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: 0.7% (49th percentile of EPSS-scored CVEs). 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
Elevated
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.7%CVSS: 7.5Exploit: Elevated riskExposed services: Not assessed

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
7.5HIGHmedium confidence
EG Risk
65
EG Risk 65/100CISA SSVC

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%
CISA SSVC: Track at low or medium mission impact; Attend at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
0.7%
EPSS %ILE
50th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation public PoC (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

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.
githubMentions a patch (unverified)🟡 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 / EcosystemFix (by version range) / PatchReleasedSource
ubuntupython3-httplib2 (0.22.0-1ubuntu0.1) @ resolute2026-10-01ubuntu
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 rangeFix by version rangeDependents
python-httplib20.18.1-3 ... 0.32.0-1 (11 versions)
  • every version on: no fix on record
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
python-httplib20.20.4-3
  • every version up to 0.20.4-3+deb12u1: fixed in 0.20.4-3+deb12u1
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
python-httplib20.22.0-1
  • every version up to 0.22.0-1+deb13u1: fixed in 0.22.0-1+deb13u1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
python-httplib20.22.0-1, 0.31.2-1, 0.31.2-2
  • every version up to 0.32.0-1: fixed in 0.32.0-1
—
PyPI(1)
PackageVulnerable rangeFix by version rangeDependents
httplib20.10.3 ... 0.9.2 (44 versions)
  • every version up to 0.32.0: fixed in 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 7× in last 7d / 42× 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 224 total refreshes for this CVE.

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

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

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 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 0.7% probability of exploitation in the next 30 days (50th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-59939?
CVE-2026-59939 has a CVSS base score of 7.5 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-59939?
A fix for CVE-2026-59939 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-59939 are linked in the Vendor Advisories panel on this page.

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