Is CVE-2023-49606 in the CISA KEV catalog?

No. CVE-2023-49606 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2023-49606?

CVE-2023-49606 has a CVSS v3 base score of 9.8 (CRITICAL).

What is the EPSS score for CVE-2023-49606?

CVE-2023-49606 has an EPSS score of 63.08% (99th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2023-49606?

Upgrade tinyproxy on debian 11 to 1.10.0-5+deb11u1 or later. Fixes are available for 3 affected products.

CVE & CISA-KEV Catalog

CVE-2023-49606

CRITICALEPSS 99th pctl

9.8

CVSS v3

NVD

Description

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.

CWE-416Use After Free

How to fix

Remediation Available

tinyproxyDebian

Fixed in:1.10.0-5+deb11u1CVE-2023-49606

Fixed in:1.11.1-2.1+deb12u1CVE-2023-49606

Fixed in:1.11.1-4CVE-2023-49606

tinyproxyUbuntu

Fixed in:1.8.3-3ubuntu14.04.1~esm3USN-7190-1

Fixed in:1.8.3-3ubuntu16.04.1~esm3USN-7190-1

Fixed in:1.8.4-5ubuntu0.1~esm3USN-7190-1

Fixed in:1.10.0-4ubuntu0.2USN-7190-1

Fixed in:1.11.0-1ubuntu0.1~esm2USN-7190-1

Fixed in:1.11.1-3ubuntu0.1USN-7190-1

tinyproxy-binUbuntu

Fixed in:1.8.4-5ubuntu0.1~esm3USN-7190-1

Fixed in:1.10.0-4ubuntu0.2USN-7190-1

Fixed in:1.11.0-1ubuntu0.1~esm2USN-7190-1

Fixed in:1.11.1-3ubuntu0.1USN-7190-1

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

63.08%probability of exploitation in 30 days

99thpercentile

Very high risk: more likely to be exploited than 99% of all known CVEs.

References

Patch1

openwall.com

Exploit1

talosintelligence.com

Other references2

Related Vulnerabilities

Other CWE-416 (Use After Free) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2019-0708	Critical	9.8	100%	KEV + Ransom	-
CVE-2021-31166	Critical	9.8	100%	KEV	Fix
CVE-2015-5119	Critical	9.8	99%	KEV	-
CVE-2010-3962	High	8.1	97%	KEV	-
CVE-2015-0313	Critical	9.8	96%	KEV	Fix
CVE-2017-9798	High	7.5	95%	-	Fix

Embed a live status badge for CVE-2023-49606

Markdown

[![CVE-2023-49606](https://tridentstack.com/cve/badge/CVE-2023-49606.svg)](https://tridentstack.com/cve/CVE-2023-49606)

HTML

<a href="https://tridentstack.com/cve/CVE-2023-49606"><img src="https://tridentstack.com/cve/badge/CVE-2023-49606.svg" alt="CVE-2023-49606"></a>

Find and fix vulnerabilities across your fleet

TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.

See how it works Start freeThis CVE lookup is free and always will be.

This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-11-04.