CVE-2026-31842

8.7 highEPSS 0.6%

High (8.7) in tinyproxy project tinyproxy. EPSS 0.6% chance of exploitation in the next 30 days.

Tinyproxy through 1.11.3 is vulnerable to HTTP request parsing desynchronization due to a case-sensitive comparison of the Transfer-Encoding header in src/reqs.c. The is_chunked_transfer function uses strcmp to compare the header value against "chunked", even though RFC 7230 specifies that transfer-coding names are case-insensitive.

Severity

CVSS 4.0

8.7 high

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

CVSS 3.1

7.5 high

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS: 0.6% chance of exploitation in the next 30 days; higher than 47% of CVEs (scores of 2026-10-31)
CWE: CWE-444
Published: 2026-04-07
Modified: 2026-08-10
Record from: the NVD, synced 2026-10-19

Affected

tinyproxy_project:tinyproxy

References

https://datatracker.ietf.org/doc/html/rfc7230
https://github.com/tinyproxy/tinyproxy
https://github.com/tinyproxy/tinyproxy/issues/604

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