CVE-2026-34183

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-06-09. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1.0%CVSS: 7.5Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Issue summary: Remote peer may exhaust heap memory of the QUIC server or client by flooding it with packets containing PATH_CHALLENGE frames.

Impact summary: A malicious remote peer can cause an unbounded memory allocation which can lead to an abnormal termination of the application acting as a QUIC client or server and a Denial of Service.

A remote peer may exhaust heap memory by flooding the local QUIC stack with PATH_CHALLENGE frames. The local QUIC stack allocates a PATH_RESPONSE frame for every PATH_CHALLENGE it receives. The allocated PATH_RESPONSE frame gets freed only when the remote peer acknowledges reception of the PATH_RESPONSE frame which will not be done by a malicious peer.

The FIPS modules in 4.0, 3.6, 3.5, 3.4, and 3.0 are not affected by this issue. The QUIC stack is outside of OpenSSL FIPS module boundary.

CVSS v3
7.5
EG Score
7.5HIGHmedium confidence
EG Risk
39
EG Risk 39/100

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
Severity75% × 45%
Exploitation1% × 40%
Automatability30% × 15%
EPSS PROB
1.0%
EPSS %ILE
63rd
KEV
Not listed

Published

June 9, 2026

Last Modified

July 23, 2026

Advisory Details (5)

Auto-updated Jun 11, 2026
Patch available. Sources: github_commit.
generic
https://openssl-library.org/news/secadv/20260609.txt
github_commit

commit fbaa83859c01 (openssl/openssl)

Fix landed in openssl/openssl commit fbaa83859c01 — awaiting tagged release

https://github.com/openssl/openssl/commit/fbaa83859c01ad64f497b757aaf51be7d05ed9eb
github_commit

commit d2e9efbe4900 (openssl/openssl)

Fix landed in openssl/openssl commit d2e9efbe4900 — awaiting tagged release

https://github.com/openssl/openssl/commit/d2e9efbe4900a373227deb136e8665401404ffac
github_commit

commit 7d06955ebe0e (openssl/openssl)

Fix landed in openssl/openssl commit 7d06955ebe0e — awaiting tagged release

https://github.com/openssl/openssl/commit/7d06955ebe0ecf8adfd4c1e92018586da47ef9ac
github_commit

commit 5b306efb0b37 (openssl/openssl)

Fix landed in openssl/openssl commit 5b306efb0b37 — awaiting tagged release

https://github.com/openssl/openssl/commit/5b306efb0b3779dfdd0803b4afc9d08c91f11517

Vendor Advisories for CVE-2026-34183(19)

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

Patch Availability(8)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntuopenssl-provider-legacy (3.5.5-1ubuntu3.2) @ resolute2026-09-14ubuntu
redhatrhui5/rhua-tp-rhel9:17872412602026-08-24redhat
redhatcostmanagement/costmanagement-metrics-rhel9-operator:17835391562026-07-15redhat
redhatinsights-proxy/insights-proxy-container-rhel9:17828905032026-07-01redhat
redhatdiscovery/discovery-ui-rhel9:17821669522026-06-24redhat
redhatrhui5/rhua-rhel9:17815257392026-06-16redhat
redhatopenssl-1:3.5.5-4.el9_82026-06-11redhat
redhatopenssl-1:3.5.5-4.el10_22026-06-11redhat

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:v3.21(1)
PackageVulnerable rangeFix by version rangeDependents
openssl—
  • 3.4.0 up to 3.3.7-r1: fixed in 3.3.7-r1
—
Alpine:v3.22(1)
PackageVulnerable rangeFix by version rangeDependents
openssl—
  • 3.4.0 up to 3.5.7-r0: fixed in 3.5.7-r0
—
Alpine:v3.23(1)
PackageVulnerable rangeFix by version rangeDependents
openssl—
  • 3.4.0 up to 3.5.7-r0: fixed in 3.5.7-r0
—
Alpine:v3.24(1)
PackageVulnerable rangeFix by version rangeDependents
openssl—
  • 3.4.0 up to 3.5.7-r0: fixed in 3.5.7-r0
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
openssl3.5.1-1 ... 3.5.6-1~deb13u1 (11 versions)
  • every version up to 3.5.6-1~deb13u2: fixed in 3.5.6-1~deb13u2
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
openssl3.5.1-1 ... 3.6.2-1 (22 versions)
  • every version up to 3.6.3-1: fixed in 3.6.3-1
—

Weakness Classification(1)

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 6× in last 7d / 27× 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.

Showing the most recent 100 of 378 total refreshes for this CVE.

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

Related CVEs(same product + same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-34183?
CVE-2026-34183 is a high vulnerability published on June 9, 2026. Issue summary: Remote peer may exhaust heap memory of the QUIC server or client by flooding it with packets containing PATH_CHALLENGE frames. Impact summary: A malicious remote peer can cause an unbounded memory allocation which can lead to an abnormal termination of the application acting as a…
When was CVE-2026-34183 disclosed?
CVE-2026-34183 was first published on June 9, 2026, with the most recent update on July 23, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-34183 actively exploited?
CVE-2026-34183 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1.0% probability of exploitation in the next 30 days (63rd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-34183?
CVE-2026-34183 has a CVSS v3.1 base score of 7.5 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-34183?
A fix for CVE-2026-34183 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-34183 are linked in the Vendor Advisories panel on this page.

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