CVE-2026-54275: aio-libs aiohttp
CVSS: 7.5v3.1HighAnalyzed
AliasesGHSA-4m7w-qmgq-4wj5PYSEC-2026-237UBUNTU-CVE-2026-54275DEBIAN-CVE-2026-54275CGA-227f-crcq-jgghCGA-7gpw-pqvc-cvp3CGA-8984-6467-jmmjCGA-8w3j-x6m5-q989CGA-9mhf-mc94-h37cCGA-9r66-687w-pgrpCGA-ghc2-hg54-744xCGA-hvc3-pfqh-hcppCGA-pmp6-gpx4-c52cCGA-w537-48xp-qw8fCGA-2257-hj6h-h53gCGA-2g5r-pjfp-87qvCGA-36fj-hxv7-423hCGA-3hgg-fv2x-xjpjCGA-4c8g-87rg-h594CGA-4rxf-4prm-4hw6CGA-528j-hjrw-mwp4CGA-5426-964r-3q5fCGA-5hjw-g5xh-wg34CGA-5mx6-wfmp-qh27CGA-74xj-c4gm-4jffCGA-75pj-g85h-wh2pCGA-7mf2-fh54-xghpCGA-82g4-rm46-3xj8CGA-82p7-jfj8-9c63CGA-8g8v-w9px-fr2rCGA-9549-p93w-grgpCGA-995c-6phh-hv95CGA-9rp9-8ggp-72p6CGA-c723-jx4g-ff4qCGA-cg8f-c7w5-5894CGA-cqm3-jw8q-2xr4CGA-f37w-mrm2-hm4mCGA-g3rg-vmf3-fhq7CGA-h3vp-xvr7-5544CGA-h5hr-qr6j-3fm6CGA-h5vv-fj5f-8qq9CGA-h8h6-7fcp-r4xvCGA-hh79-89v2-h294CGA-j6f7-ph9f-6684CGA-jp8r-44jm-rvjjCGA-jv4p-rpp2-rcrcCGA-mgpj-93rj-7622CGA-ppwg-xqgv-j97rCGA-pvr2-xjjf-c8rjCGA-qq6g-vvwx-2f52CGA-r2qv-j5xf-gvpfCGA-r56v-7mcg-rxj4CGA-rfr5-9p9w-v8qhCGA-rg6r-ccx7-hwmmCGA-rj8p-v3w5-7f4vCGA-rmc8-2p97-568cCGA-v38x-2j4m-rhmpCGA-v5v2-7h4f-868cCGA-vq24-q8g8-2788CGA-w5c5-r6g2-x45jCGA-wmvj-8xff-wjcg
Published 22-06-2026Last modified 22-06-2026
Vulnerability summary
CVE-2026-54275 is a high (CVSS 7.5) vulnerability in aio-libs aiohttp. EPSS estimates a 0.47% chance of exploitation in the next 30 days, higher than 39.4% of scored vulnerabilities.
CVSS score
7.5/10
010
High · v3.1 (NVD)EPSS score
0.47%
0%100%
Low · +0.20 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 6Timeline
- 22-06-2026PublishedVulnerability first disclosed.
- 22-06-2026Last modifiedVulnerability information updated.
Description
AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to 3.14.1, the server_hostname TLS SNI check can be bypassed when an existing connection is reused. If an application makes multiple requests to the same domain, but with different per-request server_hostname parameters, then the later calls may succeed by reusing the existing connection when they should have been rejected due to the TLS SNI check. This vulnerability is fixed in 3.14.1.
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:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:USources5 sources · 2.7–6.9
- OSV · UbuntuEcosystem advisory · calculated6.9MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/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:L/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:L/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:L/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
High 7.5Preferred score · NVD (NIST)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HSourcesAll 4 agree
- OSV · PypiEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · UbuntuEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
0.47%
Chance of exploitation in the next 30 days
Percentile
39%
Versus all other CVEs
30-day change
+0.20 pp
From 0.27% on 20-09-2026
20-09-202620-10-2026
EPSS score0.47%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Chainguard31 products
- airflow-2All versions (No fix recorded)
- airflow-3< 3.2.2-r7 | < 3.3.1-r0
- airflow-3-iamguarded-compatAll versions (No fix recorded)
- airflow-core-2< 2.11.2-r6
- apache-beam-python-3.11-sdk< 2.74.0-r3
Wolfi4 products
- airflow-3< 3.2.2-r7 | < 3.3.1-r0
- airflow-3-iamguarded-compatAll versions (No fix recorded)
- mlflow< 3.16.0-r0 | < 3.13.0-r1
- open-webui< 0.9.6-r5
Aio-libs1 product
- aiohttp< 3.14.1
Aiohttp1 product
- aiohttp< 3.14.1
Debian1 product
- python-aiohttpAll versions (No fix recorded) | < 3.14.1-1
PyPI1 product
- aiohttp< 3.14.1
Ubuntu1 product
- python-aiohttpAll versions (No fix recorded)
7 vendors · 40 products
References
7 links- github.com/aio-libs/aiohttp/security/advisories/GHSA-4m7w-qmgq-4wj5X Refsource CONFIRMWEBAdvisoryREPORTThird Party Advisory
- github.com/aio-libs/aiohttpPACKAGE
