CVE-2026-44889

MEDIUMPre-NVD 6.16.1—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.1 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.3%, top 81% 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
6.1EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 6.1Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

WebOb provides objects for HTTP requests and responses. Prior to 1.8.10, the normalization of the HTTP Location header during a redirect is vulnerable to an open redirect: WebOb joins the redirect target to the request URI using Python's urljoin, and since Python 3.10 the underlying urlsplit strips ASCII tab, carriage return, and newline characters before parsing, so a redirect target containing such characters can be reinterpreted as a protocol-relative URL whose authority is an attacker-controlled host. This bypasses the CVE-2024-42353 fix that escaped a leading double slash, allowing an attacker who influences the redirect location to send users to an arbitrary external site instead of the intended one. This vulnerability is fixed in 1.8.10.

CVSS v3
6.1
EG Score
6.1MEDIUMmedium confidence
EG Risk
28
EG Risk 28/100

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
Severity61% × 45%
Exploitation0% × 40%
Automatability0% × 15%
EPSS PROB
0.3%
EPSS %ILE
17th
KEV
Not listed

Published

June 4, 2026

Last Modified

June 26, 2026

Advisory Details (1)

Auto-updated Jun 23, 2026
Patch available. Sources: github.
githubMentions a patch (unverified)

Location header normalization during redirect leads to open redirect - again · Advisory · Pylons/webob · GitHub

https://github.com/Pylons/webob/security/advisories/GHSA-fh3h-vg37-cc95

Vendor Advisories for CVE-2026-44889(2)

