CVE-2025-69225: aio-libs aiohttp HTTP Request/Response Smuggling
CVSS: 5.3v3.1MediumAnalyzed
AliasesGHSA-mqqc-3gqh-h2x8PYSEC-2026-1109UBUNTU-CVE-2025-69225DEBIAN-CVE-2025-69225CGA-3876-q8g2-5mrjCGA-4w9j-xm36-3gchCGA-74vx-9rh8-j64hCGA-76q5-x7fc-6cqpCGA-7h7p-7487-gqfcCGA-7pg3-q925-fwc2CGA-82w9-jvr7-24fpCGA-89vw-6hxf-gxc8CGA-8r7q-p9xc-m9wvCGA-9cf8-cvp8-pc86CGA-9jcx-cpf2-3jqcCGA-g544-phfj-73cfCGA-j7cc-h24h-jjrqCGA-j95w-rfwq-7hjvCGA-pgm6-p4jp-hch8CGA-qxpc-8pf9-3w79CGA-w42w-ww9p-4q7mCGA-wj4v-grjw-6x88CGA-2p6j-2944-wcqcCGA-3c86-m3m4-h985CGA-3cpm-jvr8-vr59CGA-562q-2gf6-5w5cCGA-6xwq-528j-c22mCGA-8h2j-2527-vw5hCGA-8x7v-m2pc-m4vvCGA-9g3x-9f9f-g9rfCGA-cccc-wwf4-c76gCGA-cxff-6cfh-qgmvCGA-f24w-96v4-452hCGA-f2jm-v357-gcfwCGA-f942-4hjr-w98hCGA-ghqc-69xp-gr8jCGA-jhj6-mv64-24vmCGA-pggf-g9r3-cpg7CGA-q4jg-rmqv-4xq3CGA-qpgh-7677-xgqxCGA-v62m-29f3-4xgvCGA-vwff-r434-7w6vCGA-wcj4-m844-r2qc
Published 05-01-2026Last modified 06-01-2026
Vulnerability summary
CVE-2025-69225 is a medium (CVSS 5.3) HTTP Request/Response Smuggling vulnerability in aio-libs aiohttp. EPSS estimates a 0.28% chance of exploitation in the next 30 days, higher than 19.4% of scored vulnerabilities.
CVSS score
5.3/10
010
Medium · v3.1 (NVD)EPSS score
0.28%
0%100%
Low · +0.01 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Advisory lineage
Upstream 0 · Downstream 5 · Related 7Timeline
- 05-01-2026PublishedVulnerability first disclosed.
- 06-01-2026Last modifiedVulnerability information updated.
Description
AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Versions 3.13.2 and below contain parser logic which allows non-ASCII decimals to be present in the Range header. There is no known impact, but there is the possibility that there's a method to exploit a request smuggling vulnerability. This issue is fixed in version 3.13.3.
CVSS metrics
9 scores · 7 sources · 2 versionsLow 2.7Preferred score · CVE.org (CNA)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:USources6 sources · 2.7–6.9
- OSV · PypiEcosystem advisory · calculated6.9MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:UDiffers
- OSV · UbuntuEcosystem advisory · calculated6.9MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:UDiffers
- OSV · WolfiEcosystem advisory · calculated6.9MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:UDiffers
- OSV · ChainguardEcosystem advisory · calculated6.9MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:UDiffers
- NVDNIST2.7LowCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/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
Medium 5.3Preferred score · NVD (NIST)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:NSourcesAll 3 agree
- OSV · UbuntuEcosystem advisory · calculated5.3MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
- OSV · DebianEcosystem advisory · calculated5.3MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
EPSS trend
Probability
0.28%
Chance of exploitation in the next 30 days
Percentile
19%
Versus all other CVEs
30-day change
+0.01 pp
From 0.28% on 19-09-2026
19-09-202619-10-2026
EPSS score0.28%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Chainguard22 products
- airflow-2< 2.11.0-r19
- airflow-2-bitnami-compat< 2.11.0-r19
- airflow-2-compat< 2.11.0-r19
- airflow-2-iamguarded-compat< 2.11.0-r19
- airflow-3< 3.2.0-r0 | < 3.1.5-r2
Wolfi9 products
- airflow-3< 3.2.0-r0 | < 3.1.5-r2
- airflow-3-bitnami-compatAll versions (No fix recorded)
- checkov< 3.2.499-r0
- dask-kubernetes< 2025.7.0-r4
- kserve-storage-controller< 0.17.0-r2
Aio-libs1 product
- aiohttp< 3.13.3
Aiohttp1 product
- aiohttp< 3.13.3
Debian1 product
- python-aiohttpAll versions (No fix recorded) | < 3.11.16-1+deb13u1 | < 3.13.3-1
PyPI1 product
- aiohttp< 3.13.3
Ubuntu1 product
- python-aiohttp< 3.0.1-1ubuntu0.1~esm6 | < 3.8.1-4ubuntu0.2+esm2 | < 3.9.1-1ubuntu0.1+esm2 | < 3.11.16-1ubuntu0.1
7 vendors · 36 products
References
11 links- github.com/aio-libs/aiohttp/security/advisories/GHSA-mqqc-3gqh-h2x8X Refsource CONFIRMWEBREPORTAdvisoryPatchVendor Advisory
- github.com/aio-libs/aiohttp/commit/c7b7a044f88c71cefda95ec75cdcfaa4792b3b96X Refsource MISCWEBFIXREPORTPatch
- github.com/aio-libs/aiohttpPACKAGE
- pypi.org/project/aiohttpPACKAGE
