CVE-2023-49606

Exp

A use-after-free vulnerability exists in the HTTP Connection Headers parsing in Tinyproxy 1.11.1 and Tinyproxy 1.10.0. A specially crafted HTTP header can trigger reuse of previously freed memory, which leads to memory corruption and could lead to remote code execution. An attacker needs to make an unauthenticated HTTP request to trigger this vulnerability.

Published: 2024-05-01 Last update: 2025-11-04 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2023-49606 is rated High Exploit Risk (91.9/100): CVSS Critical severity, with high exploitation likelihood (EPSS 78.97%, 99th percentile). 2 public exploit reference(s) are indexed (Exploit-DB). EPSS rose +3.02% over the last day, indicating growing attacker interest. Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2023-49606

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2023-49606

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-01 75.94% 78.97% +3.02%
2 2026-05-20 74.25% 75.94% +1.70%
3 2026-04-28 — 74.25% —

Full EPSS history (51 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2023-49606

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
9.8 3.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 5.9 [email protected]

Weakness enumeration for CVE-2023-49606

OS Trackers for CVE-2023-49606

vendor priority summary link
alpine critical CVE-2023-49606: 1 source package rows (tinyproxy); 15 state rows across 8 repos (3.17-main, 3.18-main, 3.19-main, 3.20-main, 3.21-main, 3.22-main, 3.23-main, edge-main); fixed 8, open 7. https://security.alpinelinux.org/vuln/CVE-2023-49606
debian not yet assigned CVE-2023-49606 not yet assigned priority: Debian including 1 source packages (tinyproxy), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2023-49606
ubuntu medium CVE-2023-49606 medium priority: Ubuntu including 1 source packages (tinyproxy), 11 status rows across 11 suites (bionic, focal, jammy, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): released 10, ignored 1. https://ubuntu.com/security/CVE-2023-49606

Affected software / configurations for CVE-2023-49606

Vendor Product Version Raw CPE
tinyproxy_project tinyproxy 1.10.0 cpe:2.3:a:tinyproxy_project:tinyproxy:1.10.0:*:*:*:*:*:*:*
tinyproxy_project tinyproxy 1.11.1 cpe:2.3:a:tinyproxy_project:tinyproxy:1.11.1:*:*:*:*:*:*:*

References for CVE-2023-49606

cvelogic Threat Intelligence