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CVE-2026-50012

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-
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:100464edeaeaaa57e2f7117edf92bf575db943477b72a38dc56c724e0f98cf3c
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 2 assertions

{"cweId":"CWE-122","description":"CWE-122: Heap-based Buffer Overflow","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:3cb38f011b79b85f32098f65c56b5e84b24cc580ad9741db47adfe7c98cf7201 · sha256:0f90ee5804b0b500… · /containers/cna/problemTypes/1/descriptions/0

{"cweId":"CWE-20","description":"CWE-20: Improper Input Validation","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:3cb38f011b79b85f32098f65c56b5e84b24cc580ad9741db47adfe7c98cf7201 · sha256:0f90ee5804b0b500… · /containers/cna/problemTypes/0/descriptions/0

Affected products and versions

1 source assertion
{"product":"squid","vendor":"squid-cache","versions":[{"status":"affected","version":"< 7.6"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:3cb38f011b79b85f32098f65c56b5e84b24cc580ad9741db47adfe7c98cf7201 · sha256:0f90ee5804b0b500… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":5.5,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"LOW","privilegesRequired":"HIGH","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:3cb38f011b79b85f32098f65c56b5e84b24cc580ad9741db47adfe7c98cf7201 · sha256:0f90ee5804b0b500… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

2 source assertions
{"cweId":"CWE-122","description":"CWE-122: Heap-based Buffer Overflow","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:3cb38f011b79b85f32098f65c56b5e84b24cc580ad9741db47adfe7c98cf7201 · sha256:0f90ee5804b0b500… · /containers/cna/problemTypes/1/descriptions/0
{"cweId":"CWE-20","description":"CWE-20: Improper Input Validation","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:3cb38f011b79b85f32098f65c56b5e84b24cc580ad9741db47adfe7c98cf7201 · sha256:0f90ee5804b0b500… · /containers/cna/problemTypes/0/descriptions/0

Source references

4 source assertions
{"name":"https://github.com/squid-cache/squid/commit/19fcfe922717c8b255270c032dcde4071c003bcd","tags":["x_refsource_MISC"],"url":"https://github.com/squid-cache/squid/commit/19fcfe922717c8b255270c032dcde4071c003bcd"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:3cb38f011b79b85f32098f65c56b5e84b24cc580ad9741db47adfe7c98cf7201 · sha256:0f90ee5804b0b500… · /containers/cna/references/2
{"name":"https://github.com/squid-cache/squid/pull/2423","tags":["x_refsource_MISC"],"url":"https://github.com/squid-cache/squid/pull/2423"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:3cb38f011b79b85f32098f65c56b5e84b24cc580ad9741db47adfe7c98cf7201 · sha256:0f90ee5804b0b500… · /containers/cna/references/1
{"name":"https://github.com/squid-cache/squid/releases/tag/SQUID_7_6","tags":["x_refsource_MISC"],"url":"https://github.com/squid-cache/squid/releases/tag/SQUID_7_6"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:3cb38f011b79b85f32098f65c56b5e84b24cc580ad9741db47adfe7c98cf7201 · sha256:0f90ee5804b0b500… · /containers/cna/references/3
{"name":"https://github.com/squid-cache/squid/security/advisories/GHSA-5vmx-9x64-9284","tags":["x_refsource_CONFIRM"],"url":"https://github.com/squid-cache/squid/security/advisories/GHSA-5vmx-9x64-9284"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:3cb38f011b79b85f32098f65c56b5e84b24cc580ad9741db47adfe7c98cf7201 · sha256:0f90ee5804b0b500… · /containers/cna/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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