Back to overview

CVE-2026-50012

MEDIUM
5.5
CVSS 3.1
Description
Squid is a caching proxy for the Web. Prior to 7.6, due to an improper input validation bug in cache digest reply handling (peerDigestSwapInMask in src/peer_digest.cc), Squid is vulnerable to a heap-based buffer overflow: a cache digest's on-the-wire size may be larger than the mask_size declared within the digest, so a trusted peer sending a maliciously crafted reply to a cache_digest request message can trigger the overflow. This attack is limited to Squid instances compiled with the --enable-cache-digests option and configured with cache_peer entries. This issue is fixed in version 7.6.

Metadata

CVE ID
CVE-2026-50012
State
PUBLISHED
Assigner
GitHub_M
Reserved
2026-06-02 22:46 UTC
Published
2026-07-16 16:11 UTC
Last updated
2026-07-17 14:04 UTC
Primary CWE
CWE-20
CWE-20: Improper Input Validation
Vendor / Product
squid-cache / squid
Sources
cve.org  ·  NVD

Severity & Metrics

5.5 MEDIUM CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:H
SSVC — CISA Coordinator
Exploitation
none
Automatable
no
Tech. Impact
partial
Affected products (1)
VendorProductPlatformVersions
squid-cache squid — < 7.6
Weakness (CWE)
CWESourceDescription
CWE-122 cna CWE-122: Heap-based Buffer Overflow
CWE-20 cna CWE-20: Improper Input Validation
CVSS scores (1)
ScoreSeverityVersionSourceVector
5.5 MEDIUM 3.1 cna CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:H
References (4)
Back to overview