CVE-2026-50012

MEDIUMNVD 5.55.5
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to NVD's CVSS score.

This medium-severity CVE scores 5.5 under NVD CVSS v3. EPSS exploit probability: 1.4% (71st percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from NVD CVSS v3
Sources: EPSS, NVD CVSS v3

Also known asEUVD-2026-44961 (ENISA EUVD)Source: ENISA EUVD

5.5EG
EchelonGraph verdictMonitorRemediate within your standard update timelines (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 1.4%CVSS: 5.5Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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.

CVSS v3
5.5
EG Score
5.5MEDIUMmedium confidence
EG Risk
25
EG Risk 25/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity55% × 45%
Impact severity (EG Severity): CVSS 5.5 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation1.4% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at every mission impact level.
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
1.4%
EPSS %ILE
71st
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (5.5): severity, escalated by confirmed exploitation. This CVE's 5.5 is its impact severity (EG Severity), not escalated.

EG Severity
5.5 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.NVD CVSS v3 · CVSS v3.0 or v3.1
EG Likelihood
1.4% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-24). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at every mission impact level.CISA BOD 26-04: 60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at every mission impact level.

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

July 16, 2026

Last Modified

October 24, 2026

Advisory Details (4)

Auto-updated Jul 16, 2026
Patch available. Sources: github, github_pr, github_commit, github_release.
GitHub release Patch Available

v7.6

Patch available: squid-cache/squid SQUID_7_6

https://github.com/squid-cache/squid/releases/tag/SQUID_7_6
GitHub commit

commit 19fcfe922717 (squid-cache/squid)

Fix landed in squid-cache/squid commit 19fcfe922717 — awaiting tagged release

https://github.com/squid-cache/squid/commit/19fcfe922717c8b255270c032dcde4071c003bcd
GitHub pull request

Harden peerDigestSwapInMask against invalid cache digest reply

Upstream fix in progress (PR #2423 · squid-cache/squid, state=closed)

https://github.com/squid-cache/squid/pull/2423
GitHub advisoryMentions a patch (unverified)

SQUID-2026:5 Memory corruption in cache_digest reply handling · Advisory · squid-cache/squid · GitHub

https://github.com/squid-cache/squid/security/advisories/GHSA-5vmx-9x64-9284

Vendor Advisories for CVE-2026-50012(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(1)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntusquidclient (6.14-0ubuntu0.24.04.5) @ noble2026-10-24ubuntu

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(6 across 6 ecosystems)
Alpine:v3.23(1)
PackageVulnerable rangeFix by version rangeDependents
squid—
  • every version up to 7.6-r0: fixed in 7.6-r0
—
Alpine:v3.24(1)
PackageVulnerable rangeFix by version rangeDependents
squid—
  • every version up to 7.6-r0: fixed in 7.6-r0
—
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
squid4.13-10 ... 4.13-10+deb11u6 (7 versions)
  • every version up to 4.13-10+deb11u7: fixed in 4.13-10+deb11u7
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
squid5.7-2 ... 5.7-2+deb12u5 (6 versions)
  • every version up to 5.7-2+deb12u6: fixed in 5.7-2+deb12u6
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
squid6.13-2, 6.13-2+deb13u1
  • every version up to 6.13-2+deb13u2: fixed in 6.13-2+deb13u2
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
squid6.13-2 ... 7.5-1 (6 versions)
  • every version up to 7.6-1: fixed in 7.6-1
—

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Additional Vendor Advisories

