVSS 1.7 · v4.0—No exploit Fix available

Noroxi assessment

Priority: Monitor (action score 6/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.46% (FIRST EPSS).
  • 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: aio-libs aiohttp 3.14.1.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to aio-libs aiohttp 3.14.1 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

AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to 3.14.1, payload resources are not closed correctly when a client disconnects in the middle of a write. If a payload is using an open file or similar limited resource, then an attacker may be able to cause resource starvation temporarily until garbage collection or similar closes the file. This vulnerability is fixed in 3.14.1.

Published
Jun 22, 2026
Updated
Oct 25, 2026
EPSS
0.4% · 40th percentile

Report tools

JSON

Action score

6

Monitor

Low priority for now.

CVSS
6 / 40 · 1.7 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.4%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · GitHub_M
1.7
NVD has not scored this yet; the score shown is the CNA’s.

CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

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

Follow CVE-2026-54280

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.

VendorProduct
aiohttpaiohttp

Versions reported by the vendor

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

  • aio-libs aiohttp

    • < 3.14.1affected

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • aiohttp aiohttp3.12.1 and later · before 3.14.1

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12python-aiohttpbefore 3.8.4-1+deb12u23.8.4-1+deb12u2
Debian:13python-aiohttpfrom 0—
Debian:14python-aiohttpbefore 3.14.1-13.14.1-1
openSUSE:Leap 16.0python-aiohttpbefore 3.11.16-160000.6.13.11.16-160000.6.1
PyPIaiohttpbefore 3.14.13.14.1
SUSE:Linux Enterprise Module for Public Cloud 15 SP4python-aiohttpbefore 3.9.3-150400.10.43.13.9.3-150400.10.43.1
SUSE:Linux Enterprise Module for Public Cloud 15 SP4python-aiohttpbefore 3.6.0-150100.3.38.13.6.0-150100.3.38.1
SUSE:Linux Enterprise Server 16.0python-aiohttpbefore 3.11.16-160000.6.13.11.16-160000.6.1

Same product

aiohttp: all records

Other highest-scoring records for the same primary product.

  • CVE-2024-23334aiohttp.web.static(follow_symlinks=True) is vulnerable to directory traversal
    53Plan
  • CVE-2024-52303aiohttp memory leak when middleware is enabled when requesting a resource with a non-allowed method
    34Monitor
  • CVE-2025-69223AIOHTTP's HTTP Parser auto_decompress feature is vulnerable to zip bomb
    30Monitor

Published before and after this one in the same product

  • ← EarlierCVE-2026-54277Jun 22, 2026 · AIOHTTP: C HTTP Parser Bypasses max_line_size for Fragmented Lines
    26Monitor
  • ← EarlierCVE-2026-54278Jun 22, 2026 · AIOHTTP: Unread Compressed Request Bodies Bypass client_max_size During Cleanup
    26Monitor
  • ← EarlierCVE-2026-54279Jun 22, 2026 · AIOHTTP: Host-Only Cookies Become Domain Cookies After CookieJar Persistence
    5Monitor

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
aio-libs aiohttp3.14.1 · descriptionVendor (CNA)
debian:python-aiohttp3.14.1-1 · Debian:14Package registry (OSV)
debian:python-aiohttp3.8.4-1+deb12u2 · Debian:12Package registry (OSV)
opensuse:python-aiohttp3.11.16-160000.6.1 · openSUSE:Leap 16.0Package registry (OSV)
PyPI:aiohttp3.14.1Package registry (OSV)
suse:python-aiohttp3.11.16-160000.6.1 · SUSE:Linux Enterprise Server 16.0Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

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.

No dated events beyond publication.

Patch and commit links

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

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

All national notices →

Not on record for this CVE: EPSS history · researcher credit · variant or chain candidate · public bounty 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
Integrity
Availability
Attack vector
Network
Attack complexity
High
Privileges required
None
User interaction
None
Scope
X

Weakness class (CWE)

CWE-404 · Improper Resource Shutdown or Release

CVSS vector

CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

nvd-secondary

Attack context

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

References

Show all references (1 more)

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

All records