CVE-2026-76984

MEDIUMNVD 5.45.4—
EchelonGraph scoreHIGH confidence

Score 5.4 from GitHub Security Advisory published 2026-08-31. NVD baseline CVSS 5.4; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 3 sources updated this week
5.4EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 5.4Exploit: None knownExposed: 0

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

Improper neutralization of input during web page generation in Apache Wicket.

org.apache.wicket.markup.head.MetaDataHeaderItem generates and header tags. It escaped the attribute names it wrote, but ran the attribute values through a replacement of " with \". A backslash before a double quote means nothing in HTML, so a value containing a double quote ends its own attribute and what follows is parsed as further attributes of the generated tag.

An application is affected where it supplies an attribute value holding data an attacker can influence, through addTagAttribute or the forMetaTag and forLinkTag factory methods. A value may be given as an IModel, so it is not necessarily a literal.

There is no setting to change; an application can only avoid supplying a value that contains a double quote. Note that these values have never been escaped effectively: before the change released in 6.24.0, 7.4.0 and 8.0.0 they were written with no escaping at all.

This issue affects Apache Wicket: from 8.0.0 through 8.18.0, from 9.0.0 through 9.23.0, from 10.0.0 through 10.10.0. Older, unsupported releases from 6.17.0 onwards are also affected. Users are recommended to upgrade to version 8.19.0, 9.24.0 or 10.11.0, which fix the issue.

CVSS v3
5.4
EG Score
5.4(high)
EG Risk
25(Track)
EG Risk 25/100SSVC: 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
Severity54% × 45%
Exploitation1% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
41%
KEV
Not listed

Published

August 31, 2026

Last Modified

September 1, 2026

Advisory Details (1)

Auto-updated Aug 31, 2026
No patch confirmed yet.
generic
https://lists.apache.org/thread/jt8yxntfjcxnnntth1qjtdo19gzx5n6v

Vendor Advisories for CVE-2026-76984(1)

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

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 18× in last 7d / 69× 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.

  1. 2026-09-24 14:28 UTCEG score recompute
  2. 2026-09-24 14:28 UTCGHSA enrichment
  3. 2026-09-24 14:04 UTCEPSS rescore
  4. 2026-09-23 17:54 UTCEPSS rescore
  5. 2026-09-23 12:08 UTCEG score recompute
  6. 2026-09-23 12:08 UTCGHSA enrichment
  7. 2026-09-22 16:01 UTCEPSS rescore
  8. 2026-09-22 10:06 UTCEG score recompute
  9. 2026-09-22 10:06 UTCGHSA enrichment
  10. 2026-09-21 21:09 UTCEPSS rescore
  11. 2026-09-21 08:03 UTCEG score recompute
  12. 2026-09-21 08:03 UTCGHSA enrichment
  13. 2026-09-20 20:16 UTCEPSS rescore
  14. 2026-09-20 06:01 UTCEG score recompute
  15. 2026-09-20 06:01 UTCGHSA enrichment
  16. 2026-09-19 03:59 UTCEG score recompute
  17. 2026-09-19 03:59 UTCGHSA enrichment
  18. 2026-09-18 19:28 UTCEPSS rescore
  19. 2026-09-18 01:56 UTCEG score recompute
  20. 2026-09-18 01:56 UTCGHSA enrichment
  21. 2026-09-16 23:54 UTCEG score recompute
  22. 2026-09-16 23:54 UTCGHSA enrichment
  23. 2026-09-16 14:08 UTCEPSS rescore
  24. 2026-09-16 05:15 UTCEPSS rescore
  25. 2026-09-15 21:51 UTCEG score recompute
Show 44 more
  1. 2026-09-15 21:51 UTCGHSA enrichment
  2. 2026-09-15 03:12 UTCEPSS rescore
  3. 2026-09-14 19:49 UTCGHSA enrichment
  4. 2026-09-13 17:47 UTCEG score recompute
  5. 2026-09-13 17:47 UTCGHSA enrichment
  6. 2026-09-12 15:45 UTCEG score recompute
  7. 2026-09-12 15:45 UTCGHSA enrichment
  8. 2026-09-12 15:02 UTCEPSS rescore
  9. 2026-09-11 14:53 UTCEPSS rescore
  10. 2026-09-11 13:43 UTCEG score recompute
  11. 2026-09-11 13:43 UTCGHSA enrichment
  12. 2026-09-10 11:40 UTCEG score recompute
  13. 2026-09-10 11:40 UTCGHSA enrichment
  14. 2026-09-10 09:35 UTCEPSS rescore
  15. 2026-09-09 08:34 UTCEG score recompute
  16. 2026-09-09 08:34 UTCGHSA enrichment
  17. 2026-09-08 22:01 UTCEPSS rescore
  18. 2026-09-08 06:31 UTCEG score recompute
  19. 2026-09-08 06:31 UTCGHSA enrichment
  20. 2026-09-07 04:28 UTCEG score recompute
  21. 2026-09-07 04:28 UTCGHSA enrichment
  22. 2026-09-06 13:48 UTCEPSS rescore
  23. 2026-09-06 02:22 UTCEG score recompute
  24. 2026-09-06 02:22 UTCGHSA enrichment
  25. 2026-09-05 00:20 UTCEG score recompute
  26. 2026-09-05 00:20 UTCGHSA enrichment
  27. 2026-09-04 05:07 UTCEPSS rescore
  28. 2026-09-03 22:17 UTCGHSA enrichment
  29. 2026-09-02 20:16 UTCEG score recompute
  30. 2026-09-02 20:15 UTCGHSA enrichment
  31. 2026-09-02 14:12 UTCEPSS rescore
  32. 2026-09-01 18:09 UTCEG score recompute▲ 0.30
  33. 2026-09-01 18:09 UTCGHSA enrichment
  34. 2026-09-01 18:09 UTCNVD updateCVSS v3 → 5.4
  35. 2026-09-01 13:54 UTCEPSS rescore
  36. 2026-08-31 18:52 UTCGHSA enrichment
  37. 2026-08-31 15:24 UTCEG score recompute
  38. 2026-08-31 15:23 UTCGHSA enrichment
  39. 2026-08-31 14:25 UTCEG score recompute
  40. 2026-08-31 14:25 UTCGHSA enrichment
  41. 2026-08-31 13:25 UTCGHSA enrichment
  42. 2026-08-31 12:23 UTCEG score recompute
  43. 2026-08-31 12:05 UTCEG score recompute
  44. 2026-08-31 12:04 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-76984?
CVE-2026-76984 is a medium vulnerability published on August 31, 2026. Improper neutralization of input during web page generation in Apache Wicket. org.apache.wicket.markup.head.MetaDataHeaderItem generates <meta> and <link> header tags. It escaped the attribute names it wrote, but ran the attribute values through a replacement of " with \". A backslash before a…
When was CVE-2026-76984 disclosed?
CVE-2026-76984 was first published in the National Vulnerability Database on August 31, 2026, with the most recent update on September 1, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-76984 actively exploited?
CVE-2026-76984 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 59.5% of all scored CVEs.
What is the CVSS score of CVE-2026-76984?
CVE-2026-76984 has a CVSS v3 base score of 5.4 (NVD).
How do I remediate CVE-2026-76984?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-76984, 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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