Sanic is an opensource python web server/framework. In version 25.12.0, Sanic's core HTTP/1.1 chunked-body handling does not fully consume the trailer-part after the terminating zero chunk before reusing the keep-alive connection buffer. A remote unauthenticated client can place attacker-controlled bytes in that trailer region, causing Sanic to parse and route them as a hidden second request after the outer request. This breaks HTTP request-boundary integrity and can provide a request-smuggling primitive when Sanic is deployed behind intermediaries. This issue is fixed in version 25.12.1.
CVE-2026-85078
“—” beside the score: it is equal to the CVSS score beside it.
Score 6.5 from GitHub Security Advisory (severity: MODERATE) published 2026-09-17. A secondary CVSS source baseline 6.5; sources differ by 0.0.
Also known asEUVD-2026-81577 (ENISA EUVD) · GHSA-wmj6-g64g-j7q5 (GitHub Security Advisories) · PYSEC-2026-4162 (OSV.dev)Source: ENISA EUVD
- Lower severity and no public exploit yet
A fix is available — apply it.
- CVSS v3
- 6.5
- EG Score
- 6.5MEDIUMmedium confidence
- EG Risk
- 44EG Risk 44/100
EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.
How it’s computed (value × EchelonGraph’s weight)Severity65% × 45%Impact severity (EG Severity): CVSS 6.5 of 10. Never the KEV-floored or EPSS-lifted EG Score.Exploitation0.5% × 40%FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.Automatability100% × 15%CISA's SSVC Automatable value: yes (Vulnrichment).SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).Exploitation none (CISA Vulnrichment) · Automatable yes (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 at low or medium mission impact and sooner than that at high. - EPSS PROB
- 0.5%
- EPSS %ILE
- 43rd
- KEV
- Not listed
What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)
The EG score (6.5): severity, escalated by confirmed exploitation. This CVE's 6.5 is its impact severity (EG Severity), not escalated.
- EG Severity
- 6.5 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
- EG Likelihood
- 0.5% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-31). FIRST's exploitation probability, not an EchelonGraph model.
- Confirmed exploitation
- None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
- EG Priority
- SSVC Track at medium mission impactTrack at low or medium mission impact; Attend at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; 60 days if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.
SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Attend at high (mission-essential systems).
A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
Exploitation none (CISA Vulnrichment) · Automatable yes (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)14 days if the affected system is publicly exposed; 60 days if it is not.
The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable yes (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
September 17, 2026
Last Modified
September 30, 2026
Advisory Details (8)
Auto-updated Sep 17, 2026Version 25.12.1
Patch available: sanic-org/sanic v25.12.1
https://github.com/sanic-org/sanic/releases/tag/v25.12.1Version 24.12.1
Patch available: sanic-org/sanic v24.12.1
https://github.com/sanic-org/sanic/releases/tag/v24.12.1commit a332796506c7 (sanic-org/sanic)
Patch available: sanic-org/sanic v25.12.1 (contains commit a332796506c7)
https://github.com/sanic-org/sanic/commit/a332796506c7c588b6930b02a8886e43eb8ea8d6commit 69a10d3b06ba (sanic-org/sanic)
Fix landed in sanic-org/sanic commit 69a10d3b06ba — awaiting tagged release
https://github.com/sanic-org/sanic/commit/69a10d3b06babaa9e5f6d1af577364e9e53b6deacommit 47349d689d65 (sanic-org/sanic)
Patch available: sanic-org/sanic v24.12.1 (contains commit 47349d689d65)
https://github.com/sanic-org/sanic/commit/47349d689d65fa1907977ac100e867894aeafb22v24 LTS security patch
Patch available: sanic-org/sanic v24.12.1 (PR #3165 merged 2026-05-31)
https://github.com/sanic-org/sanic/pull/3165v25 LTS security patch
Patch available: sanic-org/sanic v25.12.1 (PR #3164 merged 2026-05-31)
https://github.com/sanic-org/sanic/pull/3164sanic chunked trailer request smuggling allows hidden second request execution · Advisory · sanic-org/sanic · GitHub
https://github.com/sanic-org/sanic/security/advisories/GHSA-wmj6-g64g-j7q5Vendor Advisories for CVE-2026-85078(1)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
Patch Availability(2)
| Vendor / Ecosystem | Fix (by version range) / Patch | Released | Source |
|---|---|---|---|
| pip | sanic @ 24.12.1 (fixes < 24.12.1) | — | ghsa |
| pip | sanic @ 25.12.1 (fixes >= 25.12.0, < 25.12.1) | — | ghsa |
Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.
