GHSA-63hw-fmq6-xxg2

Suggest an improvement
Source
https://github.com/advisories/GHSA-63hw-fmq6-xxg2
Import Source
https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/06/GHSA-63hw-fmq6-xxg2/GHSA-63hw-fmq6-xxg2.json
JSON Data
https://api.osv.dev/v1/vulns/GHSA-63hw-fmq6-xxg2
Aliases
  • CVE-2026-54277
Downstream
Related
Published
2026-06-15T20:09:16Z
Modified
2026-06-16T18:59:14.472739872Z
Severity
  • 6.6 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U CVSS Calculator
Summary
aiohttp: C HTTP Parser Bypasses max_line_size for Fragmented Lines
Details

Summary

It is possible to bypass the maxlinesize check in parts of an HTTP request in the C parser.

Impact

If using the optimised C parser (the default in pre-built wheels), then an attacker may be able to send oversized lines through the HTTP parser and use an excessive amount of memory, potentially leading to DoS.

Patch: https://github.com/aio-libs/aiohttp/commit/5ab61bb4cd88f19b712f12c7c9295fe262bf804d

Database specific 
{
    "github_reviewed": true,
    "github_reviewed_at": "2026-06-15T20:09:16Z",
    "nvd_published_at": null,
    "severity": "MODERATE",
    "cwe_ids": [
        "CWE-770"
    ]
}
References

Affected packages

PyPI / aiohttp

Package

Name
aiohttp
View open source insights on deps.dev
Purl
pkg:pypi/aiohttp

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
3.14.1

Affected versions

0.*
0.1
0.2
0.3
0.4
0.4.1
0.4.2
0.4.3
0.4.4
0.5.0
0.6.0
0.6.1
0.6.2
0.6.3
0.6.4
0.6.5
0.7.0
0.7.1
0.7.2
0.7.3
0.8.0
0.8.1
0.8.2
0.8.3
0.8.4
0.9.0
0.9.1
0.9.2
0.9.3
0.10.0
0.10.1
0.10.2
0.11.0
0.12.0
0.13.0
0.13.1
0.14.0
0.14.1
0.14.2
0.14.3
0.14.4
0.15.0
0.15.1
0.15.2
0.15.3
0.16.0
0.16.1
0.16.2
0.16.3
0.16.4
0.16.5
0.16.6
0.17.0
0.17.1
0.17.2
0.17.3
0.17.4
0.18.0
0.18.1
0.18.2
0.18.3
0.18.4
0.19.0
0.20.0
0.20.1
0.20.2
0.21.0
0.21.1
0.21.2
0.21.4
0.21.5
0.21.6
0.22.0a0
0.22.0b0
0.22.0b1
0.22.0b2
0.22.0b3
0.22.0b4
0.22.0b5
0.22.0b6
0.22.0
0.22.1
0.22.2
0.22.3
0.22.4
0.22.5
1.*
1.0.0
1.0.1
1.0.2
1.0.3
1.0.5
1.1.0
1.1.1
1.1.2
1.1.3
1.1.4
1.1.5
1.1.6
1.2.0
1.3.0
1.3.1
1.3.2
1.3.3
1.3.4
1.3.5
2.*
2.0.0rc1
2.0.0
2.0.1
2.0.2
2.0.3
2.0.4
2.0.5
2.0.6
2.0.7
2.1.0
2.2.0
2.2.1
2.2.2
2.2.3
2.2.4
2.2.5
2.3.0a1
2.3.0a2
2.3.0a3
2.3.0a4
2.3.0
2.3.1a1
2.3.1
2.3.2b2
2.3.2b3
2.3.2
2.3.3
2.3.4
2.3.5
2.3.6
2.3.7
2.3.8
2.3.9
2.3.10
3.*
3.0.0b0
3.0.0b1
3.0.0b2
3.0.0b3
3.0.0b4
3.0.0
3.0.1
3.0.2
3.0.3
3.0.4
3.0.5
3.0.6
3.0.7
3.0.8
3.0.9
3.1.0
3.1.1
3.1.2
3.1.3
3.2.0
3.2.1
3.3.0a0
3.3.0
3.3.1
3.3.2a0
3.3.2
3.4.0a0
3.4.0a3
3.4.0b1
3.4.0b2
3.4.0
3.4.1
3.4.2
3.4.3
3.4.4
3.5.0a1
3.5.0b1
3.5.0b2
3.5.0b3
3.5.0
3.5.1
3.5.2
3.5.3
3.5.4
3.6.0a0
3.6.0a1
3.6.0a2
3.6.0a3
3.6.0a4
3.6.0a5
3.6.0a6
3.6.0a7
3.6.0a8
3.6.0a9
3.6.0a11
3.6.0a12
3.6.0b0
3.6.0
3.6.1b3
3.6.1b4
3.6.1
3.6.2a0
3.6.2a1
3.6.2a2
3.6.2
3.6.3
3.7.0b0
3.7.0b1
3.7.0
3.7.1
3.7.2
3.7.3
3.7.4
3.7.4.post0
3.8.0a7
3.8.0b0
3.8.0
3.8.1
3.8.2
3.8.3
3.8.4
3.8.5
3.8.6
3.9.0b0
3.9.0b1
3.9.0rc0
3.9.0
3.9.1
3.9.2
3.9.3
3.9.4rc0
3.9.4
3.9.5
3.10.0b1
3.10.0rc0
3.10.0
3.10.1
3.10.2
3.10.3
3.10.4
3.10.5
3.10.6rc0
3.10.6rc1
3.10.6rc2
3.10.6
3.10.7
3.10.8
3.10.9
3.10.10
3.10.11rc0
3.10.11
3.11.0b0
3.11.0b1
3.11.0b2
3.11.0b3
3.11.0b4
3.11.0b5
3.11.0rc0
3.11.0rc1
3.11.0rc2
3.11.0
3.11.1
3.11.2
3.11.3
3.11.4
3.11.5
3.11.6
3.11.7
3.11.8
3.11.9
3.11.10
3.11.11
3.11.12
3.11.13
3.11.14
3.11.15
3.11.16
3.11.17
3.11.18
3.12.0b0
3.12.0b1
3.12.0b2
3.12.0b3
3.12.0rc0
3.12.0rc1
3.12.0
3.12.1rc0
3.12.1
3.12.2
3.12.3
3.12.4
3.12.6
3.12.7rc0
3.12.7
3.12.8
3.12.9
3.12.10
3.12.11
3.12.12
3.12.13
3.12.14
3.12.15
3.13.0
3.13.1
3.13.2
3.13.3
3.13.4
3.13.5
3.14.0

Database specific

source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/06/GHSA-63hw-fmq6-xxg2/GHSA-63hw-fmq6-xxg2.json"
last_known_affected_version_range 
"<= 3.14.0"