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

Affected Packages

(5 across 5 ecosystems)
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
python-webob1:1.8.10-1 ... 1:1.8.9-2 (9 versions)
  • every version on: no fix on record
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
python-webob1:1.8.10-1 ... 1:1.8.9-2 (8 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
python-webob1:1.8.9-1, 1:1.8.9-2
  • every version up to 1:1.8.10-0+deb13u1: fixed in 1:1.8.10-0+deb13u1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
python-webob1:1.8.9-1, 1:1.8.9-2
  • every version up to 1:1.8.10-1: fixed in 1:1.8.10-1
—
PyPI(1)
PackageVulnerable rangeFix by version rangeDependents
webob0.8 ... 1.8.9 (73 versions)
  • every version up to 1.8.10: fixed in 1.8.10
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 26× 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 152 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 17:12 UTCEPSS rescore
  4. 2026-10-07 23:48 UTCEPSS rescore
  5. 2026-10-06 15:18 UTCEPSS rescore
  6. 2026-10-05 17:43 UTCEPSS rescore
  7. 2026-10-04 23:22 UTCEPSS rescore
  8. 2026-10-03 14:25 UTCEPSS rescore
  9. 2026-10-03 12:09 UTCOSV refresh
  10. 2026-10-01 19:50 UTCEPSS rescore
  11. 2026-09-30 15:03 UTCEPSS rescore
  12. 2026-09-27 13:48 UTCEPSS rescore
  13. 2026-09-26 15:58 UTCEPSS rescore
  14. 2026-09-23 17:53 UTCEPSS rescore
  15. 2026-09-20 20:15 UTCEPSS rescore
  16. 2026-09-18 19:28 UTCEPSS rescore
  17. 2026-09-17 19:31 UTCEPSS rescore
  18. 2026-09-16 14:08 UTCEPSS rescore
  19. 2026-09-16 05:15 UTCEPSS rescore
  20. 2026-09-14 05:24 UTCEG score recompute
  21. 2026-09-14 05:24 UTCVendor advisory
  22. 2026-09-13 16:47 UTCEPSS rescore
  23. 2026-09-12 23:36 UTCOSV refresh
  24. 2026-09-12 15:01 UTCEPSS rescore
  25. 2026-09-11 14:53 UTCEPSS rescore
Show 75 more
  1. 2026-09-11 09:37 UTCEPSS rescore
  2. 2026-09-10 09:34 UTCEPSS rescore
  3. 2026-09-08 22:00 UTCEPSS rescore
  4. 2026-09-06 13:47 UTCEPSS rescore
  5. 2026-09-04 05:06 UTCEPSS rescore
  6. 2026-09-02 14:12 UTCEPSS rescore
  7. 2026-09-01 13:54 UTCEPSS rescore
  8. 2026-08-30 19:17 UTCEPSS rescore
  9. 2026-08-30 01:22 UTCEPSS rescore
  10. 2026-08-28 21:41 UTCEPSS rescore
  11. 2026-08-27 14:25 UTCEPSS rescore
  12. 2026-08-26 14:46 UTCEPSS rescore
  13. 2026-08-25 13:49 UTCEPSS rescore
  14. 2026-08-25 03:28 UTCEG score recompute
  15. 2026-08-23 12:42 UTCEG score recompute
  16. 2026-08-23 12:42 UTCVendor advisory
  17. 2026-08-21 23:49 UTCEPSS rescore
  18. 2026-08-21 14:36 UTCEG score recompute
  19. 2026-08-21 14:36 UTCVendor advisory
  20. 2026-08-20 22:55 UTCEPSS rescore
  21. 2026-08-20 09:56 UTCEG score recompute
  22. 2026-08-20 09:56 UTCVendor advisory
  23. 2026-08-19 17:04 UTCEPSS rescore
  24. 2026-08-18 13:48 UTCEPSS rescore
  25. 2026-08-17 13:47 UTCEPSS rescore
  26. 2026-08-17 03:23 UTCEG score recompute
  27. 2026-08-17 03:23 UTCVendor advisory
  28. 2026-08-16 14:56 UTCEPSS rescore
  29. 2026-08-16 02:14 UTCEG score recompute
  30. 2026-08-16 02:14 UTCVendor advisory
  31. 2026-08-16 02:14 UTCEPSS rescore
  32. 2026-08-15 01:30 UTCEPSS rescore
  33. 2026-08-14 23:37 UTCVendor advisory
  34. 2026-08-13 23:18 UTCEG score recompute
  35. 2026-08-13 23:18 UTCVendor advisory
  36. 2026-08-13 22:00 UTCEPSS rescore
  37. 2026-08-12 22:58 UTCEG score recompute
  38. 2026-08-12 13:51 UTCEPSS rescore
  39. 2026-08-11 22:39 UTCEG score recompute
  40. 2026-08-11 22:39 UTCVendor advisory
  41. 2026-08-11 00:00 UTCEPSS rescore
  42. 2026-08-09 21:46 UTCEG score recompute
  43. 2026-08-09 13:46 UTCEPSS rescore
  44. 2026-08-08 21:27 UTCEG score recompute
  45. 2026-08-08 21:27 UTCVendor advisory
  46. 2026-08-08 16:37 UTCEPSS rescore
  47. 2026-08-07 21:07 UTCEG score recompute
  48. 2026-08-06 20:48 UTCEG score recompute
  49. 2026-08-06 20:48 UTCVendor advisory
  50. 2026-08-06 13:46 UTCEPSS rescore
  51. 2026-08-05 20:29 UTCEG score recompute
  52. 2026-08-05 20:29 UTCVendor advisory
  53. 2026-08-05 19:17 UTCEPSS rescore
  54. 2026-08-04 19:06 UTCEG score recompute
  55. 2026-08-04 19:06 UTCVendor advisory
  56. 2026-08-04 15:10 UTCEPSS rescore
  57. 2026-08-04 10:38 UTCEPSS rescore
  58. 2026-08-03 15:40 UTCEG score recompute
  59. 2026-08-03 10:36 UTCEPSS rescore
  60. 2026-08-02 13:11 UTCEG score recompute
  61. 2026-08-02 13:11 UTCVendor advisory
  62. 2026-08-02 02:27 UTCEPSS rescore
  63. 2026-08-01 12:52 UTCEG score recompute
  64. 2026-08-01 12:52 UTCVendor advisory
  65. 2026-08-01 04:16 UTCEPSS rescore
  66. 2026-07-31 05:26 UTCEG score recompute
  67. 2026-07-31 05:26 UTCVendor advisory
  68. 2026-07-30 16:28 UTCEPSS rescore
  69. 2026-07-30 01:30 UTCEPSS rescore
  70. 2026-07-29 10:06 UTCEG score recompute
  71. 2026-07-29 10:06 UTCVendor advisory
  72. 2026-07-28 15:36 UTCEPSS rescore
  73. 2026-07-28 03:22 UTCEG score recompute
  74. 2026-07-28 03:22 UTCVendor advisory
  75. 2026-07-27 14:13 UTCEPSS rescore

Related CVEs(same product + same CWE)

Same product

2 shown

Debian:11:python-webob · Debian:12:python-webob

Frequently asked(5)

What is CVE-2026-44889?
CVE-2026-44889 is a medium vulnerability published on June 4, 2026. WebOb provides objects for HTTP requests and responses. Prior to 1.8.10, the normalization of the HTTP Location header during a redirect is vulnerable to an open redirect: WebOb joins the redirect target to the request URI using Python's urljoin, and since Python 3.10 the underlying urlsplit strips…
When was CVE-2026-44889 disclosed?
CVE-2026-44889 was first published on June 4, 2026, with the most recent update on June 26, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-44889 actively exploited?
CVE-2026-44889 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (17th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-44889?
CVE-2026-44889 has a CVSS base score of 6.1 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-44889?
A fix for CVE-2026-44889 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-44889 are linked in the Vendor Advisories panel on this page.

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