Affected Packages
(1 across 1 ecosystem)
PyPI(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| sanic | 0.1.0 ... 25.12.0 (81 versions) |
| — |
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 10× in last 7d / 46× 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.
- 2026-11-02 16:46 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
- 2026-11-01 16:35 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
- 2026-11-01 07:38 UTCGHSA enrichmentGHSA-wmj6-g64g-j7q5 · GitHub severity MODERATE · GitHub CVSS 6.5
- 2026-11-01 07:38 UTCEG score recompute
- 2026-10-31 16:33 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
- 2026-10-30 16:35 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
- 2026-10-30 00:25 UTCOSV refresh
- 2026-10-29 16:34 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
- 2026-10-28 16:33 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
- 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
- 2026-10-26 16:32 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
- 2026-10-25 16:34 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
- 2026-10-25 13:55 UTCEG score recompute
- 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
- 2026-10-23 16:32 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
- 2026-10-22 16:35 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
- 2026-10-22 12:55 UTCEG score recompute
- 2026-10-21 16:34 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
- 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
- 2026-10-19 16:33 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
- 2026-10-18 16:33 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
- 2026-10-18 03:06 UTCEG score recompute
- 2026-10-17 16:35 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
- 2026-10-16 16:44 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
- 2026-10-15 16:33 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
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- 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
- 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.5% · 41st percentile
- 2026-10-12 16:35 UTCEPSS rescoreEPSS 0.5% · 41st percentile
- 2026-10-12 14:53 UTCEG score recompute
- 2026-10-11 19:18 UTCEG score recompute
- 2026-10-11 16:34 UTCEG score recompute
- 2026-10-11 13:52 UTCEG score recompute
- 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.5% · 41st percentile
- 2026-10-11 03:43 UTCEG score recompute
- 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.5% · 41st percentile
- 2026-10-10 00:33 UTCEG score recompute
- 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.5% · 41st percentile
- 2026-10-08 23:51 UTCEG score recompute
- 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.5% · 41st percentile
- 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.5% · 41st percentile
- 2026-10-06 22:27 UTCEG score recompute
- 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.5% · 41st percentile
- 2026-10-05 21:46 UTCEG score recompute
- 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.5% · 41st percentile
- 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.5% · 41st percentile
- 2026-10-03 20:15 UTCEG score recompute
- 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.5% · 41st percentile
- 2026-10-02 19:34 UTCEG score recompute
- 2026-10-02 17:57 UTCEPSS rescoreEPSS 0.5% · 41st percentile
- 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.5% · 41st percentile
- 2026-09-30 17:49 UTCEG score recompute
- 2026-09-30 15:04 UTCEPSS rescoreEPSS 0.5% · 41st percentile
- 2026-09-30 04:51 UTCEG score recompute
- 2026-09-29 04:10 UTCEG score recompute
- 2026-09-28 13:52 UTCEPSS rescoreEPSS 0.5% · 41st percentile
- 2026-09-28 03:28 UTCEG score recompute
- 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.5% · 41st percentile
- 2026-09-27 02:47 UTCEG score recompute
- 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.5% · 41st percentile
- 2026-09-26 02:05 UTCEG score recompute
- 2026-09-25 01:23 UTCEG score recompute
- 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.5% · 40th percentile
- 2026-09-24 00:41 UTCEG score recompute
- 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
- 2026-09-23 00:00 UTCEG score recompute
- 2026-09-22 16:01 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
- 2026-09-21 23:19 UTCEG score recompute
- 2026-09-21 21:09 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
- 2026-09-20 22:36 UTCEG score recompute
- 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
- 2026-09-19 21:55 UTCEG score recompute
- 2026-09-18 21:13 UTCEG score recompute
- 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
- 2026-09-17 20:27 UTCEG score recompute
- 2026-09-17 19:30 UTCEG score recompute
- 2026-09-17 15:23 UTCEG score recompute
- 2026-09-17 14:34 UTCEG score recomputeFirst assessed: 6.5 MEDIUM
- 2026-09-17 14:34 UTCMITRE cvelistV5first tracked
Related CVEs(same product + same CWE)
Frequently asked(5)
What is CVE-2026-85078?
When was the CVE record for CVE-2026-85078 published?
Is CVE-2026-85078 actively exploited?
What is the CVSS score of CVE-2026-85078?
How do I remediate CVE-2026-85078?
Dependency Blast Radius
See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-85078
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