CVE-2026-59883

MEDIUMNVD 6.16.1—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.1 under NVD CVSS v3. EPSS exploit probability: 0.2% (5th 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, nvd
6.1EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 6.1Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Guzzle is an extensible PHP HTTP client. Prior to 7.12.3, CookieJar did not restrict cookies scoped to IP-address or bare-numeric Domain values to the exact host that set them, because SetCookie::matchesDomain() applied ordinary suffix matching to domains such as 192.168.0.1, [::1], or 1, allowing cross-host cookie disclosure, cookie injection, or session fixation. This issue is fixed in version 7.12.3.

CVSS v3
6.1
EG Score
6.1MEDIUMmedium confidence
EG Risk
28
EG Risk 28/100CISA 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
Severity61% × 45%
Exploitation0% × 40%
Automatability0% × 15%
CISA SSVC: Track at every mission impact level.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.2%
EPSS %ILE
5th
KEV
Not listed

CISA SSVCTrack 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). 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

July 13, 2026

Advisory Details (4)

Auto-updated Jul 8, 2026
Patch available. Sources: github, github_commit, github_pr, github_release.
githubMentions a patch (unverified)

Cookie Disclosure and Injection via IP-Address Domains in guzzlehttp/guzzle · Advisory · guzzle/guzzle · GitHub

https://github.com/guzzle/guzzle/security/advisories/GHSA-g446-98w2-8p5w
github_release Patch Available

7.12.3

Patch available: guzzle/guzzle 7.12.3

https://github.com/guzzle/guzzle/releases/tag/7.12.3
github_pr Patch Available

Treat IP cookie domains as exact-only

Patch available: guzzle/guzzle 7.12.3 (PR #3694 merged 2026-06-23)

https://github.com/guzzle/guzzle/pull/3694
github_commit Patch Available

commit b9944c161b12 (guzzle/guzzle)

Patch available: guzzle/guzzle 7.12.3 (contains commit b9944c161b12)

https://github.com/guzzle/guzzle/commit/b9944c161b12d9ee9c9334cfc5b9659ecd7451f8

Vendor Advisories for CVE-2026-59883(1)

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

Affected Packages

(4 across 4 ecosystems)
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
guzzle7.11.0-1 ... 8.2.0-1 (19 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
guzzle7.11.0-1 ... 8.2.0-1 (18 versions)
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
guzzle7.11.0-1, 7.12.0-1, 7.12.1-1, 7.9.2-0.1
  • every version up to 7.12.3-1: fixed in 7.12.3-1
—
Packagist(1)
PackageVulnerable rangeFix by version rangeDependents
guzzlehttp/guzzle4.0.0 ... v3.8.1 (165 versions)
  • every version up to 7.12.3: fixed in 7.12.3
—

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 33× 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 129 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2026-59883?
CVE-2026-59883 is a medium vulnerability published on July 8, 2026. Guzzle is an extensible PHP HTTP client. Prior to 7.12.3, CookieJar did not restrict cookies scoped to IP-address or bare-numeric Domain values to the exact host that set them, because SetCookie::matchesDomain() applied ordinary suffix matching to domains such as 192.168.0.1, [::1], or 1, allowing…
When was CVE-2026-59883 disclosed?
CVE-2026-59883 was first published on July 8, 2026, with the most recent update on July 13, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-59883 actively exploited?
CVE-2026-59883 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (5th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-59883?
CVE-2026-59883 has a CVSS v3 base score of 6.1 (NVD).
How do I remediate CVE-2026-59883?
A fix for CVE-2026-59883 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-59883 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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