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01 Record

CVE-2026-29046

TinyWeb: HTTP Header Control Character Injection into CGI Environment

CriticalPUBLISHEDCNA: GitHub_M
CNA base score9.2 CVSS v4.0CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:L/SC:N/SI:H/SA:L

02 Description

TinyWeb: HTTP Header Control Character Injection into CGI Environment

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
0.40% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 34.2% of scored records. A rank, not a probability.
NVD base score
9.2 (CVSS v4.0), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:L/SC:N/SI:H/SA:L/E:X/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
NVD analysis status
Analyzed. NVD last modified this record on 2026-06-17.
Red Hat severity
No Red Hat rating. Red Hat rates the CVEs that affect its products.

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
2026-03-06 02:54Z7 MO AGO
Last updated
2026-03-06 16:10Z7 MO AGO
Reserved
2026-03-03
Assigning CNA
GitHub_M
Record state
PUBLISHED
Severity
Critical (CVSS 9.2)
CNA CVSS vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:L/SC:N/SI:H/SA:L
Weaknesses
  • CWE-20Improper Input ValidationClass
  • CWE-74Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')Class
  • CWE-93Improper Neutralization of CRLF Sequences ('CRLF Injection')Base
  • CWE-114Process ControlClass
Data version
5.2
Document digest
3a9180eeb1f73179e096f3109d65ff36f28e859682e9c9a6c4ac6376d7e0afb6

05 Affected products

VendorProductVersionsPlatforms
maximmasiutinTinyWeb< 2.04—

06 References