CVE-2023-49285

CRITICALNVD 7.59.0▲
EchelonGraph scoreHIGH confidence

Score elevated to 9.0 because EPSS predicts 89% probability of exploitation within the next 30 days (top 0.2% of all CVEs). NVD baseline CVSS 7.5 retained for reference. Confidence: see factors.

Triggered by: EPSS exploit prediction ≥85%
Sources: epss, nvd
Trending — 3 sources updated this weekElevated
9.0EG
EchelonGraph verdictPatch this weekExploitation is likely or a public exploit exists.
  • High exploitation likelihood — EPSS 89%
CISA-KEV: Not listedEPSS PROB: 89%CVSS: 7.5Exploit: Elevated riskExposed: 0

A fix is available — apply it.

Squid is a caching proxy for the Web supporting HTTP, HTTPS, FTP, and more. Due to a Buffer Overread bug Squid is vulnerable to a Denial of Service attack against Squid HTTP Message processing. This bug is fixed by Squid version 6.5. Users are advised to upgrade. There are no known workarounds for this vulnerability.

CVSS v3
7.5
EG Score
9.0(high)
EG Risk
81(Track)
EG Risk 81/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity90% × 45%
Exploitation89% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
89%
EPSS %ILE
100%
KEV
Not listed

Published

December 4, 2023

Last Modified

June 17, 2026

References (18)

Vendor Advisories for CVE-2023-49285(9)

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

Patch Availability(11)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntusquidclient (3.5.12-1ubuntu7.16+esm3) @ xenial2026-05-24ubuntu
ubuntusquidclient (6.1-2ubuntu1.2) @ mantic2026-05-24ubuntu
redhatsquid-7:3.5.20-17.el7_9.102024-04-11redhat
redhatsquid-7:5.2-1.el9_0.42024-03-05redhat
redhatsquid:4-8020020240122164331.4cda2c842024-02-12redhat
redhatsquid:4-8060020231222131040.ad008a3a2024-02-12redhat
redhatsquid:4-8040020240122165847.522a0ee42024-02-12redhat
redhatsquid:4-8080020231222130009.63b345852024-01-24redhat
redhatsquid-7:5.5-6.el9_3.52024-01-08redhat
redhatsquid-7:5.5-5.el9_2.32024-01-08redhat
redhatsquid:4-8090020231207155957.a75119d52024-01-03redhat

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.

Weakness Classification(2)

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

Additional Vendor Advisories

(2)

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 9× in last 7d / 15× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. 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. Most recent first.

  1. 2026-07-25 14:16 UTCEPSS rescore
  2. 2026-07-24 14:16 UTCEPSS rescore
  3. 2026-07-24 14:16 UTCEPSS rescore
  4. 2026-07-23 02:28 UTCEG score recompute
  5. 2026-07-22 21:20 UTCEG score recompute▲ 0.40
  6. 2026-07-22 21:20 UTCVendor advisory
  7. 2026-07-22 14:06 UTCEPSS rescore
  8. 2026-07-21 15:23 UTCEPSS rescore
  9. 2026-07-21 15:23 UTCEPSS rescore
  10. 2026-07-15 16:56 UTCEPSS rescore
  11. 2026-07-15 16:56 UTCEPSS rescore
  12. 2026-07-15 02:19 UTCOSV refresh
  13. 2026-07-07 13:44 UTCEPSS rescore
  14. 2026-07-07 13:44 UTCEPSS rescore
  15. 2026-07-01 15:05 UTCEPSS rescore
  16. 2026-06-27 03:07 UTCEPSS rescore
  17. 2026-06-27 03:07 UTCOSV refresh
  18. 2026-06-24 14:04 UTCEPSS rescore
  19. 2026-06-24 14:04 UTCEPSS rescore
  20. 2026-06-24 06:32 UTCNVD updateCVSS v3 → 7.5
  21. 2026-06-23 21:31 UTCEPSS rescore
  22. 2026-06-23 21:31 UTCEPSS rescore
  23. 2026-06-22 14:24 UTCEPSS rescore
  24. 2026-06-22 14:24 UTCEPSS rescore
  25. 2026-06-15 17:47 UTCEPSS rescore
Show 37 more
  1. 2026-06-14 23:16 UTCEPSS rescore
  2. 2026-06-13 22:59 UTCEPSS rescore
  3. 2026-06-13 22:59 UTCEPSS rescore
  4. 2026-06-12 23:11 UTCEPSS rescore
  5. 2026-06-12 23:10 UTCEPSS rescore
  6. 2026-06-11 13:59 UTCEPSS rescore
  7. 2026-06-10 22:17 UTCEPSS rescore
  8. 2026-06-10 13:21 UTCEPSS rescore
  9. 2026-06-09 13:47 UTCOSV refresh
  10. 2026-06-08 14:16 UTCEPSS rescore
  11. 2026-06-08 14:16 UTCEPSS rescore
  12. 2026-06-07 15:24 UTCEPSS rescore
  13. 2026-06-07 15:23 UTCEPSS rescore
  14. 2026-06-06 13:46 UTCEPSS rescore
  15. 2026-06-06 13:46 UTCEPSS rescore
  16. 2026-06-05 22:46 UTCEPSS rescore
  17. 2026-06-05 22:46 UTCEPSS rescore
  18. 2026-06-05 06:09 UTCEPSS rescore
  19. 2026-06-05 06:09 UTCEPSS rescore
  20. 2026-06-05 06:09 UTCEPSS rescore
  21. 2026-06-04 13:11 UTCEPSS rescore
  22. 2026-06-04 13:11 UTCEPSS rescore
  23. 2026-06-04 13:11 UTCEPSS rescore
  24. 2026-06-02 20:12 UTCEPSS rescore
  25. 2026-06-02 20:12 UTCEPSS rescore
  26. 2026-05-31 22:30 UTCEPSS rescore
  27. 2026-05-31 22:30 UTCEPSS rescore
  28. 2026-05-31 00:15 UTCEPSS rescore
  29. 2026-05-31 00:15 UTCEPSS rescore
  30. 2026-05-29 13:43 UTCEPSS rescore
  31. 2026-05-28 13:44 UTCEPSS rescore
  32. 2026-05-27 13:39 UTCEPSS rescore
  33. 2026-05-27 13:39 UTCEPSS rescore
  34. 2026-05-26 13:43 UTCEPSS rescore
  35. 2026-05-26 13:43 UTCEPSS rescore
  36. 2026-05-24 12:50 UTCEG score recompute
  37. 2026-05-24 12:50 UTCVendor advisory

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2023-49285?
CVE-2023-49285 is a critical vulnerability published on December 4, 2023. Squid is a caching proxy for the Web supporting HTTP, HTTPS, FTP, and more. Due to a Buffer Overread bug Squid is vulnerable to a Denial of Service attack against Squid HTTP Message processing. This bug is fixed by Squid version 6.5. Users are advised to upgrade. There are no known workarounds for…
When was CVE-2023-49285 disclosed?
CVE-2023-49285 was first published in the National Vulnerability Database on December 4, 2023, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2023-49285 actively exploited?
CVE-2023-49285 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 89% probability of exploitation in the next 30 days, which ranks it in the top 0.2% of all scored CVEs.
What is the CVSS score of CVE-2023-49285?
CVE-2023-49285 has a CVSS v3 base score of 7.5 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.0.
How do I remediate CVE-2023-49285?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-49285, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2023-49285

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