(1)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 7× in last 7d / 40× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 100 of 185 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 85 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-02 16:45 UTCEPSS rescoreEPSS 1.4% · 71st percentile
  2. 2026-11-01 16:34 UTCEPSS rescoreEPSS 1.4% · 71st percentile
  3. 2026-10-31 16:33 UTCEPSS rescoreEPSS 1.4% · 71st percentile
  4. 2026-10-30 16:34 UTCEPSS rescoreEPSS 1.4% · 71st percentile
  5. 2026-10-29 16:33 UTCEPSS rescoreEPSS 1.4% · 71st percentile
  6. 2026-10-28 16:32 UTCEPSS rescoreEPSS 1.4% · 71st percentile
  7. 2026-10-27 16:32 UTCEPSS rescoreEPSS 1.4% · 71st percentile
  8. 2026-10-26 16:31 UTCEPSS rescoreEPSS 1.4% · 71st percentile
  9. 2026-10-25 16:33 UTCEPSS rescoreEPSS 1.4% · 71st percentile
  10. 2026-10-25 14:22 UTCEG score recompute
  11. 2026-10-24 20:28 UTCEG score recompute
  12. 2026-10-24 20:28 UTCVendor advisory
  13. 2026-10-24 16:33 UTCEPSS rescoreEPSS 1.4% · 71st percentile
  14. 2026-10-23 16:32 UTCEPSS rescoreEPSS 1.4% · 71st percentile
  15. 2026-10-22 22:59 UTCEG score recompute
  16. 2026-10-22 22:59 UTCVendor advisory
  17. 2026-10-22 16:34 UTCEPSS rescoreEPSS 1.4% · 71st percentile
  18. 2026-10-21 16:33 UTCEPSS rescoreEPSS 1.4% · 71st percentile
  19. 2026-10-20 16:33 UTCEPSS rescoreEPSS 1.4% · 71st percentile
  20. 2026-10-19 16:32 UTCEPSS rescoreEPSS 1.4% · 71st percentile
  21. 2026-10-18 16:32 UTCEPSS rescoreEPSS 1.4% · 71st percentile
  22. 2026-10-18 03:33 UTCEG score recompute
  23. 2026-10-17 16:34 UTCEPSS rescoreEPSS 1.4% · 71st percentile
  24. 2026-10-16 16:42 UTCEPSS rescoreEPSS 1.4% · 71st percentile
  25. 2026-10-15 16:32 UTCEPSS rescoreEPSS 1.4% · 71st percentile
Show 75 more
  1. 2026-10-14 16:33 UTCEPSS rescoreEPSS 1.4% · 71st percentile
  2. 2026-10-13 16:34 UTCEPSS rescoreEPSS 2.7% · 85th percentile
  3. 2026-10-12 16:34 UTCEPSS rescoreEPSS 2.7% · 85th percentile
  4. 2026-10-12 15:59 UTCEG score recompute
  5. 2026-10-11 19:42 UTCEG score recompute
  6. 2026-10-11 16:57 UTCEG score recompute
  7. 2026-10-11 14:21 UTCEG score recompute
  8. 2026-10-11 13:49 UTCEPSS rescoreEPSS 2.7% · 85th percentile
  9. 2026-10-10 20:00 UTCEPSS rescoreEPSS 2.7% · 85th percentile
  10. 2026-10-09 20:07 UTCEPSS rescoreEPSS 2.7% · 85th percentile
  11. 2026-10-08 17:12 UTCEPSS rescoreEPSS 2.7% · 85th percentile
  12. 2026-10-07 23:48 UTCEPSS rescoreEPSS 2.7% · 85th percentile
  13. 2026-10-06 15:18 UTCEPSS rescoreEPSS 2.7% · 85th percentile
  14. 2026-10-05 17:43 UTCEPSS rescoreEPSS 2.7% · 85th percentile
  15. 2026-10-04 23:22 UTCEPSS rescoreEPSS 2.7% · 85th percentile
  16. 2026-10-03 14:26 UTCEPSS rescoreEPSS 2.7% · 85th percentile
  17. 2026-10-02 17:56 UTCEPSS rescoreEPSS 2.7% · 85th percentile
  18. 2026-10-01 19:50 UTCEPSS rescoreEPSS 2.7% · 85th percentile
  19. 2026-10-01 11:23 UTCEG score recompute
  20. 2026-10-01 11:23 UTCVendor advisory
  21. 2026-09-30 15:03 UTCEPSS rescoreEPSS 2.7% · 85th percentile
  22. 2026-09-28 13:51 UTCEPSS rescoreEPSS 2.7% · 85th percentile
  23. 2026-09-28 08:18 UTCEG score recompute
  24. 2026-09-28 08:18 UTCVendor advisory
  25. 2026-09-27 13:48 UTCEPSS rescoreEPSS 2.7% · 85th percentile
  26. 2026-09-26 15:59 UTCEPSS rescoreEPSS 2.7% · 85th percentile
  27. 2026-09-26 00:27 UTCEPSS rescoreEPSS 2.7% · 85th percentile
  28. 2026-09-24 08:29 UTCEG score recompute
  29. 2026-09-24 08:29 UTCVendor advisory
