CVE-2026-48856

MEDIUMNVD 6.56.5—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.5 under NVD CVSS v3. EPSS exploit probability: 0.3%, top 73% 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, nvd
Trending — 3 sources updated this week
6.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.5Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

Sensitive Data Exposure vulnerability in Erlang OTP inets (httpc_response module) allows Retrieve Embedded Sensitive Data.

The httpc client forwards the Authorization and Proxy-Authorization request headers to redirect targets without checking whether the redirect crosses an origin boundary. httpc_response:redirect/2 constructs the redirected request by updating only the host field of the header record; all other fields (including authorization and proxy_authorization) are copied verbatim. The redirect target host is never compared against the original host.

autoredirect defaults to true, so this affects all httpc callers that do not explicitly disable automatic redirects.

An attacker who controls a server that the victim contacts via httpc can issue a cross-origin 3xx redirect to a server they also control. The Authorization header (including Basic credentials derived from URL userinfo via httpc_request:handle_user_info/2) is forwarded to the redirect target, allowing credential theft. The same applies to the Proxy-Authorization header.

This vulnerability is associated with program files lib/inets/src/http_client/httpc_response.erl.

This issue affects OTP from OTP 17.0 before OTP 29.0.2, OTP 28.5.0.2 and OTP 27.3.4.13, corresponding to inets from 5.10 before 9.7.1, 9.6.2.2 and 9.3.2.6.

CVSS v3
6.5
EG Score
6.5(medium)
EG Risk
29(Track)
EG Risk 29/100SSVC: Track

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
Severity65% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
27%
KEV
Not listed

Published

June 10, 2026

Last Modified

July 24, 2026

Advisory Details (5)

Auto-updated Jun 11, 2026
Patch available. Sources: github_commit, github.
generic

Versions — Erlang System Documentation v29.0.2

https://www.erlang.org/doc/system/versions.html#order-of-versions
generic

OSV - Open Source Vulnerabilities

https://osv.dev/vulnerability/EEF-CVE-2026-48856
github Patch Available

httpc leaks Authorization header to cross-origin redirect targets · Advisory · erlang/otp · GitHub

https://github.com/erlang/otp/security/advisories/GHSA-m75x-4vwg-ggjh
github_commit

commit 688d748d6f7a (erlang/otp)

Fix landed in erlang/otp commit 688d748d6f7a — awaiting tagged release

https://github.com/erlang/otp/commit/688d748d6f7a6a06b13b662a1d3de8af97079612
generic

httpc leaks Authorization header to cross-origin redirect targets | Erlang Ecosystem Foundation CNA

https://cna.erlef.org/cves/CVE-2026-48856.html

Vendor Advisories for CVE-2026-48856(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:11(1)
PackageVulnerable rangeFixed inDependents
erlang1:23.2.6+dfsg-1 ... 1:29.0~rc3+dfsg-4 (117 versions)——
Debian:12(1)
PackageVulnerable rangeFixed inDependents
erlang1:25.2.3+dfsg-1 ... 1:29.0~rc3+dfsg-4 (78 versions)——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
erlang1:27.3.4.1+dfsg-1, 1:27.3.4.1+dfsg-1+deb13u1, 1:27.3.4.1+dfsg-1+deb13u21:27.3.4.1+dfsg-1+deb13u3—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
erlang1:27.3.4.1+dfsg-1 ... 1:29.0~rc3+dfsg-4 (33 versions)1:29.0.2+dfsg-1—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 6× in last 7d / 30× 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 182 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-48856?
CVE-2026-48856 is a medium vulnerability published on June 10, 2026. Sensitive Data Exposure vulnerability in Erlang OTP inets (httpc_response module) allows Retrieve Embedded Sensitive Data. The httpc client forwards the Authorization and Proxy-Authorization request headers to redirect targets without checking whether the redirect crosses an origin boundary.…
When was CVE-2026-48856 disclosed?
CVE-2026-48856 was first published in the National Vulnerability Database on June 10, 2026, with the most recent update on July 24, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-48856 actively exploited?
CVE-2026-48856 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 73.0% of all scored CVEs.
What is the CVSS score of CVE-2026-48856?
CVE-2026-48856 has a CVSS v3 base score of 6.5 (NVD).
How do I remediate CVE-2026-48856?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-48856, 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.

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