CVE-2026-59939

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.5 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.4%, top 64% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
Trending — 3 sources updated this weekElevated
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.5Exploit: Elevated riskExposed: 0

A fix is available — apply it.

httplib2 is a comprehensive HTTP client library for Python. Prior to 0.32.0, httplib2 performs unbounded decompression of HTTP response bodies encoded with Content-Encoding: gzip or deflate in _decompressContent in httplib2/init.py, allowing a malicious or compromised HTTP server to return a small compressed payload that expands to an arbitrarily large size in memory and causes MemoryError or OOM-kill in the client process. This issue is fixed in version 0.32.0.

CVSS v3
7.5
EG Score
7.5(medium)
EG Risk
65(Attend)
EG Risk 65/100SSVC: Attend

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%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
0%
EPSS %ILE
36%
KEV
Not listed

Published

July 8, 2026

Last Modified

August 20, 2026

Advisory Details (2)

Auto-updated Jul 8, 2026
🔬 Proof of concept available. Patch available. Sources: github_commit, github.
github Patch Available🟡 PoC Available

Decompression Bomb Denial of Service via Unbounded gzip/deflate Response Handling · Advisory · httplib2/httplib2 · GitHub

https://github.com/httplib2/httplib2/security/advisories/GHSA-j5g9-f88f-gfj3
github_commit

commit 87581ad6cf75 (httplib2/httplib2)

Fix landed in httplib2/httplib2 commit 87581ad6cf75 — awaiting tagged release

https://github.com/httplib2/httplib2/commit/87581ad6cf752fe3da2090c59058261d2d00a427

Vendor Advisories for CVE-2026-59939(11)

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

Patch Availability(15)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntupython3-httplib2 (0.20.2-2ubuntu0.1) @ jammy2026-09-18ubuntu
redhatfence-agents-0:4.10.0-62.el9_4.272026-08-05redhat
redhatfence-agents-0:4.10.0-43.el9_2.242026-08-05redhat
redhatfence-agents-0:4.10.0-86.el9_6.192026-08-05redhat
redhatansible-automation-platform-27/lightspeed-rhel9:17853752732026-08-04redhat
redhatfence-agents-0:4.10.0-110.el9_8.52026-08-04redhat
redhatansible-automation-platform-25/lightspeed-rhel8:17854301742026-08-04redhat
redhatansible-automation-platform-26/lightspeed-rhel9:17857753602026-08-04redhat
redhatfence-agents-0:4.16.0-5.el10_0.122026-08-04redhat
redhatfence-agents-0:4.16.0-21.el10_2.52026-07-31redhat
redhatfence-agents-0:4.2.1-129.el8_10.272026-07-30redhat
redhatfence-agents-0:4.2.1-89.el8_6.242026-07-30redhat
redhatfence-agents-0:4.2.1-112.el8_8.192026-07-30redhat
redhatfence-agents-0:4.2.1-65.el8_4.302026-07-30redhat
redhatmta/mta-solution-server-rhel9:17841098832026-07-21redhat

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

(5 across 5 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
python-httplib20.18.1-3 ... 0.32.0-1 (11 versions)——
Debian:12(1)
PackageVulnerable rangeFixed inDependents
python-httplib20.20.4-30.20.4-3+deb12u1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
python-httplib20.22.0-10.22.0-1+deb13u1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
python-httplib20.22.0-1, 0.31.2-1, 0.31.2-20.32.0-1—
PyPI(1)
PackageVulnerable rangeFixed inDependents
httplib20.10.3 ... 0.9.2 (44 versions)0.32.0—

Weakness Classification(1)

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

Additional Vendor Advisories

(5)

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 13× in last 7d / 64× 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 199 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-59939?
CVE-2026-59939 is a high vulnerability published on July 8, 2026. httplib2 is a comprehensive HTTP client library for Python. Prior to 0.32.0, httplib2 performs unbounded decompression of HTTP response bodies encoded with Content-Encoding: gzip or deflate in _decompressContent in httplib2/init.py, allowing a malicious or compromised HTTP server to return a small…
When was CVE-2026-59939 disclosed?
CVE-2026-59939 was first published in the National Vulnerability Database on July 8, 2026, with the most recent update on August 20, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-59939 actively exploited?
CVE-2026-59939 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 63.8% of all scored CVEs.
What is the CVSS score of CVE-2026-59939?
CVE-2026-59939 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-59939?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-59939, 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

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