  30. 2026-09-23 17:53 UTCEPSS rescoreEPSS 1.4% · 70th percentile
  31. 2026-09-23 03:02 UTCEG score recompute
  32. 2026-09-23 03:02 UTCVendor advisory
  33. 2026-09-20 20:16 UTCEPSS rescoreEPSS 1.4% · 70th percentile
  34. 2026-09-18 19:28 UTCEPSS rescoreEPSS 1.4% · 70th percentile
  35. 2026-09-18 04:38 UTCEG score recompute
  36. 2026-09-18 04:38 UTCVendor advisory
  37. 2026-09-16 14:08 UTCEPSS rescoreEPSS 1.4% · 70th percentile
  38. 2026-09-16 05:15 UTCEPSS rescoreEPSS 1.4% · 70th percentile
  39. 2026-09-14 07:43 UTCEG score recompute
  40. 2026-09-14 07:43 UTCVendor advisory
  41. 2026-09-13 16:47 UTCEPSS rescoreEPSS 1.4% · 70th percentile
  42. 2026-09-13 07:08 UTCEG score recompute
  43. 2026-09-13 07:08 UTCVendor advisory
  44. 2026-09-11 21:40 UTCEG score recompute
  45. 2026-09-11 21:40 UTCVendor advisory
  46. 2026-09-11 14:53 UTCEPSS rescoreEPSS 1.4% · 70th percentile
  47. 2026-09-10 09:35 UTCEPSS rescoreEPSS 1.4% · 70th percentile
  48. 2026-09-08 22:01 UTCEPSS rescoreEPSS 1.4% · 69th percentile
  49. 2026-09-08 00:29 UTCEG score recompute
  50. 2026-09-08 00:29 UTCVendor advisory
  51. 2026-09-07 16:01 UTCEPSS rescoreEPSS 1.4% · 69th percentile
  52. 2026-09-06 13:47 UTCEPSS rescoreEPSS 1.4% · 69th percentile
  53. 2026-09-05 20:38 UTCEG score recompute
  54. 2026-09-05 20:38 UTCVendor advisory
  55. 2026-09-04 05:06 UTCEPSS rescoreEPSS 1.4% · 69th percentile
  56. 2026-09-02 14:12 UTCEPSS rescoreEPSS 1.4% · 69th percentile
  57. 2026-09-01 13:54 UTCEPSS rescoreEPSS 1.4% · 69th percentile
  58. 2026-09-01 04:40 UTCEPSS rescoreEPSS 1.4% · 69th percentile
  59. 2026-08-31 04:30 UTCEG score recompute
  60. 2026-08-31 04:30 UTCVendor advisory
  61. 2026-08-30 19:17 UTCEPSS rescoreEPSS 1.4% · 69th percentile
  62. 2026-08-30 03:34 UTCEG score recompute
  63. 2026-08-30 03:34 UTCVendor advisory
  64. 2026-08-30 01:22 UTCEPSS rescoreEPSS 1.4% · 69th percentile
  65. 2026-08-28 21:41 UTCEPSS rescoreEPSS 1.4% · 69th percentile
  66. 2026-08-27 14:25 UTCEPSS rescoreEPSS 1.4% · 69th percentile
  67. 2026-08-27 12:29 UTCEG score recompute
  68. 2026-08-27 12:29 UTCVendor advisory
  69. 2026-08-26 14:46 UTCEPSS rescoreEPSS 1.4% · 69th percentile
  70. 2026-08-26 07:59 UTCEG score recompute
  71. 2026-08-26 07:59 UTCVendor advisory
  72. 2026-08-25 13:49 UTCEPSS rescoreEPSS 1.4% · 69th percentile
  73. 2026-08-25 07:23 UTCEG score recompute
  74. 2026-08-25 07:23 UTCVendor advisory
  75. 2026-08-24 06:48 UTCVendor advisory

Frequently asked(5)

What is CVE-2026-50012?
CVE-2026-50012 is a medium-severity vulnerability; its CVE record was published on July 16, 2026. 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…
When was the CVE record for CVE-2026-50012 published?
The CVE record for CVE-2026-50012 was published on July 16, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of October 24, 2026; the record at its source may have been updated since.
Is CVE-2026-50012 actively exploited?
CVE-2026-50012 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1.4% probability of exploitation in the next 30 days (71st percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-50012?
CVE-2026-50012 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2026-50012?
A fix for CVE-2026-50012 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-50012 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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