CVE-2026-34993
AIOHTTP Vulnerable to Deserialization of Untrusted Data
At a glance
- Severity
- MEDIUM 6.4
- EPSS
- EPSS 0.18 % · percentile 7 (2026-10-27)
- State
- PUBLISHED
- Published
- Updated
- Assigner
- GitHub_M
- NVD status
- Modified
Description
AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to version 3.14.0, using ``CookieJar.load()`` with untrusted input may allow arbitrary code execution. Most applications using this function will be doing so with the user's own data, so this is unlikely to affect many applications. Version 3.14.0 patches the issue. If an application does allow attacker controlled files to be loaded, a workaround on older releases would be to sanitize the files before loading.
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | MEDIUM 6.4 | CVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:C/C:L/I:H/A:L | GitHub_M |
| CVSS 3.1 | HIGH 7.2 | CVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:H | redhat-SADP |
| CVSS 3.1 | MEDIUM 6.4 | CVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:C/C:L/I:H/A:L | NVD · security-advisories@github.com (Secondary) |
| CVSS 3.1 | HIGH 7.3 | CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H | NVD · nvd@nist.gov (Primary) |
| CVSS 3.1 | HIGH 7.2 | CVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:H | NVD · 0b0ca135-0b70-47e7-9f44-1890c2a1c46c (Secondary) |
Weaknesses (CWE)
Advisories
- GHSA-jg22-mg44-37j8 — AIOHTTP is Vulnerable to Deserialization of Untrusted Data
- PYSEC-2026-2104 — AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to version 3.14.0, using ``CookieJar.load()`` with untrusted input may all
European references
- ENISA EUVD · EUVD-2026-34001
- GCVE · GCVE-0-2026-34993
CERT-FR advisories
- CERTFR-2026-AVI-1385 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1094 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0933 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr
Affected configurations (NVD CPE)
cpe:2.3:a:aiohttp:aiohttp:*:*:*:*:*:*:*:*< 3.14.0
Affected products
| Product | Versions |
|---|---|
| aio-libs · aiohttp | affected < 3.14.0 |
References
- https://github.com/aio-libs/aiohttp/security/advisories/GHSA-jg22-mg44-37j8
- https://github.com/aio-libs/aiohttp/commit/dcf40f30637e8752c76781cf6703b5a236749a00
- https://access.redhat.com/security/cve/CVE-2026-34993
- https://bugzilla.redhat.com/show_bug.cgi?id=2484099
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-34993.json
- https://access.redhat.com/errata/RHSA-2026:59135
- https://access.redhat.com/errata/RHSA-2026:50319
- https://access.redhat.com/errata/RHSA-2026:63327
- https://access.redhat.com/errata/RHSA-2026:59136
- https://access.redhat.com/errata/RHSA-2026:50336
- https://access.redhat.com/errata/RHSA-2026:63387
- https://access.redhat.com/errata/RHSA-2026:63386
- https://access.redhat.com/errata/RHSA-2026:63385
- https://access.redhat.com/errata/RHSA-2026:59518
- https://access.redhat.com/errata/RHSA-2026:50357
- https://access.redhat.com/errata/RHSA-2026:50479
- https://access.redhat.com/errata/RHSA-2026:50340
- https://access.redhat.com/errata/RHSA-2026:54760
- https://access.redhat.com/errata/RHSA-2026:62336
- https://access.redhat.com/errata/RHSA-2026:62335
- https://access.redhat.com/errata/RHSA-2026:43038
- https://access.redhat.com/errata/RHSA-2026:42644
- https://access.redhat.com/errata/RHSA-2026:24977
- https://access.redhat.com/errata/RHSA-2026:37275
- https://access.redhat.com/errata/RHSA-2026:60520
- https://access.redhat.com/errata/RHSA-2026:34456
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |