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01 Record

CVE-2026-85077

Sanic: HTTP response header injection via missing CR/LF validation in Sanic HTTP/1.1 responses

HighPUBLISHEDCNA: GitHub_M
CNA base score8.2 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N
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02 Description

Sanic: HTTP response header injection via missing CR/LF validation in Sanic HTTP/1.1 responses

03 Exploitation and scoring

Exploitation
Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
SSVC decision
  • ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
  • AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
  • Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.
CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.
EPSS probability
0.48% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 41.4% of scored records. A rank, not a probability.
NVD base score
8.2 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N
NVD analysis status
Awaiting Analysis. NVD last modified this record on 2026-09-24.
Red Hat severity
Important. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2026-09-17 14:26Z1 MO AGO
Last updated
2026-09-21 20:45Z1 MO AGO
Reserved
2026-09-02
Assigning CNA
GitHub_M
Record state
PUBLISHED
Severity
High (CVSS 8.2)
CNA CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N
Weaknesses
  • CWE-113Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Request/Response Splitting')Variant
  • CWE-93Improper Neutralization of CRLF Sequences ('CRLF Injection')Base
Data version
5.2
Document digest
dffd825d995304b01303f8bf452abbab625779002afbd0127ce5086ca5e37e74

05 Affected products

VendorProductVersionsPlatforms
sanic-orgsanic< 24.12.1, >= 25.12.0, < 25.12.1—

06 References