CVE-2026-54276

MEDIUMNVD 6.16.1
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to NVD's CVSS score.

This medium-severity CVE scores 6.1 under NVD CVSS v3. EPSS exploit probability: 0.3% (21st percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from NVD CVSS v3
Sources: EPSS, NVD CVSS v3
6.1EG
EchelonGraph verdictMonitorRemediate within your standard update timelines (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 6.1Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to 3.14.1, DigestAuthMiddleware can send an authentication response after following a cross-origin redirect. This likely requires an open redirect vulnerability or similar on the target domain for an attacker to be able to execute. Further, the attacker is only receiving the digest, so should only be able to extract the user's credentials if the cryptography is weak or there is some kind of password reuse. This vulnerability is fixed in 3.14.1.

CVSS v3
6.1
EG Score
6.1MEDIUMmedium confidence
EG Risk
28
EG Risk 28/100

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed (value × EchelonGraph’s weight)
Severity61% × 45%
The EG Score, 6.1 of 10.
Exploitation0.3% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at every mission impact level.
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.3%
EPSS %ILE
21st
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at every mission impact level.

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

June 15, 2026

Last Modified

September 17, 2026

Advisory Details (2)

Auto-updated Jun 23, 2026
Patch available. Sources: github_commit, github.
GitHub advisoryMentions a patch (unverified)

DigestAuthMiddleware Applies Credentials to Cross-Origin Redirect Challenges · Advisory · aio-libs/aiohttp · GitHub

https://github.com/aio-libs/aiohttp/security/advisories/GHSA-hpj7-wq8m-9hgp
GitHub commit

commit 38d16060037e (aio-libs/aiohttp)

Fix landed in aio-libs/aiohttp commit 38d16060037e — awaiting tagged release

https://github.com/aio-libs/aiohttp/commit/38d16060037e1bfcd6d677abababa3c2a4bb58fa

Vendor Advisories for CVE-2026-54276(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(2 across 2 ecosystems)
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
python-aiohttp3.11.16-1 ... 3.14.0-1 (9 versions)
  • every version up to 3.14.1-1: fixed in 3.14.1-1
—
PyPI(1)
PackageVulnerable rangeFix by version rangeDependents
aiohttp0.1 ... 3.9.5 (307 versions)
  • every version up to 3.14.1: fixed in 3.14.1
—

Weakness Classification(3)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 11× in last 7d / 32× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 100 of 151 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 51 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-16 16:42 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  2. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  3. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  4. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  5. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  6. 2026-10-12 15:56 UTCEG score recompute
  7. 2026-10-11 19:39 UTCEG score recompute
  8. 2026-10-11 16:55 UTCEG score recompute
  9. 2026-10-11 14:18 UTCEG score recompute
  10. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  11. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  12. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  13. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  14. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  15. 2026-10-07 12:05 UTCOSV refresh
  16. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  17. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  18. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  19. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  20. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  21. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  22. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  23. 2026-09-29 15:22 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  24. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  25. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.3% · 21st percentile
Show 75 more
  1. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  2. 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  3. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  4. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  5. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  6. 2026-09-17 19:31 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  7. 2026-09-17 18:17 UTCEG score recompute
  8. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  9. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  10. 2026-09-14 03:41 UTCEG score recompute
  11. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  12. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  13. 2026-09-10 09:35 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  14. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  15. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  16. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  17. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  18. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  19. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  20. 2026-09-01 04:40 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  21. 2026-08-30 22:58 UTCEG score recompute
  22. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  23. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  24. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  25. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  26. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  27. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  28. 2026-08-24 23:33 UTCEG score recompute
  29. 2026-08-23 09:44 UTCEG score recompute
  30. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  31. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  32. 2026-08-20 16:21 UTCEG score recompute
  33. 2026-08-19 17:04 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  34. 2026-08-19 13:14 UTCEG score recompute
  35. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  36. 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  37. 2026-08-16 23:32 UTCEG score recompute
  38. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  39. 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  40. 2026-08-15 23:12 UTCEG score recompute
  41. 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  42. 2026-08-13 22:22 UTCEG score recompute
  43. 2026-08-13 22:00 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  44. 2026-08-12 22:02 UTCEG score recompute
  45. 2026-08-12 13:51 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  46. 2026-08-11 21:42 UTCEG score recompute
  47. 2026-08-11 00:00 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  48. 2026-08-09 21:02 UTCEG score recompute
  49. 2026-08-09 13:46 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  50. 2026-08-08 20:42 UTCEG score recompute
  51. 2026-08-08 16:37 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  52. 2026-08-07 20:21 UTCEG score recompute
  53. 2026-08-06 20:01 UTCEG score recompute
  54. 2026-08-06 13:47 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  55. 2026-08-05 19:41 UTCEG score recompute
  56. 2026-08-05 19:17 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  57. 2026-08-04 15:42 UTCEG score recompute
  58. 2026-08-04 15:10 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  59. 2026-08-04 10:39 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  60. 2026-08-03 10:36 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  61. 2026-08-02 09:10 UTCEG score recompute
  62. 2026-08-02 02:27 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  63. 2026-08-01 08:50 UTCEG score recompute
  64. 2026-08-01 04:16 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  65. 2026-07-31 05:32 UTCEG score recompute
  66. 2026-07-30 16:28 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  67. 2026-07-30 05:11 UTCEG score recompute
  68. 2026-07-30 01:30 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  69. 2026-07-29 03:24 UTCEG score recompute
  70. 2026-07-28 15:37 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  71. 2026-07-28 01:53 UTCEG score recompute
  72. 2026-07-26 20:12 UTCEG score recompute
  73. 2026-07-26 14:54 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  74. 2026-07-25 14:18 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  75. 2026-07-24 14:18 UTCEPSS rescoreEPSS 0.2% · 7th percentile

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2026-54276?
CVE-2026-54276 is a medium-severity vulnerability; its CVE record was published on June 15, 2026. AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to 3.14.1, DigestAuthMiddleware can send an authentication response after following a cross-origin redirect. This likely requires an open redirect vulnerability or similar on the target domain for an attacker to…
When was the CVE record for CVE-2026-54276 published?
The CVE record for CVE-2026-54276 was published on June 15, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of September 17, 2026; the record at its source may have been updated since.
Is CVE-2026-54276 actively exploited?
CVE-2026-54276 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (21st percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-54276?
CVE-2026-54276 has a CVSS v3 base score of 6.1 (NVD).
How do I remediate CVE-2026-54276?
A fix for CVE-2026-54276 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-54276 are linked in the Vendor Advisories panel on this page.

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